cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.57780/esa-o1yh3kl
title: 16109

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: 10.57780/esa-o3gxosj
title: 16778

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/sh1284184.09fu
title: SH1284184.09FU

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-o5dynt3
title: 16166

description: JWST will launch during HST cycle 28 and begin an unprecedented era in atmospheric characterization for all types of exoplanets.  Atmospheric spectroscopy of warm rocky planets comma  sub-Neptune comma  and Jupiter-mass planets will be obtained through a robust set of guaranteed transiting planet observations (the JWST ERS and GTO programs).    To accurately model and interpret observations of these planets. atmospheres comma  we must understand the high-energy SED of their host starsdoublePoint FUV and NUV-driven photochemistry shapes an atmosphere.s molecular abundances and the formation of hazes comma  EUV irradiation can erode a planet.s gaseous envelope comma  and flares can affect long term stability.   A number of recent surveys have used HST.s UV capabilities to characterize the energetic irradiance spectra across a range of stellar masses comma  ages comma  and activity levels. While these surveys have proven invaluable for predicting photochemical tracers and evolution of an exoplanet.s atmosphere comma  they have also shown scatter in behavior and irradiance properties for stars of similar type. As a result comma  direct UV observations remain the gold standard for understanding the effects of the stellar irradiance on a specific exoplanet.  We propose to obtain temporally-resolved UV (1150-3200 Ang) stellar spectroscopy of the 13 JWST guaranteed time targets with no UV characterization data in the HST archive.  Our proposed observations will provide the UV context necessary to determine the likelihood of atmospheric formation and retention comma  the identification and interpretation of atmospheric chemistry comma  and the impacts of stellar activity on the exoplanet atmospheric stability.
DOI: 10.15156/bio/sh1284185.09fu
title: SH1284185.09FU

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-o5ta3oy
title: 16293

description: Observations of the ultra-faint dwarfs (UFDs) comma  as relics of the epoch of reionization comma  allow us to probe the earliest epochs of star formation (SF). In particular comma  the UFDs in low density environments for most of their lifetimes provide unique tools to probe the effects of early environmental conditions on the SF histories (SFHs) of the UFDs and their sub-solar initial mass function (IMF) because they likely maintain the best 'fossil. record of early local environments.   We propose to obtain deep ACS and UVIS imaging in F606W and F814W for 2 LMC satellite UFDs that are on their first approach to our Galaxy comma  and thus resided in the outskirts of the Local Group at high redshift. This program is designed to identify systematic differences in the stellar populations of recently captured UFDs vs. long-term MW satellites (data available from previous programs) by using high-fidelity color-magnitude diagrams constructed from deep HST imaging as well as spectroscopically measured metallicity distribution functions. We willdoublePoint (1) Establish whether SF is quenched at different times with different rate in UFDs in low density environment at early times comma  probing the patchiness of reionization by directly comparing with theoretical predictions  (2) Identify variations in the sub-Solar IMF across UFDs born in different environments  (3) Pave the way for a more accurate constraint on the MW halo mass.
DOI: 10.57780/esa-o60of38
title: 16237

description: We request deep near-infrared imaging of an SPT-selected protocluster comma  SPT0311-62 located at z=6.9. It possesses a very large virgul10elev13 Msun halo mass for any structure at z>4 comma  immense at zvirgul7. Selected via millimeter-wavelength dust emission in the 2500 square degree South Pole Telescope (SPT) survey comma  it has been resolved by ALMA into 11 gas-rich galaxies comma  the 6 brightest -most massive confirmed spectrally to lie in an extended protocluster. Sensitive observations of carbon monoxide and ionized carbon with ALMA comma   allow  assessment of the obscured star formation and gas masses of bright cluster members. The goal of this proposal is to obtain F160W comma  F125W comma  F814W HST imaging (3 tiled pointings in WFC3 comma  1 pointing ACS) to measure the stellar properties comma  galaxy morphologies comma  and assess the spatial extent of these structures. The proposed HST observations will provide the imaging and photometric information required for a complete picture of the obscured and unobscured stellar components of the ALMA galaxies comma  and the expected overdensity of LBGs comma  revealing the complicated structure in the gas-rich galaxies that host rapid star formation and the less luminous galaxies which trace the filaments of an early collapsing structure. The combination of high resolution ALMA datasets with the proposed HST observations will allow a full characterization of the stars comma  gas comma  and dust in this cosmologically important protocluster of primordial starburst galaxies comma  well into the epoch of reionization in the Universe. From an outreach perspective comma  the high spatial resolution of the HST identifications of protocluster galaxies will complement the ALMA data in publicizing these high impact results.
DOI: 10.15156/bio/sh1284186.09fu
title: SH1284186.09FU

