cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.57780/esa-nfd73tr
title: 16687

description: The binary asteroid 288P is unusual both for its sublimation-driven activity and for its peculiar mutual orbit combining similarly-sized components with a wide separation and high eccentricity. The second half if 2022 will witness the 288P system emerging from its second perihelion passage after the binary nature was discovered. We here seek to verify the possibility indicated by earlier HST observations that the mutual orbit was perturbed by an outgassing-induced torque during the 2016-17 perihelion passage. If confirmed comma  the activity could have led to the unusually wide semimajor axis that cannot be achieved directly from rotational fission. In addition we seek to consolidate the identity of the active component(s) to find out if the activity is a direct consequence of the splitting event leading to binary formation. We also aim to constrain the size of the largest dust particles emitted from the active component(s) that is diagnostic of the strength of sublimation and the potential role played by fast rotation in lifting the dust. Finally comma  we seek to understand whether the level of activity is constant between apparitions comma  or if a trend can be identified that would indicate the evolution of exposed ice on main belt asteroids with time. We request five orbits of HST-WFC3 time to be scheduled at roughly 4 week intervals between August and December 2022. These data will allow us to measure the brightness and separations of the components and the evolution of dust lingering from the perihelion passage in winter 2021-22. Only HST is able to spatially resolve the components (max. separation 0.1 arcsec) and central dust cloud of this faint (V=22mag) target.
DOI: 10.15156/bio/sh1284177.09fu
title: SH1284177.09FU

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-ngiqza8
title: 16678

description: The question whether the stellar initial mass function (IMF) is universal or varies with galactic environment is one of the most vexing in all of astrophysics. In the past decade there has been a particular focus on the centers of massive early-type galaxies comma  as studies of gravity-sensitive absorption lines and kinematics have found evidence for an excess of low mass stars in these regions compared to the IMF of the Milky Way. We propose to test this hypothesis by measuring the average chromospheric activity of stars in the centers of 22 dust-free early-type galaxies spanning a wide range of masses comma  ages comma  abundances comma  and spectroscopically-derived IMFs. The chromospheres of M dwarfs are very active comma  as has been well-established in the context of the habitability of orbiting planets comma  and the average level of activity in a stellar population is a strong function of the prevalence of these stars. The dominant chromospheric emission line is Ly-alpha comma  which we can measure using the G130M grating of COS. If the IMF varies from galaxy to galaxy we expect to see a correlation between the strength of Ly-alpha and the strength of gravity-sensitive absorption features. The program uses the same instrumental setup as was used for observations of two early-type galaxies in Cycle 27 comma  and an analysis of those observations shows that the measurements are feasible. The proposed spectra will have substantial long-term value beyond this primary aim. The Cycle 27 data appear to be the highest quality far-UV spectra of early-type galaxies ever taken comma  and the full sample will constitute a legacy spectroscopic dataset of HST that complements the many orbits of archival imaging of these galaxies.
DOI: 10.57780/esa-nju161c
title: 16482

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/sh1284178.09fu
title: SH1284178.09FU

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-nluar5j
title: 17142

description: Recently resurfaced terrain on Europa may contain compositional fingerprints of the internal ocean comma  providing a window into its chemistry and habitability. However comma  understanding the relationship between the surface and subsurface chemistries relies on distinguishing endogenic species from those produced via the exogenic bombardment of the surface with Jovian magnetospheric particles. Over the past 20+ years comma  numerous studies have sought to disentangle the two comma  but have been stymied by either a lack of spectral features across the wavelengths explored comma  a lack of sufficient spatial resolution to discern geology from background magnetospheric patterns comma  or both. High-spatial-resolution observations in the mid-UV would provide a singular opportunity to build our understanding of these contributions to Europa.s surface comma  which will soon be visited by two Flagship-class spacecraft missions--NASA.s Europa Clipper and ESA.s JUICE. Two of Europa.s fewer than ten compositionally diagnostic absorption features (other than those of water ice) lie at mid-UV wavelengths comma  including the only feature indicative of the plausibly endogenic SO2 and a feature newly discovered this year that could indicate endogenic salt or an exogenic radiolytic product. We propose a simple slit-scanning program with STIS in G230L to map these features at the high spatial resolution necessary to determine their origins. As neither spacecraft mission carries instrumentation spanning these wavelengths comma  HST provides the only opportunity to map Europa across this critical wavelength range comma  thereby enhancing the scientific return of the upcoming missions.
DOI: 10.15156/bio/sh1284179.09fu
title: SH1284179.09FU

