J/ApJS/219/19 Census of nearby white dwarfs from SUPERBLINK (Limoges+, 2015)
Physical properties of the current census of northern white dwarfs within 40pc
of the Sun.
Limoges M.-M., Bergeron P., Lepine S.
<Astrophys. J. Suppl. Ser., 219, 19 (2015)>
=2015ApJS..219...19L 2015ApJS..219...19L (SIMBAD/NED BibCode)
ADC_Keywords: Stars, white dwarf ; Stars, distances ; Photometry, SDSS ;
Photometry, infrared ; Proper motions ; Spectral types ;
Stars, masses ; Effective temperatures
Keywords: solar neighborhood; stars: distances; stars: fundamental parameters;
stars: luminosity function, mass function; surveys; white dwarfs
Abstract:
We present a detailed description of the physical properties of our
current census of white dwarfs within 40pc of the Sun, based on an
exhaustive spectroscopic survey of northern hemisphere candidates from
the SUPERBLINK proper motion database. Our method for selecting white
dwarf candidates is based on a combination of theoretical
color-magnitude relations and reduced proper motion diagrams. We
reported in an earlier publication the discovery of nearly 200 new
white dwarfs, and we present here the discovery of an additional 133
new white dwarfs, among which we identify 96 DA, 3 DB, 24 DC, 3 DQ,
and 7 DZ stars. We further identify 178 white dwarfs that lie within
40pc of the Sun, representing a 40% increase of the current census,
which now includes 492 objects. We estimate the completeness of our
survey at between 66% and 78%, allowing for uncertainties in the
distance estimates. We also perform a homogeneous model atmosphere
analysis of this 40pc sample and find a large fraction of massive
white dwarfs, indicating that we are successfully recovering the more
massive, and less luminous objects often missed in other surveys. We
also show that the 40pc sample is dominated by cool and old white
dwarfs, which populate the faint end of the luminosity function,
although trigonometric parallaxes will be needed to shape this part of
the luminosity function more accurately. Finally, we identify 4
probable members of the 20pc sample, 4 suspected double degenerate
binaries, and we also report the discovery of two new ZZ Ceti
pulsators.
Description:
In Paper I (Limoges+, 2013, J/AJ/145/136), we compiled a list of 1341
white dwarf candidates within 40pc of the Sun -but likely extending to
55pc given the uncertainties- and reported spectroscopic observations
for 422 objects from this target list, including 192 new white dwarf
identifications.
The spectroscopic observing log of our earlier survey is presented in
Table 2 of Paper I. Since then, additional optical spectra have been
obtained with the Steward Observatory 2.3m telescope and the NOAO
Mayall 4 and 2.1m telescopes during 7 different observing campaigns
between 2011 January and 2013 October. A few of the brightest
candidates were also observed in spectroscopy with the 1.6m
Mont-Megantic Observatory, while ∼60hr with the Gemini North and South
8m telescopes were used to observe our faintest candidates (V∼17-18).
The adopted configurations allow a spectral coverage of
λ∼3200-5300Å and ∼3800-6700Å, at an intermediate
resolution of ∼6Å FWHM.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 81 133 Spectroscopically confirmed new white dwarfs
from SUPERBLINK - astrometry
table3.dat 97 325 Spectroscopically confirmed white dwarfs from
SUPERBLINK - photometry
table4.dat 99 325 Atmospheric parameters of new white dwarfs
from SUPERBLINK
table5.dat 112 492 Atmospheric parameters of northern white dwarfs
within 40pc of the Sun
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See also:
III/235 : Spectroscopically Identified White Dwarfs (McCook+, 2008)
I/298 : LSPM-North Catalog (Lepine+ 2005)
II/299 : GD blue stars from Lowell proper motion survey (Giclas+ 1980)