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-o7l7qkw
title: 17093

description: In the current cosmological framework comma  galactic superwinds play a pivotal role in regulating star formation and producing the observed stellar mass function. Theory suggests that galactic winds impede the flow of cool gas from the circumgalactic medium (CGM) onto the disk of galaxies  however comma  the microphysics of how galactic winds do so is still a mystery. The goal of this program is to unveil this elusive process.  We propose to observe the CGM of a complete sample of 42 galaxies via QSO-absorption spectroscopy in three coronal lines - CIV comma  NV comma  and OVI - that match the predicted energetics of the wind-CGM interactions. Theoretical models advocate that the differences in the strengths and kinematics of the coronal lines are necessary and sufficient indicators to identify the complex processes involved in the multiphase wind-CGM fluid interactions. Currently comma  we have only 4 galaxies with archival data on all three lines. Thus comma  the proposed dataset will be essential for constraining models of galactic feedback.  Our program will - (1) detect evidence for wind-CGM interactions in star-forming galaxies  (2) determine how the strength of the wind-CGM interactions vary with galaxy properties  and (3) compare coronal lines between observations and those predicted by idealized and cosmological simulations. Our idealized simulations incorporate non-equilibrium physics in the presence of a weak magnetic field - conditions similar to the real CGM.  We will release our data products to the community via the Hubble Legacy Archive within six months of the last observations. It will be a comprehensive dataset suitable for direct comparison with a host of ongoing simulation efforts.
DOI: 10.15156/bio/sh1284187.09fu
title: SH1284187.09FU

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-o7qwqly
title: 16501

description: We request 6 mid-cycle orbits using WFC3 in 2021 June to probe the newly suspected triple nature of main-belt comet 288P. This object is unique. It has wide separation comma  nearly equal-sized components comma  and also displays repetitive comet-like activity. 288P is one of only a few known asteroid binaries whose components can be spatially resolved by WFC3. Archival WFC3 observations obtained two months after the Cycle 28 deadline reveal that 288P is likely triple. That is comma  the light curve of one of the two main components is best represented as the sum of the lightcurves of two (spatially unresolved) components with different periods. Additional data are needed to confirm the third component. Successful identification of the third component would make 288P the first-ever detected triple asteroid system to exhibit comet-like activity comma  and provide crucial constraints on asteroid break-up models and on the role of activity-causing ice sublimation. We emphasize that these measurements maximally exploit the capabilities of HST for high resolution imaging. HST is the only telescope able to spatially separate the two main nuclei (maximum separation about 0.1 arcsec) and hence to measure their rotational lightcurves separately. The proposed observations are time-critical to be carried out in 2021 June comma  which is the last opportunity to spatially separate the two main components before the return of dust activity in fall 2021.
DOI: 10.57780/esa-o8zvicy
title: 16528

description: The stability of the CCD flat fields will be monitored using the calibration lamps. One set of observations for all the filters and another at a different epoch for a subset of filters will be taken during this cycle. High signal observations will be used to assess the stability of the pixel-to-pixel flat field structure comma  to analyze image artifacts such as the newly discovered flecks comma  and to monitor the position of the dust motes.
DOI: 10.15156/bio/sh1284188.09fu
title: SH1284188.09FU

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-obgxoq5
title: 16559

description: Monitor sensitivity of each MAMA grating mode to detect any change due to contamination or other causes. Also monitor the STIS focus in a spectroscopic and an imaging mode. Obtain exposures in each of the 2 low-resolution MAMA spectroscopic modes every 4 months comma  in each of the 2 medium-resolution modes once a year comma  and in each of the 5 echelle modes every 3 months comma  using unique calibration standards for each mode comma  and ratio the results to the first observations to detect any trends. In addition comma  each L-mode sequence will be preceeded by a CCD-F28X50OII image comma  two spectroscopic ACQ-PEAKs with the CCD-G230LB and crossed linear patterns comma  and two CCD-G230LB spectra comma  with the purpose of measuring the focus (PSF across the dispersion as a function of UV wavelength)  and each M-mode sequence will be preceded by a CCD-F28X50OII direct image also to monitor the focus.                    Beginning in Cycle 27 comma  WFC3 parallel observations have been added to all echelle visits to monitor focus contemporaneously.
DOI: 10.15156/bio/sh1284189.09fu
title: SH1284189.09FU

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-oicbohk
title: 17177

description: Low-mass (under 1 comma 000 comma 000 MSun) supermassive black holes (light-weight SMBHs) are critical to solve one of the long-standing problems in modern astrophysics comma  the origin of SMBHs. Their host galaxies hold important clues to our understanding of galaxy formation and evolution processesdoublePoint they might have evolved from ancient times in the early Universe without major merger events or intense gas accretion on-to their nuclei and comma  therefore comma  represent the relics of primordial galaxy formation. Using optical selection of AGN features and data from X-ray archives comma  we confirmed 124 light-weight active SMBHs comma  only 8 of which have available HST images. Here we propose to carry out near-UV-optical imaging of the 116 remaining light-weight SMBH host galaxies using HST WFC3 in the form of a SNAP program comma  boosting HST-observed light-weight SMBHs by larger factors. This project will yield sizes comma  luminosities comma  and stellar populations of a statistically significant sample of hosts comma  and probe whether the MBH-Mbulge scaling relation holds in the low-mass regime and central low-mass black holes do indeed co-evolve with host galaxy spheroids.
DOI: 10.57780/esa-oiv24bc
title: 16858

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.