cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.57780/esa-j6hrohz
title: 16244

description: Mass transfer occurs in binary stars across stellar masses comma  and has broad implications for astrophysics. Binary evolution with mass transfer leads to gravitational wave sources comma  SNe Ia.s comma  low mass X-ray binaries comma  sub-dwarf O-B stars comma  blue stragglers comma  and assuredly new objects in the LSST-era.  Mass transfer physics remains uncertain in crucial ways comma  one being the relative frequency of stable Roche-lobe overflow (RLOF) and unstable common-envelope (CE) evolution. Theory argues that the fork between RLOF and CE depends on binary mass ratio  higher mass ratios go through CE evolution.   Blue stragglers are tracers of the evolution of solar-like binary stars with orbital periods of less than 10 comma 000 days. HST discovery of white dwarf (WD) companions showed that most open cluster blue stragglers form via RLOF onto secondary stars near the main-sequence turnoff mass.   We propose to study blue stragglers with masses below cluster turnoffs comma  specifically the recently discovered blue lurkers in the 4-Gyr open cluster M67. Formed from binaries with higher mass ratios comma  these blue lurkers can empirically define the RLOF-CE stability criterion.  We will search for hot WD companions in the blue lurker binaries using ACS-SBC FUV photometry comma  and determine their formation times from cooling ages. Discovery of WDs would establish that blue lurkers also have predominantly stable RLOF origins. Their larger progenitor mass ratios then provide new guidance for mass-transfer theory comma  including stability conditions comma  the frequency of CE evolution comma  and mass transfer efficiencies. With the cooling age timescales comma  we will do detailed modeling of RLOF evolution pathways to the blue lurkers.
DOI: 10.15156/bio/sh1284118.09fu
title: SH1284118.09FU

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-j6hudc1
title: 16330

description: This program monitors the stability of the constant terms in the NUV dispersion solutions. To monitor for any changes comma  the program observes HD 6655 at selected cenwaves for the three NUV gratings that have seen use since Cycle 21. Via cross-correlation comma  spectra are compared to those obtained in previous iterations of the program and to STIS spectra obtained in-orbit.
DOI: 10.57780/esa-j7p5pwl
title: 16828

description: Perform routine monitoring of FUV XDL detector dark rate. The main purpose is to look for evidence of a change in the dark rate comma  both to track on orbit time dependence and to check for a detector problem developing. Variations of count rates as a function of orbital positions will be analyzed tostudy the effect of SAA. Stacked images will help us study the spatial distribution of dark rates on the detector.
DOI: 10.15156/bio/sh1284119.09fu
title: SH1284119.09FU

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-j7u3xvz
title: 16870

description: Study the effects of different postflash levels on photometry and morphology of extended sources
DOI: 10.15156/bio/sh1284120.09fu
title: SH1284120.09FU

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-j8yafd2
title: 16222

description: Leo P is the closest extremely metal poor galaxy that is still forming stars - only 1.62 Mpc away comma  with a metallicity of only 0.03 Zsol. This makes it a unique object comma  able to provide insights onto the ISM at these extreme metallicities comma  and acting as a local laboratory for understanding primitive systems at high redshift. We propose using 6 orbits of HST imaging to obtain observations of Leo P in 4 UV-NIR filters. This data will enable us to perform panchromatic extinction mapping in Leo P - fitting the multiwavelength SEDs of its stars comma  and modelling the dust along the line-of-sight to each. We will thereby produce a resolved map of the dust extinction in Leo P - the first ever map of the cold star-forming ISM in an extremely metal poor galaxy. This dust map will tell us the amount comma  location comma  and properties comma  of the dust in Leo P - providing invaluable constraints on how the ISM evolves at the lowest metallicities comma  and supporting the calibration of metallicity corrections for primitive systems at high redshift.
DOI: 10.57780/esa-jb24r93
title: 16891

description: Massive galaxies at high-z are known to co-evolve with their circumgalactic medium (CGM) comma  generally detected in Ly-alpha. The most extreme environments are Enormous Ly-alpha Nebulae (ELANe) comma  found in the cores of proto- clusters. We propose to use the VLA to observe CO(1-0) in two spectacular ELANe from an ALMA survey at zvirgul2. Q1416+2649 shows gas across 100 kpc with an extremely broad FWHM(virgul1000km-s) comma  while Q2123-0050 shows companions with widely varying CO-CI line ratios and cold gas in the CGM. The CO(1-0) observations will give the most reliable estimates of the mass of the cold gas and trace the most extended molecular reservoirs. Together with the CO(4-3) comma  CORCHETE_OPENCICORCHETE_CLOSE comma  and Lya comma  the crucial CO(1-0) data will allows us to probe the physical conditions of the multi- phase gas in the various regions of these nebulae. We will compare this to similar studies done on the enigmatic Spiderweb and MAMMOTH-I nebulae. This will start to give us a handle on the statistical properties of the various molecular tracers in ELANe comma  and allow us to study massive galaxies.
DOI: 10.15156/bio/sh1284121.09fu
title: SH1284121.09FU

