J/MNRAS/507/4646 SDSS DR16 white dwarf and subdwarf stars (Kepler+, 2021)
White dwarf and subdwarf stars in the Sloan Digital Sky Survey Data Release 16.
Kepler S.O., Koester D., Pelisoli I., Romero A.D., Ourique G.
<Mon. Not. R. Astron. Soc.,, 507, 4646-4660 (2021)>
=2021MNRAS.507.4646K 2021MNRAS.507.4646K (SIMBAD/NED BibCode)
ADC_Keywords: Stars, subdwarf ; Stars, white dwarf ; Photometry, SDSS ;
Optical ; Stars, distances
Keywords: catalogues - subdwarfs - white dwarfs
Abstract:
White dwarfs are the end state of the evolution of more than 97 per
cent of all stars, and therefore carry information on the structure
and evolution of the Galaxy through their luminosity function and
initial-to-final mass relation. Examining the new spectra of all white
or blue stars in the Sloan Digital Sky Survey Data Release 16, we
report the spectral classification of 2410 stars, down to our
identification cut-off of signal-to-noise ratio equal to three. We
newly identify 1404 DAs, 189 DZs, 103 DCs, 12 DBs, and nine CVs. The
remaining objects are a mix of carbon or L stars (dC/L), narrow-lined
hydrogen-dominated stars (sdA), dwarf F stars, and P Cyg objects. As
white dwarf stars were not targeted by SDSS DR16, the number of new
discoveries is much smaller than in previous releases. We also report
atmospheric parameters and masses for a subset consisting of 555 new
DAs, 10 new DBs, and 85 DZs for spectra with signal-to-noise ratio
larger than 10.
Description:
We extended our search for new spectroscopically confirmed white dwarf
and subdwarf stars to SDSS DR16. The SDSS flux calibration is based on
hundreds of comparison stars and in general more accurate than those
derived from single night observations. We fit the spectra of the
highest signal-to-noise for each star, taking into account that SDSS
reobserves fields and improves the quality of the spectra.
The total number of unique stars in Kleinman et al.
(2013ApJS..204....5K 2013ApJS..204....5K, Cat. J/ApJS/204/5), Kepler et al.
(2015MNRAS.446.4078K 2015MNRAS.446.4078K, Cat. J/MNRAS/446/4078, 2016MNRAS.455.3413K 2016MNRAS.455.3413K, Cat.
J/MNRAS/455/3413, 2019MNRAS.486.2169K 2019MNRAS.486.2169K, Cat. J/MNRAS/486/2169), and
this paper is 30086 DAs, 2390 DCs, 2160 DBs, 1316 DZs, 572 DQs, 137
DOs, 4 DS, 396 sdB, 410 sdOs, and 363 CVs, i.e. DAs correspond to 82
per cent of the white dwarfs with SDSS spectra, excluding subdwarfs
and CVs.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 283 2410 Spectral classification for 2410 white dwarfs
and subdwarfs in SDSS DR16.
table3.dat 112 555 Atmospheric parameters for DAs with (S/N)≥10
and parallax/uncertainty≥4
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See also:
V/154 : Sloan Digital Sky Surveys (SDSS), Release 16 (DR16)
(Ahumada+, 2020)
J/ApJS/204/5 : SDSS DR7 white dwarf catalog (Kleinman+, 2013)
J/MNRAS/446/4078 : New white dwarf stars in SDSS DR10 (Kepler+, 2015)
J/MNRAS/455/3413 : New white dwarf and subdwarf stars in SDSS DR12
(Kepler+, 2016)
J/MNRAS/486/2169 : White dwarf and subdwarf stars in SDSS DR14 (Kepler+, 2019)
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 19 A19 --- Name SDSS J name (HHMMSS.ss+DDMMSS.s)
21- 36 A16 --- P-M-F SDSS Plate-MJD-Fiber
38- 40 I3 --- S/Ng g-band signal-to-noise ratio
42- 47 F6.3 mag umag SDSS u magnitude
49- 53 F5.3 mag e_umag SDSS u magnitude error
55- 60 F6.3 mag gmag SDSS g magnitude
62- 66 F5.3 mag e_gmag SDSS g magnitude error
68- 73 F6.3 mag rmag SDSS r magnitude
75- 79 F5.3 mag e_rmag SDSS r magnitude error
81- 86 F6.3 mag imag SDSS i magnitude
88- 92 F5.3 mag e_imag SDSS i magnitude error
94- 99 F6.3 mag zmag SDSS z magnitude
101-105 F5.3 mag e_zmag SDSS z magnitude error
107-111 F5.3 mag E(B-V) Reddening E(B-V)
113-117 F5.1 mas/yr PM Total proper motion
119-123 F5.1 deg GLON Galactic longitude
125-129 F5.1 deg GLAT Galactic latitude
131-137 F7.3 mas plx2 ?=- Gaia DR2 parallax
139-143 F5.3 mas e_plx2 ?=- Gaia DR2 parallax error
145-151 F7.3 mas/yr PM2 ?=- GaiaDR2 total proper motion
153-159 F7.4 mag Gmag2 Gaia DR2 G magnitude
161-166 F6.3 mag BP-RP2 ?=- Gaia DR2 BP-RP colour
168-173 F6.3 mag GMAG ?=- Absolute G magnitude
175-181 F7.3 mas plx3 ?=- Gaia DR3 parallax
183-189 F7.3 mas e_plx3 ?=- Gaia DR3 parallax error
191-195 I5 mas/yr PM3 ?=- Gaia DR3 Total proper motion
197-202 F6.2 --- RUWE ?=- Gaia DR3 RUWE
204-209 F6.3 mag Gmag ?=- Gaia DR3 G magnitude
211-215 F5.1 e-/s e_FG ?=- Gaia DR3 error on G-band mean flux
217-222 F6.3 mag BPmag ?=- Gaia DR3 BP magnitude
224-228 F5.1 e-/s e_FBP ?=- Gaia DR3 error on BP-band mean flux
230-235 F6.3 mag RPmag ?=- Gaia DR3 RP magnitude
237-242 F6.3 mag BP-RP ?=- Gaia DR3 BP-RP colour
244-248 F5.3 kpc Dist ?=- Distance
250-283 A34 --- Type Spectral classification
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 16 A16 --- P-M-F SDSS Plate-MJD-Fiber
18- 36 A19 --- Name SDSS J name (HHMMSS.ss+DDMMSS.s)
38- 42 I5 K Teff Effective temperature
44- 47 I4 K e_Teff Effective temperature error
49- 53 F5.3 [cm/s2] logg Surface gravity
55- 59 F5.3 [cm/s2] e_logg Surface gravity error
61- 64 I4 km/s RV Radial velocity
66- 67 I2 km/s e_RV Radial velocity error
69- 72 F4.1 --- SN Signal-to-noise ratio
74- 78 F5.3 --- chi2 chi2 value
80- 83 I4 pc Dist Distance
85- 88 I4 pc Z Height above the plane
90- 94 F5.3 mag E(B-V) Reddening E(B-V)
96-100 F5.3 0.1nm Rl Vacuum wavelength (Rλ)
102-106 F5.3 Msun Mass Mass
108-112 F5.3 Msun e_Mass Mass error
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 17-Sep-2024