J/MNRAS/446/4078 : New white dwarf stars in SDSS DR10 (Kepler+, 2015)
J/AJ/147/129 : White dwarfs within 25pc of the Sun (Sion+, 2014)
J/ApJS/204/5 : SDSS DR7 white dwarf catalog (Kleinman+, 2013)
J/MNRAS/435/2077 : Properties of Sirius-like binary systems (Holberg+, 2013)
J/ApJ/765/12 : Carbon stars & DQ white dwarfs from SDSS-DR7+DR8 (Green, 2013)
J/AJ/145/136 : Astrometry & phot. of nearby white dwarfs (Limoges+, 2013)
J/AJ/145/102 : Bright M dwarfs spectroscopy in northern sky (Lepine+, 2013)
J/AJ/143/103 : New white dwarfs (Sayres+, 2012)
J/AJ/143/50 : White dwarfs in 47 Tuc (NGC 104) with HST (Woodley+, 2012)
J/ApJ/760/26 : DA white dwarfs infrared photometry (Barber+, 2012)
J/ApJ/743/138 : Spectroscopic survey of bright white dwarfs (Gianninas+, 2011)
J/AJ/142/138 : All-sky catalog of bright M dwarfs (Lepine+, 2011)
J/ApJ/730/128 : Spectroscopy of DA WD from the SDSS-DR4 (Tremblay+, 2011)
J/ApJS/190/77 : Detailed analysis of cool WDs in the SDSS (Kilic+, 2010)
J/MNRAS/402/620 : SDSS WD main-sequence binaries (Rebassa-Mansergas+, 2010)
J/A+A/505/441 : UVES/VLT spectra of white dwarfs (Koester+, 2009)
J/AJ/135/1225 : Parameters of the local white dwarfs (Holberg+, 2008)
J/MNRAS/382/515 : SDSS ultracool and halo WD candidates (Vidrih+, 2007)
J/A+A/470/1079 : UVES/VLT spectroscopy of white dwarfs (Voss+, 2007)
J/ApJ/663/1291 : DZ stars in SDSS DR4 (Dufour+, 2007)
J/AJ/132/1221 : VJHK and SDSS photometry of DA white dwarfs (Holberg+, 2006)
J/ApJ/643/402 : Cool white dwarfs in the solar neighborhood (Kawka+, 2006)
J/AJ/131/582 : Cool white dwarfs in the SDSS (Kilic+, 2006)
J/ApJS/167/40 : SDSS4 confirmed white dwarfs catalog (Eisenstein+, 2006)
J/ApJS/156/47 : DA white dwarfs from the Palomar Green Survey (Liebert+, 2005)
J/AJ/124/1190 : Northern high proper motion stars in DSS (Lepine+, 2002)
J/A+A/378/556 : UVES/VLT spectra of white dwarfs (Koester+, 2001)
J/ApJS/133/413 : BVRIJHK photometry of cool white dwarfs (Bergeron+, 2001)
http://www.astronomy.villanova.edu/WDCatalog/ : White dwarf catalog
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- PM Primary identifier (HHMMm+DDMMW; J2000)
13- 17 I5 --- NLTT ? The NLTT identifier
19- 37 A19 --- SDSS The SDSS identifier (JHHMMSS.ss+DDMMSS.s)
39- 40 I2 h RAh Hour of Right Ascension (J2000)
42- 43 I2 min RAm Minute of Right Ascension (J2000)
45- 49 F5.2 s RAs Second of Right Ascension (J2000)
51 A1 --- DE- [+] Sign of the Declination (J2000)
52- 53 I2 deg DEd Degree of Declination (J2000)
55- 56 I2 arcmin DEm Arcminute of Declination (J2000)
58- 61 F4.1 arcsec DEs Arcsecond of Declination (J2000)
63- 67 F5.3 arcsec/yr pm [0.05/1.8] Total proper motion
69- 74 F6.3 arcsec/yr pmRA [-0.9/1] Proper motion along RA
76- 81 F6.3 arcsec/yr pmDE [-1.4/0.2] Proper motion along DE
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- PM Primary identifier (HHMMm+DDMMW; J2000)
13- 17 F5.2 mag FUVmag [13.4/24]? GALEX/FUV band magnitude
19- 23 F5.2 mag NUVmag ? GALEX/NUV band magnitude
25- 28 F4.1 mag BFmag [13.2/21]? The USNO-B1 BF plate magnitude
30- 33 F4.1 mag RImag ? The USNO-B1 RI plate magnitude
35- 38 F4.1 mag INmag [11.4/18.4]? The USNO-B1 IN plate magnitude
40- 44 F5.2 mag Jmag [11.3/17]? 2MASS J band magnitude
46- 50 F5.2 mag Hmag ? 2MASS H band magnitude
52- 56 F5.2 mag Ksmag [9.7/17.4]? 2MASS Ks band magnitude
58- 62 F5.2 mag umag [14/22.4]? SDSS u band magnitude
64- 68 F5.2 mag gmag ? SDSS g band magnitude
70- 74 F5.2 mag rmag ? SDSS r band magnitude
76- 80 F5.2 mag imag [14/18.8]? SDSS i band magnitude
82- 86 F5.2 mag zmag [12.8/18.3]? SDSS z band magnitude
88- 92 A5 --- SpT MK spectral type of the white dwarf
94- 97 A4 --- n_PM Note(s) on ID (1)
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Note (1): Note as follows:
1 = WD in McCook and Sion (III/235).
