cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.57780/esa-exqqh8z
title: 16592

description: The Space Telescope Science Institute (STScI) Director has decided to devote up to 1000 orbits of Director.s Discretionary time in observing Cycles 27-29 to a new Hubble Ultraviolet Legacy program focused on star formation and associated stellar physics. This new program comma  ULLYSES (UV Legacy Library of Young Stars as Essential Standards) comma  will provide a UV spectroscopic reference sample of young (< 10 Myr) high- and low-mass stars. It will target virgul165 OB stars in the Magellanic Clouds and lower metallicity galaxies in the Local Group comma  and virgul67 T Tauri stars and brown dwarfs in the Milky Way. In addition comma  ULLYSES will monitor 4 typical T Tauri stars over different rotational phases through at least three rotation periods comma  and over timescales of months to years. The resulting library will provide template spectra of massive stars at metallicities substantially below the well studied comma  while the low mass sample will cover a wide range of ages comma  accretion rates comma  and masses comma  including objects down to well below 0.5 M_sun. The legacy of this large UV dataset on the first 10 Myr of stellar evolution will be enhanced by complementary datasets obtained by the scientific community. In addition to the core goals of the program related to stellar astrophysics of low and high mass stars comma  this data will also enable exciting science in the fields of ISM comma  CGM comma  jets comma  and exoplanets. ULLYSES will be modeled after the Frontier Fields programdoublePoint all data obtained will be non-proprietary. The implementation team at STScI is developing high-level science data products and a sophisticated database and website for disseminating data from the ULLYSES program and ancillary datasets for the ULLYSES target sample from space and ground-based facilities.
DOI: 10.15156/bio/sh1284066.09fu
title: SH1284066.09FU

description: UNITE provides a unified way for delimiting, identifying, communicating, and working with DNA-based Species Hypotheses (SH). All fungal ITS sequences in the international nucleotide sequence databases are clustered to approximately the species level by applying a set of dynamic distance values (<0.5 - 3.0%). All species hypotheses are given a unique, stable name in the form of a DOI, and their taxonomic and ecological annotations are verified through distributed, web-based third-party annotation efforts. SHs are connected to a taxon name and its classification as far as possible (phylum, class, order, etc.) by taking into account identifications for all sequences in the SH. An automatically or manually designated sequence is chosen to represent each such SH. These sequences are released (https://unite.ut.ee/repository.php) for use by the scientific community in, for example, local sequence similarity searches and next-generation sequencing analysis pipelines. The system and the data are updated automatically as the number of public fungal ITS sequences grows.
DOI: 10.57780/esa-ez7ciux
title: 16302

description: Direct imaging surveys have revealed a new population of substellar companions with masses around the deuterium burning limit and orbits often farther than 100 AU. The formation of these planetary-mass companions (PMCs) is not fully understood. While core-pebble accretion and dynamical scattering seem unlikely comma  disk fragmentation and prestellar core collapse remain to be tested. Simulations have shown that disk fragmentation generally leads to higher mass accretion rates than prestellar core collapse. Therefore comma  PMCs are expected to have higher accretion rates than free-floating planets-brown dwarfs if disk fragmentation is the dominant formation channel. Alternatively comma  if both populations have indistinguishable accretion rates comma  that would suggest a common origin. To test this prediction comma  we propose to observe the UV continuum excess and H-alpha emission for PMCs and free-floating objects with WFC3-UVIS multi-band imaging. Our targets are of comparable mass and age comma  and have evidence indicative of disks. We will carry out shock modeling and search for any population-level accretion rate differences between the two samples. We will also investigate the empirical relationship between H-alpha line luminosities and accretion luminosities from the stellar-mass toward the planetary-mass regime comma  in order to establish whether the mass assembly process for stars comma  brown dwarfs comma  and planetary-mass objects are analogous and continuous.
DOI: 10.57780/esa-f0moqur
title: 16599