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: 10.25403/upresearchdata.21430545
title: How educators perceive a no-homework policy in South African independent primary schools

description: Data was gathered using a qualitative case-study design with semi-structured interviews and document analysis in conjunction with the student engagement theory of Alexander Astin. A thematic data analysis procedure was used to analyse the collected data. Perceptions of the adoption of a no-homework policy and its infuence on learners' performances in independent primary schools were explored and themes were extracted.
DOI: 10.25403/upresearchdata.21430545.v1
title: How educators perceive a no-homework policy in South African independent primary schools

description: Data was gathered using a qualitative case-study design with semi-structured interviews and document analysis in conjunction with the student engagement theory of Alexander Astin. A thematic data analysis procedure was used to analyse the collected data. Perceptions of the adoption of a no-homework policy and its infuence on learners' performances in independent primary schools were explored and themes were extracted.
DOI: 10.57780/esa-jen0ag3
title: 16647

description: Metallicity is one of the most fundamental parameters governing both stellar and galactic evolution. However comma  the impact of metallicity on the physics of massive stars and their feedback is empirically not well constrained at low metallicities. The Magellanic Bridge comma  which is our nearest tidally interacting environment with significantly low mean metallicity Z<virgul0.1Zsol comma  offers a unique laboratory for this study. Recently three O-type and few early B-type stars in the Bridge were identified via optical spectroscopy. This newly discovered sample will allow to characterize the winds of metal-poor massive stars and to empirically establish the scaling of mass-loss with metallicity comma  which cannot be done by using optical data alone. We selected 6 UV brightest OB stars as targets to obtain COS FUV spectra. The spectra will be analyzed using advanced non-LTE stellar atmosphere models comma  thereby determining the stellar comma  wind parameters comma  and Fe abundances of individual massive stars in the Bridge. The empirical mass-loss rates at low metallicity will be used to constrain stellar evolution models. Two B stars in our sample showing high UV excess are suspected to be binaries and might hide a hot companion. The far UV spectra are crucial to identify and characterize the stripped He companions of B stars which are not found yet at low metallicity. The UV + optical spectral analysis is essential to quantify ionizing fluxes as well as mechanical energy provided by OB stars at low metallicity.  Together with physics and abundances of diffuse gas from ISM lines comma  our study will shed light on stellar feedback and star formation comma  as well as constrain the formation history of the Bridge.
DOI: 10.57780/esa-jes43zi
title: 16218

description: The first 3 good candidates to AM CVn (double degenerate binaries) binaries in a globular cluster were recently identified with HST photometry. One of them is N1851-FUV1 which was identified as a short period (18 minutes) far-ultraviolet variable near the center of the globular cluster NGC 1851 (Zurek et al 2016). The other 2 candidates have been identified in the globular cluster 47 Tuc (Rivera Sandoval et al 2018) based on a combination of the their X-ray and optical-near-ultraviolet properties. A far-ultraviolet spectrum of each of these candidates will confirm or refute these candidates as AM CVn. Their confirmation will establish globular clusters as factories of compact binaries that emit gravitational waves and which are expected to be detected with LISA. The characterization of these systems is crucial to be performed while HST is still working comma  as it is the only telescope capable to resolve the stars in the cores of globular clusters. If confirmed comma  the first comparison to AM CVns in the Galactic field will be possible comma  giving direct evidence of the impact of stellar interactions in their formation and evolution. This program may enable follow-up studies to set important constraints on double degenerate binary models.
DOI: 10.57780/esa-jgmb519
title: 16401

description: This program is a recurring UVIS calibration monitor that will observe two stellar clusters (Omega Centauri comma  and 47 Tuc) to measure the flux loss of point sources as a function of detector row number due to degrading Charge Transfer Efficiency (CTE). Because CTE is known to fluctuate with characteristics such as source flux and background level comma  this program is designed to take short and long exposures comma  at various commanded post-flash levels with the F502N filter. We will compare the results from these new observations with previous external CTE calibration programs and update the aperture phometry-based CTE model. Furthermore comma  ACS has an external CTE calibration program that observes NGC-104 at various post-flash levels that can also be used for direct comparison. Lastly comma  these data will be used to help monitor-improve the empirical pixel-based CTE correction (FLC-DRC).
DOI: 10.15156/bio/sh1284122.09fu
title: SH1284122.09FU

