TY - JOUR
T1 - The DESI Early Data Release white dwarf catalogue
AU - DESI Collaboration
AU - Manser, Christopher J.
AU - Izquierdo, Paula
AU - Gänsicke, Boris T.
AU - Swan, Andrew
AU - Koester, Detlev
AU - Robert, Akshay
AU - Xu, Siyi
AU - Inight, Keith
AU - Amroota, Ben
AU - Gentile Fusillo, N. P.
AU - Koposov, Sergey E.
AU - Kim, Bokyoung
AU - Dey, Arjun
AU - Prieto, Carlos Allende
AU - Aguilar, J.
AU - Ahlen, S.
AU - Blum, R.
AU - Brooks, D.
AU - Claybaugh, T.
AU - Cooper, A. P.
AU - Dawson, K.
AU - de la Macorra, A.
AU - Doel, P.
AU - Forero-Romero, J. E.
AU - Gaztañaga, E.
AU - Gontcho A Gontcho, S.
AU - Honscheid, K.
AU - Kisner, T.
AU - Kremin, A.
AU - Lambert, A.
AU - Landriau, M.
AU - Le Guillou, L.
AU - Levi, Michael E.
AU - Li, T. S.
AU - Meisner, A.
AU - Miquel, R.
AU - Moustakas, J.
AU - Nie, J.
AU - Palanque-Delabrouille, N.
AU - Percival, W. J.
AU - Poppett, C.
AU - Prada, F.
AU - Rezaie, M.
AU - Rossi, G.
AU - Sanchez, E.
AU - Schlafly, E. F.
AU - Schlegel, D.
AU - Schubnell, M.
AU - Seo, H.
AU - Silber, J.
N1 - Publisher Copyright:
© 2024 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society.
PY - 2024/11/1
Y1 - 2024/11/1
N2 - The Early Data Release (EDR) of the Dark Energy Spectroscopic Instrument (DESI) comprises spectroscopy obtained from 2020 December 14 to 2021 June 10. White dwarfs were targeted by DESI both as calibration sources and as science targets and were selected based on Gaia photometry and astrometry. Here, we present the DESI EDR white dwarf catalogue, which includes 2706 spectroscopically confirmed white dwarfs of which approximately 60 per cent have been spectroscopically observed for the first time, as well as 66 white dwarf binary systems. We provide spectral classifications for all white dwarfs, and discuss their distribution within the Gaia Hertzsprung–Russell diagram. We provide atmospheric parameters derived from spectroscopic and photometric fits for white dwarfs with pure hydrogen or helium photospheres, a mixture of those two, and white dwarfs displaying carbon features in their spectra. We also discuss the less abundant systems in the sample, such as those with magnetic fields, and cataclysmic variables. The DESI EDR white dwarf sample is significantly less biased than the sample observed by the Sloan Digital Sky Survey, which is skewed to bluer and therefore hotter white dwarfs, making DESI more complete and suitable for performing statistical studies of white dwarfs.
AB - The Early Data Release (EDR) of the Dark Energy Spectroscopic Instrument (DESI) comprises spectroscopy obtained from 2020 December 14 to 2021 June 10. White dwarfs were targeted by DESI both as calibration sources and as science targets and were selected based on Gaia photometry and astrometry. Here, we present the DESI EDR white dwarf catalogue, which includes 2706 spectroscopically confirmed white dwarfs of which approximately 60 per cent have been spectroscopically observed for the first time, as well as 66 white dwarf binary systems. We provide spectral classifications for all white dwarfs, and discuss their distribution within the Gaia Hertzsprung–Russell diagram. We provide atmospheric parameters derived from spectroscopic and photometric fits for white dwarfs with pure hydrogen or helium photospheres, a mixture of those two, and white dwarfs displaying carbon features in their spectra. We also discuss the less abundant systems in the sample, such as those with magnetic fields, and cataclysmic variables. The DESI EDR white dwarf sample is significantly less biased than the sample observed by the Sloan Digital Sky Survey, which is skewed to bluer and therefore hotter white dwarfs, making DESI more complete and suitable for performing statistical studies of white dwarfs.
KW - catalogues
KW - surveys
KW - techniques: spectroscopic
KW - white dwarfs
KW - UKRI
KW - STFC
KW - ST/Y001001/1
UR - http://www.scopus.com/inward/record.url?scp=85208120073&partnerID=8YFLogxK
U2 - 10.1093/mnras/stae2205
DO - 10.1093/mnras/stae2205
M3 - Article
AN - SCOPUS:85208120073
SN - 0035-8711
VL - 535
SP - 254
EP - 289
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 1
ER -