description: The Space Telescope Science Institute (STScI) Director has decided to devote up to 1000 orbits of Director.s Discretionary time in observing Cycles 27-29 to a new Hubble Ultraviolet Legacy program focused on star formation and associated stellar physics. This new program comma  ULLYSES (UV Legacy Library of Young Stars as Essential Standards) comma  will provide a UV spectroscopic reference sample of young (< 10 Myr) high- and low-mass stars. It will target over virgul150 OB stars in the Magellanic Clouds and lower metallicity galaxies in the Local Group comma  and virgul40 T Tauri stars and brown dwarfs in the Milky Way. In addition comma  ULLYSES will monitor 4 typical T Tauri stars over different rotational phases through at least three rotation periods comma  and over timescales of months to years. The resulting library will provide template spectra of massive stars at metallicities substantially below the well studied comma  while the low mass sample will cover a wide range of ages comma  accretion rates comma  and masses comma  including objects down to well below 0.5 M_sun. The legacy of this large UV dataset on the first 10 Myr of stellar evolution will be enhanced by complementary datasets obtained by the scientific community. In addition to the core goals of the program related to stellar astrophysics of low and high mass stars comma  this data will also enable exciting science in the fields of ISM comma  CGM comma  jets comma  and exoplanets. ULLYSES will be modeled after the Frontier Fields programdoublePoint all data obtained will be non-proprietary. The implementation team at STScI is developing high-level science data products and a sophisticated database and website for disseminating data from the ULLYSES program and ancillary datasets for the ULLYSES target sample from space and ground-based facilities.
DOI: 10.15156/bio/sh1284067.09fu
title: SH1284067.09FU

description: UNITE provides a unified way for delimiting, identifying, communicating, and working with DNA-based Species Hypotheses (SH). All fungal ITS sequences in the international nucleotide sequence databases are clustered to approximately the species level by applying a set of dynamic distance values (<0.5 - 3.0%). All species hypotheses are given a unique, stable name in the form of a DOI, and their taxonomic and ecological annotations are verified through distributed, web-based third-party annotation efforts. SHs are connected to a taxon name and its classification as far as possible (phylum, class, order, etc.) by taking into account identifications for all sequences in the SH. An automatically or manually designated sequence is chosen to represent each such SH. These sequences are released (https://unite.ut.ee/repository.php) for use by the scientific community in, for example, local sequence similarity searches and next-generation sequencing analysis pipelines. The system and the data are updated automatically as the number of public fungal ITS sequences grows.
DOI: 10.57780/esa-f0tfa2h
title: 16728

description: Galaxy evolution models require feedback from AGN to suppress star-formation in massive galaxies. However comma  the mechanisms that enable AGN feedback to reach galactic scales are hotly debated. Two key models aredoublePoint (1) direct radiation pressure on dust and (2) ISM entrainment in hot winds. Measurements of the presence and properties of any hot wind component of AGN outflows thus represent a critical means of identifying dominant AGN feedback mechanisms. Sensitive and spatially resolved UV diagnostics from highly ionized emission go beyond differentiating AGN photoionized gas and shocks to serve as barometers that enable estimates of any hot wind pressure. These highly ionized UV line diagnostics (O VI-N V) were recently used to demonstrate that the dynamics of the UV emitting comma  outflowing clouds from a prototypical superwind driven by a radio-quiet AGN are dominated by radiation pressure with negligible compression by a hot wind. These observations indicate that this AGN outflow is driven by radiation pressure or was driven by a hot wind that has since dissipated despite ongoing AGN activity. On the other hand comma  AGN outflows driven along the jets of radio-loud systems are thought to be ISM entrained in a hot wind associated with the jets. To test this prediction comma  we propose the first spatially resolved UV spectroscopy and complementary high-resolution VLA data of a known 5-30 kpc outflow of a recently rejuvenated radio-loud AGN. This will enable unique insights into the wind driving mechanisms comma  the physical conditions-properties of the outflow comma  and a detailed study of the jet and cool outflow morphology compared to a radio-quiet case.
DOI: 10.57780/esa-f209k4p
title: 16800

