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A spectrophotometric analysis of cool white dwarfs in the Gaia and pan-STARRS footprint
Bergeron, P.; Blouin, Simon; Leggett, S. K. +1 more
We present a spectrophotometric analysis of 2880 cool white dwarfs within 100 pc of the Sun and cooler than Teff ~ 10 000 K, with grizy Pan-STARRS photometry and Gaia trigonometric parallaxes available. We also supplement our data sets with near-infrared JHK photometry, when available, which is shown to be essential for interpreting the…
Gaia Data Release 3. Properties of the line-broadening parameter derived with the Radial Velocity Spectrometer (RVS)
Smith, M.; Gosset, E.; Caffau, E. +38 more
Context. The third release of the Gaia catalogue contains radial velocities for 33 812 183 stars with effective temperatures ranging from 3100 K to 14 500 K. The measurements are based on the comparison of the spectra observed with the Radial Velocity Spectrometer (RVS; wavelength coverage: 846-870 nm, median resolving power: 11 500) to synthetic …
The Gaia-ESO Survey: empirical estimates of stellar ages from lithium equivalent widths (EAGLES)
Gilmore, G.; Guiglion, G.; Randich, S. +17 more
We present an empirical model of age-dependent photospheric lithium depletion, calibrated using a large homogeneously analysed sample of 6200 stars in 52 open clusters, with ages from 2 to 6000 Myr and -0.3 < [Fe/H] < 0.2, observed in the Gaia-ESO spectroscopic survey. The model is used to obtain age estimates and posterior age probability d…
Confirmation of Subsolar Metallicity for WASP-77Ab from JWST Thermal Emission Spectroscopy
Bean, Jacob L.; Zhang, Michael; Line, Michael +4 more
We present the dayside thermal emission spectrum of WASP-77Ab from 2.8 to 5.2 µm as observed with the NIRSpec instrument on the James Webb Space Telescope (JWST). WASP-77Ab was previously found to have a subsolar metallicity and a solar carbon-to-oxygen (C/O) ratio from H2O and CO absorption lines detected using high-resolution sp…
The Milky Way's plane of satellites is consistent with ΛCDM
Jenkins, Adrian; Frenk, Carlos; Helly, John +7 more
The Milky Way is surrounded by 11 `classical' satellite galaxies in a remarkable configuration: a thin plane that is possibly rotationally supported. Such a structure is thought to be highly unlikely to arise in the standard (ΛCDM) cosmological model (Λ cold dark matter model, where Λ is the cosmological constant). While other apparent discrepanci…
The Young Supernova Experiment Data Release 1 (YSE DR1): Light Curves and Photometric Classification of 1975 Supernovae
Rest, A.; Angus, C. R.; Foley, R. J. +85 more
We present the Young Supernova Experiment Data Release 1 (YSE DR1), comprised of processed multicolor PanSTARRS1 griz and Zwicky Transient Facility (ZTF) gr photometry of 1975 transients with host-galaxy associations, redshifts, spectroscopic and/or photometric classifications, and additional data products from 2019 November 24 to 2021 December 20…
Evidence of high-mass star formation through multiscale mass accretion in hub-filament-system clouds
Zhang, Yong; Sanhueza, Patricio; Tej, Anandmayee +30 more
We present a statistical study of a sample of 17 hub-filament-system (HFS) clouds of high-mass star formation using high-angular resolution (~1-2 arcsec) ALMA 1.3 and 3 mm continuum data. The sample includes eight infrared (IR)-dark and nine IR-bright types, which correspond to an evolutionary sequence from the IR-dark to IR-bright stage. The cent…
Spectral classification of the 100 pc white dwarf population from Gaia-DR3 and the virtual observatory
Solano, E.; Rebassa-Mansergas, A.; Torres, S. +5 more
The third data release of Gaia has provided low-resolution spectra for ~100 000 white dwarfs (WDs) that, together with the excellent photometry and astrometry, represent an unrivalled benchmark for the study of this population. In this work, we first built a highly complete volume-limited sample consisting in 12 718 WDs within 100 pc from the Sun.…
EPOCHS VII: discovery of high-redshift (6.5 < z < 12) AGN candidates in JWST ERO and PEARLS data
Grogin, Norman A.; Koekemoer, Anton M.; Pirzkal, Nor +24 more
We present an analysis of a sample of robust high-redshift galaxies selected from the 'blank' fields of the Prime Extragalactic Areas for Reionization Science (PEARLS) survey and Early Release Observations (ERO) data from JWST with the aim of selecting candidate high-redshift active galactic nuclei (AGN). Sources were identified from this parent s…
A Milky Way-like barred spiral galaxy at a redshift of 3
Papovich, Casey; Finkelstein, Steven L.; Barro, Guillermo +30 more
The majority of massive disk galaxies in the local Universe show a stellar barred structure in their central regions, including our Milky Way1,2. Bars are supposed to develop in dynamically cold stellar disks at low redshift, as the strong gas turbulence typical of disk galaxies at high redshift suppresses or delays bar formation3,…