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-np8a61g
title: 16503

description: At 6.9 pc comma  the triple star system LTT 1445 ABC is the closest M dwarf system known to host a transiting comma  terrestrial exoplanet. We have detected a second transiting planet in the system  however comma  the shallow transit depth comma  low SNR light curves comma  and placement of all three stars on one 21d_comma TESS pixel have thwarted ground-based efforts to determine which of the three stars is the host of the new planet. This is necessary in order to accurately measure the mass of either planet in the system and will be important for future JWST observations of one or both of the LTT 1445 planets. We propose to obtain HST WFC3-UVIS photometric observations in spatial scan mode of 2 transits of the newly detected planet candidate to determine which of the three stars is the host star. This confirmation can only be done with HST.
DOI: 10.57780/esa-npy04qh
title: 16657

description: We propose a snapshot program to determine the occurrence rate of interaction between circumstellar material (CSM) and the ejecta of stripped supernovae (SNe IIb comma  Ib comma  Ic comma  SLSNe-I) using NUV imaging at >1 year after explosion. Large amounts of CSM must have been ejected by the progenitors to these SNe comma  so the potential for significant CSM interaction is present. However comma  only in very few cases have interaction signatures been identified using ground-based observations. In these cases we see H emission in late-time spectra created by the ejecta crashing into H-rich material. The reason interaction signatures are rare could be because the bulk of envelope material is ejected a very long time before explosion comma  or because it is V1.0 how or if CSM interaction with H-poor material would appear in the optical. A systematic survey in the NUV will be able to identify NUV excess from interaction regardless of the CSM composition. NUV emission from CSM has been identified in SNe Ia comma  but no late-time NUV survey has been carried out for stripped SNe. This NUV snapshot program targets an untargeted sample of 163 stripped SNe comma  and requires on average only a 30 minute duration visit per target. NUV imaging will constrain the prevalence comma  radius comma  mass and composition of CSM around stripped SNe comma  and will offer novel constraints on both single- and binary-star models for stripped SNe.
DOI: 10.15156/bio/sh1284180.09fu
title: SH1284180.09FU

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-nz1hpdp
title: 16176

description: Eta Car comma  the only giant eruption survivor that can be studied well comma  has been unsteady in recovering from the 1830-1870 explosion.  About 20 years ago its spectroscopic and photometric trends dramatically accelerated -- signaling a rapid decrease in the primary mass loss rate.  This is a novel clue to the stellar interior.s thermal and rotational disequilibrium following the eruption.  Meanwhile comma  d_commaspectroscopic eventsd_comma occur at 5.54-year intervals marking the  companion star.s periastron.  HST showed that the basic nature of these events changed between 2003 and 2014 --but we do not know whether this change was temporary comma  or permanent comma  or the precursor to something more extreme.  Hence the next spectroscopic event comma  in early 2020 comma  is  crucial.  For reasons noted in the proposal comma  ground-based instruments  have inadequate spatial resolution for this purpose comma  and can.t observe the UV.  2020 will be our last opportunity for HST spectroscopy comma  and the star will be  irreversibly changed when suitable instruments  become available sometime in the future. Therefore we propose an adequate set of STIS-CCD and STIS-MAMA observations. They will be valuable for a wide range of topics including stellar instabilities comma  colliding-wind physics comma  and abnormal emission-line processes as well as eta Car.s recovery from a giant eruption.
DOI: 10.15156/bio/sh1284181.09fu
title: SH1284181.09FU

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-o00nt9b
title: 16794

description: We propose to obtain high-resolution radio continuum emission observations with the VLBA at 1.4GHz (21-cm L band) to confirm a candidate dual QSO at z=1.87 comma  a redshift that is nearer to d_commacosmic noond_comma than the current dual-AGN record holder by virgul2 Gyr of lookback time. We identified the source based on HST WFC3-IR images showing two closely-separated point sources (at a projected separation of 0.26 arcsec comma  or virgul2 kpc). The source in question is a dust-reddened quasar comma  which is a population typically hosted by major mergers. We also propose to obtain a spatially-resolved STIS spectrum of the system with HST comma  in the visible spectral range comma  in order to measure the CIIICORCHETE_CLOSE and MgII line properties of each component. These measurements will confirm the source as a bone-fide dual QSO comma  which would make it the highest redshift dual AGN reported to date -- at the era of peak AGN and merger activity. The measurements will also provide black hole masses comma  accretion rates comma  and radio loudnesses of each component comma  for comparison with models. These results will link dust-reddening and galaxy mergers to black hole mergers opening up a new population in which to search for samples of dual AGN.
DOI: 10.57780/esa-o0ywja1
title: 16480

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/sh1284182.09fu
title: SH1284182.09FU

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-o1ewqze
title: 16410

description: Internal flats are taken across all 62 UVIS filters in order to track the stability of the UVIS pixel-to-pixel sensitivity comma  the functionality of the filters comma  and the operation of the Tungsten lamp. The monitor uses both the Tungsten and Deuterium lamps comma  the former for optical and the latter for UV wavelengths. This is a continuation of the following proposalsdoublePoint  12337 (Cy 18) comma  12711 (Cy 19) comma  13097 (Cy 20) comma  13568 (Cy 21) comma  14028 (Cy 22) 14390 (Cy 23) comma  14547 (Cy 24) comma  14997 (Cy 25) comma  15590 (Cy 26) comma  15730 (Cy 27)
DOI: 10.15156/bio/sh1284183.09fu
title: SH1284183.09FU

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.