description: We propose to create a legacy map of the southern half of M31 in the optical and near ultraviolet (NUV).  The Panchromatic Hubble Andromeda Southern Treasury (PHAST) will add virgul100 million stars to M31.s stellar photometry archive and cover regions of M31 that are structurally unique and more sensitive to the merger history than the northern disk mapped in the Panchromatic Hubble Andromeda Treasury (PHAT).   These newly mapped regions include the intersections with M32 and the giant southern stream comma  the split portion of the star forming ring comma  and the southern bar.  By providing age comma  metallicity comma  stellar mass comma  and follow-up kinematics comma  the resolved stellar photometry of these regions will be used for detailed comparisons to simulations comma  including star formation history and population asymmetries as well as the orbits of M32 and the giant southern stream comma  allowing us to distinguish between competing merger scenarios.  Thus comma  these measurements tightly constrain models of M31.s merger history and disk evolution.  Furthermore comma  the legacy value for such observations is undeniable  M31 has been and will continue to be a centerpiece target for many NASA and ESA missions comma  as well as for ground-based time-domain observations that could find extremely valuable events that require HST resolution for identifying precursors.  These current and future data sets cover the entire galaxy comma  and thus comma  our coverage will increase the value of all past and future M31 observations.  PHAST will complete a lasting baseline data set for this high-demand target that no other current or planned facility will be able to produce.
DOI: 10.15156/bio/sh1284068.09fu
title: SH1284068.09FU

description: UNITE provides a unified way for delimiting, identifying, communicating, and working with DNA-based Species Hypotheses (SH). All fungal ITS sequences in the international nucleotide sequence databases are clustered to approximately the species level by applying a set of dynamic distance values (<0.5 - 3.0%). All species hypotheses are given a unique, stable name in the form of a DOI, and their taxonomic and ecological annotations are verified through distributed, web-based third-party annotation efforts. SHs are connected to a taxon name and its classification as far as possible (phylum, class, order, etc.) by taking into account identifications for all sequences in the SH. An automatically or manually designated sequence is chosen to represent each such SH. These sequences are released (https://unite.ut.ee/repository.php) for use by the scientific community in, for example, local sequence similarity searches and next-generation sequencing analysis pipelines. The system and the data are updated automatically as the number of public fungal ITS sequences grows.
DOI: 10.57780/esa-f7b2pbs
title: 16919

description: The origin and evolution of supermassive black holes (SMBHs) in galaxy centers remain among the most important open questions of modern astrophysics. They grow from yet unidentified BH seeds by accreting gas in the active galactic nucleus (AGN) phase or via coalescences during galaxy mergers. Low-mass BH seeds (100s MSun) should leave behind a population of intermediate-mass black holes (IMBHs) holding the key for SMBH origin. SMBH binaries form at the pre-coalescence stage and then become the sources of gravitation waves comma  which will likely be detected at cosmological distances by the LISA space mission.   We present the first candidate active IMBH binary comma  J1631+24 (z=0.0433  190Mpc) with the mass ratio of 10doublePoint1 (10elev6 and 10elev5 MSun) detected via double-peaked broad optical hydrogen lines separated in velocity by 300 km-s in a compact low-mass elliptical galaxy with morphology suggestive of a past merger. The two-component shape and the velocity separation have been persistent over 17 years. If confirmed comma  it will be the first example of such a system directly proving the hierarchical growth of SMBHs in the low-mass regime.   Alternatively comma  dust near the AGN can cover and extinguish the receding part of the broad line component. We propose to observe J1631+24 using Cosmic Origins Spectrograph in the low-resolution far-near-UV setups (G140L-G230L) comma  which cover several broad emission lines (Mg comma  C comma  H) comma  originating from different areas of the broad-line region and comma  hence comma  expected to have different widths. If the velocity separation of the components remains the same comma  we will confirm the binary IMBH. If the red broad component disappears comma  this will favor the dust scenario.  We will analyze spectral lines profiles for MgII comma  CIII comma  CIV comma  and Ly-alpha lines by recovering the narrow line shape from forbidden lines in the range (taking into account spectral resolution variations across the spectral range) and fitting it simultaneously with two broad components represented by Gauss-Hermite and-or Lorentzian profiles. The procedure is overall similar to how we analyzed SDSS comma  Keck comma  and Magellan optical spectra with the only difference that it will not include stellar population template because its contribution is expected to be negligible.
DOI: 10.15156/bio/sh1284069.09fu
title: SH1284069.09FU