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-jhj3gcr
title: 16871

description: This program has been put togehter quickly to be inserted into the November 2021 schedule while ACS is the only instrument in operation.  Originally comma  we had planned to use Omega Cen for this comma  but it is not visibile in this special window of opportunity comma  so I searched for appropriate fields that could be used and found this globular cluster.  The goal of this program is to calibrate table-based CTE corrections for astrometry.  Photometry comes along for the ride comma  but we already have corrections for that from Marco Chiaberge.s long-term effort comma  so the focus here is astrometry. The photometric component of this will just be a useful cross-check.  The reason that the standard CTE program can.t measure astrometry is because we have to measure the shift of stars across the gap.  In the standard program comma  full-chip offsets are used that map bottom-chip to top-chip.  We can measure relative astrometric shifts this way comma  but not absolute shifts.  We need to have one reference exposure that d_commastraddles the gapd_comma to do this.  This program remedies that.  We will explore 8 different background levelsdoublePoint  10e (natural for this field-filter) comma  20e comma  30e comma  40e comma  60e comma  80e comma  100e comma  and 100e.  The 40 background exposure will be the d_commareferenced_comma exposures.  The result of analyzing these data will be a 2-dimensional table of corrections for photometry that will allow users and the hst1pass routine to interpolate the astrometric shift as a function of instrumental magnitude and background.  We will put together an ISR describing the analysis that went into the construction of the table.
DOI: 10.15156/bio/sh1284123.09fu
title: SH1284123.09FU

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-jhmjakt
title: 16944

description: This program uses the Tungsten calibration lamp to generate medium resolution spectroscopic CCD flats to determine the pixel-to-pixel variation for CCD spectroscopic observations with STIS. These data will be used to produce the Cycle 30 reference p-flats for the m- and l-modes.
DOI: 10.57780/esa-jlnsivj
title: 16726

description: Photo-evaporation of planetary atmospheres plays a key role in the evolution of exoplanets comma  carving their whole population. However comma  direct observations of atmospheric escape are scarce and almost non-existent in the mass range of super-Earths and mini-Neptunes comma  while these planets are among the most impacted by the phenomenon. A huge step forward could be made by achieving a comparative study of several super-Earths comma  volatile-rich or not comma  in a single multi-planet systemdoublePoint such planets would indeed experience the same evolution of the stellar X and EUV flux that are driving atmospheric escape. The perfect system for such a study has just been identifieddoublePoint the nearby comma  solar-type comma  and naked-eye star nuelev2 Lupi hosts transiting planets spanning a remarkably large range of insolation (virgul100 to virgul5x the insolation of Earth). TESS found the transits of the two inner planets and CHEOPS detected the transit of planet d comma  a volatile-rich super-Earth with an exceptional period of 107 day. These super-Earths straddle the radius gap of the d_commaevaporation valleyd_comma and could have retained different fractions of gas and volatiles. Like for previously observed warm Neptunes comma  they could be enshrouded in huge comet-like exospheric clouds of escaping gas comma  which could have built up in the mild radiative environment. The system unique combination of proximity comma  brightness and favorable planet characteristics offers a fantastic opportunity to exploit HST ultraviolet capabilities to search for the hydrogen comma  oxygen and carbon escaping three planets in whole new mass and irradiation regimes. It is the ideal testbed for advancing both observations and theories of atmospheric evaporation of exoplanets.
DOI: 10.15156/bio/sh1284124.09fu
title: SH1284124.09FU

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-jm9rzsb
title: 16429

description: We propose joint Chandra (146 ks) and HST (5 orbits) observations of PSZ2 G282.28+49.94 comma  a candidate ''bullet-liked_comma cluster. It features a cometary shape and a very large offset (350 kpc) between the X-ray peak and a galaxy clump comma  suggesting that it is undergoing a major merger shortly after core passage. In this phase comma  the collisionless components of the cluster are maximally separated from the collisional ICM comma  as in the Bullet Cluster comma  and their separation can provide constraints to the DM cross section. The large separation makes PSZ2 G282.28+49.94 a very promising target for these studies. The requested observations will allow us to map both the ICM and the DM distribution comma  to infer the dynamical history of this extreme object and to measure the offset between DM comma  gas and galaxies.