J/MNRAS/486/2169 White dwarf and subdwarf stars in SDSS DR14 (Kepler+, 2019)
White dwarf and subdwarf stars in the Sloan Digital Sky Survey Data Release 14.
Kepler S.O., Pelisoli I., Koester D., Reindl N., Geier S., Romero A.D.,
Ourique G., De Paula Oliveira C., Amaral L.A.
<Mon. Not. R. Astron. Soc., 486, 2169-2183 (2019)>
=2019MNRAS.486.2169K 2019MNRAS.486.2169K (SIMBAD/NED BibCode)
ADC_Keywords: Stars, dwarfs ; Stars, subdwarf ; Stars, white dwarf ;
Photometry, SDSS ;
Keywords: catalogues - subdwarfs - white dwarfs -
stars: fundamental parameters - cataclysmic variables
Abstract:
White dwarfs carry information on the structure and evolution of the
Galaxy, especially through their luminosity function and
initial-to-final mass relation. Very cool white dwarfs provide insight
into the early ages of each population. Examining the spectra of all
stars with 3σ proper motion in the Sloan Digital Sky Survey Data
Release 14, we report the classification for 20088 spectroscopically
confirmed white dwarfs, plus 415 hot subdwarfs, and 311 cataclysmic
variables. We obtain Teff, logg, and mass for hydrogen atmosphere
white dwarf stars (DAs), warm helium atmosphere white dwarfs (DBs),
hot subdwarfs (sdBs and sdOs), and estimate photometric Teff for white
dwarf stars with continuum spectra (DCs). We find 15793 sdAs and 447
dCs between the white dwarf cooling sequence and the main sequence,
especially below Teff~=10000K; most are likely low-mass metal-poor
main-sequence stars, but some could be the result of interacting
binary evolution.
Description:
We extended our search of white dwarf and subdwarf stars to SDSS DR14.
In addition to searching all spectra with significant proper motion
for new white dwarfs, we also fitted known DAs and DBs that fell in
our selection criteria. The SDSS flux calibration is based on hundreds
of comparison stars and in general more accurate than those derived
from single night observations. We fitted the spectra of highest S/N
for each star, taking into account that SDSS re-observes fields and
improves the quality of the spectra. Our classifications are
independent from previous classifications, and should be considered
improvements.
Of the total 37053 objects in our Table 2, only 6 per cent come from
plates obtained after DR12, but only 13927 are in the SDSS DR 7 to DR
12 catalogues. The DR7 to DR12 catalogues contain 35590 stars,
including 29262 DAs, so our catalogues are not a subset or complete
sets, but complementary. 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), and this DR14 catalogue is 52299, with 28681 DAs,
2287 DCs, 2148 DBs, 1126 DZs, 572 DQs, 137 DOs, 4 DS, 396 sdB, 410
sdOs, and 324 CVs.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 162 37409 Spectral classification
table3.dat 250 15472 Parameters from spectral fitting to atmospheric
models for DAs
table5.dat 187 130 Table of hot subdwarfs
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See also:
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)
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 16 A16 --- P-M-F Plate-MJD-Fiber
18- 36 A19 --- SDSSJ SDSS J name (HHMMSS.ss+DDMMSS.ss)
38- 40 I3 --- SNg ?=- Signal-to-noise ration in g band
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- 93 F6.3 mag e_imag ?=- SDSS i magnitude error
95-100 F6.3 mag zmag ?=- SDSS z magnitude
102-107 F6.3 mag e_zmag ?=- SDSS z magnitude error
109-113 F5.3 mag E(B-V) ?=- Reddening E(B-V)
115-120 F6.1 mas/yr PM ?=- Total proper motion
122-126 F5.1 deg GLON [0/360]?=- Galactic longitude
128-132 F5.1 deg GLAT ?=- Galactic latitude
134-162 A29 --- Type Type
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Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 16 A16 --- P-M-F Plate-MJD-Fiber
18- 36 A19 --- SDSSJ SDSS J name (HHMMSS.ss+DDMMSS.ss)
38- 40 I3 --- SNg Signal-to-noise ration in g band
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)
113-118 F6.1 mas/yr PM ?=- Total proper motion
120-124 F5.1 deg GLON [0/360]?=- Galactic longitude
126-130 F5.1 deg GLAT ?=- Galactic latitude
132-140 A9 --- Type Type
142-147 I6 K Teff Effective temperature
149-153 I5 K e_Teff Effective temperature error
155-159 F5.3 [cm/s2] logg Surface gravity
161-165 F5.3 [cm/s2] e_logg Surface gravity error
167-170 I4 km/s RV ?=0 Radial velocity
172-175 I4 km/s e_RV ?=0 Radial velocity error
177-179 I3 --- S/N ?=0 signal-to-noise ratio
181-185 I5 --- DT(SP) ?=0 Unexplained parameter
187-191 I5 pc d ?=0 Distance
193-197 I5 pc z ?=0 Height above the plane
199-203 F5.3 Msun Mass ?=0 Mass (with ML2/alpha=0.7 model)
205-209 F5.3 Msun e_Mass ?=0 Mass error
211-216 I6 K Teff3D Temperature corrected with 3D calculation
218-222 F5.3 [cm/s2] logg3D Surface gravity corrected with
3D calculation
224-227 I4 --- DTeff Difference in effective temperature
(Teff3D-Teff)
229-234 F6.3 [cm/s2] Dlogg Difference in surface gravity
(logg-logg3D)
236-242 F7.5 Msun Mass3D Mass corrected with 3D calculation
244-250 F7.5 Msun e_Mass3D Mass corrected with 3D calculation error
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Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 16 A16 --- P-M-F Plate-MJD-Fiber
18- 36 A19 --- SDSSJ SDSS J name (HHMMSS.ss+DDMMSS.ss)
38- 45 A8 --- Type Type
47- 51 I5 K Teff Effective temperature
53- 56 I4 K e_Tefffit Effective temperature error
from fit
58- 61 I4 K e_Tefftot Effective temperature total error
63- 66 F4.2 [cm/s2] logg Surface gravity
68- 71 F4.2 [cm/s2] e_loggfit Surface gravity error from fit
73- 76 F4.2 [cm/s2] e_loggtot Surface gravity total error
78- 82 F5.2 --- logn(He)/n(H) Abundance ratio logn(He)/n(H)
84- 87 F4.2 --- e_logn(He)/n(H)fit ? Abundance ratio logn(He)/n(H)
error from fit
89- 92 F4.2 --- e_logn(He)/n(H)tot ? Abundance ratio logn(He)/n(H)
total error
94- 96 A3 --- New [New]
98- 99 I2 --- SNg Signal-to-noise ration in g band
101-106 F6.3 mag umag SDSS u magnitude
108-112 F5.3 mag e_umag SDSS u magnitude error
114-119 F6.3 mag gmag SDSS g magnitude
121-125 F5.3 mag e_gmag SDSS g magnitude error
127-132 F6.3 mag rmag SDSS r magnitude
134-138 F5.3 mag e_rmag SDSS r magnitude error
140-145 F6.3 mag imag SDSS i magnitude
147-151 F5.3 mag e_imag SDSS i magnitude error
153-158 F6.3 mag zmag SDSS z magnitude
160-164 F5.3 mag e_zmag SDSS z magnitude error
166-170 F5.3 mag E(B-V) Reddening E(B-V)
172-175 F4.1 mas/yr PM Total proper motion
177-181 F5.1 deg GLON Galactic longitude
183-187 F5.1 deg GLAT Galactic latitude
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 29-Aug-2022