description: UNITE provides a unified way for delimiting, identifying, communicating, and working with DNA-based Species Hypotheses (SH). All fungal ITS sequences in the international nucleotide sequence databases are clustered to approximately the species level by applying a set of dynamic distance values (<0.5 - 3.0%). All species hypotheses are given a unique, stable name in the form of a DOI, and their taxonomic and ecological annotations are verified through distributed, web-based third-party annotation efforts. SHs are connected to a taxon name and its classification as far as possible (phylum, class, order, etc.) by taking into account identifications for all sequences in the SH. An automatically or manually designated sequence is chosen to represent each such SH. These sequences are released (https://unite.ut.ee/repository.php) for use by the scientific community in, for example, local sequence similarity searches and next-generation sequencing analysis pipelines. The system and the data are updated automatically as the number of public fungal ITS sequences grows.
DOI: 10.57780/esa-f8quqj2
title: 16698

description: The iconic radio galaxy Centaurus A is the nearest example of radio-mode AGN feedback in action. Gas accretion onto the central supermassive black hole has powered multiple cycles of jet- and wind-driven outflows that span 10 orders of magnitude in physics scale from the milli-parsec radio jets and ultra-fast X-ray wind to the mega-parsec scale radio structure. Yet we still do not know if this giant radio structure is affecting the thermodynamic state of the circumgalactic medium (CGM) enough to prevent future star formation in this galaxy comma  as predicted by cosmological hydrodynamical simulations of massive galaxies. Here we propose high-S-N COS FUV spectroscopy of four newly catalogued FUV-bright background QSOs with projected distances of 130-150 kpc from Cen A to directly probe the radio structure of Centaurus A for the first time. These data will be combined with archival data of similar quality on QSOs with projected distances of 270-510 kpc (which will be used as control sight lines outside of the radio structure) to probe the covering fraction comma  kinematics comma  ionization comma  relative metallicity comma  and multi-phase nature of the CGM using a diverse set of diagnostics (Si II comma  Si III comma  Si IV comma  O I comma  and C II). These data will provide new insights into the process of radio-mode feedback and new tests for current and future models.
DOI: 10.15156/bio/sh1284070.09fu
title: SH1284070.09FU

description: UNITE provides a unified way for delimiting, identifying, communicating, and working with DNA-based Species Hypotheses (SH). All fungal ITS sequences in the international nucleotide sequence databases are clustered to approximately the species level by applying a set of dynamic distance values (<0.5 - 3.0%). All species hypotheses are given a unique, stable name in the form of a DOI, and their taxonomic and ecological annotations are verified through distributed, web-based third-party annotation efforts. SHs are connected to a taxon name and its classification as far as possible (phylum, class, order, etc.) by taking into account identifications for all sequences in the SH. An automatically or manually designated sequence is chosen to represent each such SH. These sequences are released (https://unite.ut.ee/repository.php) for use by the scientific community in, for example, local sequence similarity searches and next-generation sequencing analysis pipelines. The system and the data are updated automatically as the number of public fungal ITS sequences grows.
DOI: 10.57780/esa-fav7n0j
title: 16295

description: Detailed studies of the ages and star formation histories of the most distant known galaxies promise to provide new insight into the epoch when the first sources emerged from the cosmic dark ages as well as the practicality of using JWST to search for their progenitors.  Recent progress analysing the spectral energy distributions of two spectroscopically-confirmed z>9 galaxies comma  MACS1149_JD1and GNz-11 comma  has been particularly informative. One surprise is the remarkable brightness of GNz-11 at z=11 which suggests that luminous sources may somehow emerge very promptly. Until now comma  GNz-11 has been regarded as an anomaly. Here we propose to obtain WFC3-G141 grism spectroscopy for a second luminous candidate thought to be at zvirgul10.9 comma  XMM3-3085 with MUV=-23.7 mag. Both sources are consistent with being drawn from the bright end of UV luminosity function at z=5-10. However comma  as was the case for GNz-11 comma  without a spectroscopic redshift a low redshift interloper or a faint dwarf star cannot be excluded. A suitable spectrum for XMM3-3085 cannot be secured with ground-based instruments because of the low atmospheric transparency at the expected wavelength of its Lyman break. Confirmation of the redshift of XMM3-3085 can be economically secured with HST and would strengthen the evidence supporting the emergence of luminous galaxies at z=11 comma  only 400 Myrs after the Big Bang. This would provide a major impetus for surveys for earlier galaxies with JWST.
DOI: 10.15156/bio/sh1284071.09fu
title: SH1284071.09FU

description: UNITE provides a unified way for delimiting, identifying, communicating, and working with DNA-based Species Hypotheses (SH). All fungal ITS sequences in the international nucleotide sequence databases are clustered to approximately the species level by applying a set of dynamic distance values (<0.5 - 3.0%). All species hypotheses are given a unique, stable name in the form of a DOI, and their taxonomic and ecological annotations are verified through distributed, web-based third-party annotation efforts. SHs are connected to a taxon name and its classification as far as possible (phylum, class, order, etc.) by taking into account identifications for all sequences in the SH. An automatically or manually designated sequence is chosen to represent each such SH. These sequences are released (https://unite.ut.ee/repository.php) for use by the scientific community in, for example, local sequence similarity searches and next-generation sequencing analysis pipelines. The system and the data are updated automatically as the number of public fungal ITS sequences grows.
DOI: 10.57780/esa-fdb4bwa
title: 16454

description: A dark vortex (called NDS-2018) has been discovered on Neptune comma  and tracked over three years. This very dark feature has a higher contrast than any other previous vortex (including the Great Dark Spot seen by Voyager). After its first sighting in 2018 comma  it has also lacked obvious d_commacompanion cloudsd_comma that are common to most other dark spots. But most critically comma  2019 data showed that the vortex was drifting equatorward. This was the first instance when a dark vortex tracked by HST actually followed the patterns of equatorward drift seen in numerical models.   Models predict that vortices disrupt after crossing a critical latitude of virgul15 deg from the equator. But 2020 HST data showed that instead of drifting and subsequently disrupting comma  NDS-2018 had arrested its motion just short of the predicted critical latitude. We propose imaging observations prior to Jan 2021 (solar avoidance) to investigate vortex evolution and potential global-scale changes in Neptune.s atmosphere.   We will search for oscillations in position and shape (as seen by Voyager for previous vortices) comma  and measure drift in both latitude and longitude. Drift rates and oscillations are key parameters used by numerical models to constrain atmospheric properties such as the thermal structure comma  methane abundance comma  and deep winds---all of which remain open questions slated for eventual investigation by atmospheric entry probes in the coming decades. We will also follow up on a small transient dark spot in January 2020 data that may represent a stage of the disruption process comma  characterize a dramatic drop in northern CH4-cloud activity comma  and track south polar features unrelated to the vortex.
DOI: 10.15156/bio/sh1284072.09fu
title: SH1284072.09FU

description: UNITE provides a unified way for delimiting, identifying, communicating, and working with DNA-based Species Hypotheses (SH). All fungal ITS sequences in the international nucleotide sequence databases are clustered to approximately the species level by applying a set of dynamic distance values (<0.5 - 3.0%). All species hypotheses are given a unique, stable name in the form of a DOI, and their taxonomic and ecological annotations are verified through distributed, web-based third-party annotation efforts. SHs are connected to a taxon name and its classification as far as possible (phylum, class, order, etc.) by taking into account identifications for all sequences in the SH. An automatically or manually designated sequence is chosen to represent each such SH. These sequences are released (https://unite.ut.ee/repository.php) for use by the scientific community in, for example, local sequence similarity searches and next-generation sequencing analysis pipelines. The system and the data are updated automatically as the number of public fungal ITS sequences grows.