2 = Also in Schilbach & Roser (2012A&A...537A.129S 2012A&A...537A.129S).
3 = Also in Vennes et al. (2011MNRAS.410.2095V 2011MNRAS.410.2095V).
4 = SDSS spectrum.
5 = Also in Sayres et al. (2012, J/AJ/143/103).
6 = Also in Kilic et al. (2010, J/ApJS/190/77).
7 = DA+dM in Rebassa-Mansergas et al. (2010, J/MNRAS/402/620).
8 = Also in Tonry et al. (2012ApJ...745...42T 2012ApJ...745...42T).
9 = LSPM J1227+3150 wrongly identified as PM I12273+3150
in Limoges et al. (2013, J/AJ/145/136).
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- PM Primary identifier (HHMMm+DDMMW; J2000)
13- 17 A5 --- SpT MK spectral type
19- 23 I5 K Teff [3620/52250] Effective temperature
25- 28 I4 K e_Teff ? Uncertainty in Teff
30- 33 F4.2 [cm/s2] log(g) [6.8/9] Log surface gravity
35- 38 F4.2 [cm/s2] e_log(g) Uncertainty in log(g)
40- 43 F4.2 Msun Mass [0.1/1.2] Mass
45- 48 F4.2 Msun e_Mass [0.02/0.3] Uncertainty in Mass
50- 51 A2 --- Comp Composition type ("H" or "He")
53- 57 F5.2 mag VMag [8.5/51.6] Absolute V band magnitude
59- 63 F5.2 [Lsun] logL [-4.7/0.4] Log luminosity
65- 69 F5.1 pc Dist [13/267] Distance
71- 74 F4.1 pc e_Dist [0.3/91] Uncertainty in Dist
76- 80 F5.2 [yr] logtau [6/10] Log white dwarf cooling time
82 I1 --- Fit Fit type (1=spectroscopic; 2=photometric)
84- 99 A16 --- OName Other name (SDSS name unless noted otherwise)
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 A11 --- PM Primary identifier (HHMMm+DDMMW; J2000)
13 A1 --- f_PM [*] Indicates ID is new WD from this survey
15- 21 A7 --- SpT MK spectral type
23- 27 I5 K Teff [2970/26100] Effective temperature
29- 32 I4 K e_Teff ? Uncertainty in Teff
34- 37 F4.2 [cm/s2] log(g) [7/9.2] Log surface gravity
39- 42 F4.2 [cm/s2] e_log(g) Uncertainty in log(g)
44- 47 F4.2 Msun Mass [0.1/1.3] Mass
49- 52 F4.2 Msun e_Mass Uncertainty in Mass
54- 55 A2 --- Comp Composition type ("H" or "He")
57- 61 F5.2 mag VMag [7/51.6] Absolute V band magnitude
63- 67 F5.2 [Lsun] logL [-4.8/-1.1] Log luminosity
69- 72 F4.1 pc Dist [3.5/50.1] Distance
74- 77 F4.1 pc e_Dist [0/45] Uncertainty in Dist
79- 83 F5.1 mas plx [20/285]? Parallax
85- 88 F4.1 mas e_plx [0.3/11]? Uncertainty in plx
90- 94 F5.2 [yr] logtau [7/10] Log white dwarf cooling time
96 I1 --- Fit Fit type (1=spectroscopic; 2=photometric.)
98-107 A10 --- WD White dwarf name (HHMM+DDd; B1950)
109-112 A4 --- Notes Additional notes (1)
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Note (1): Note as follows:
1 = Double degenerate binary (or candidate).
2 = Gianninas et al. (2011, J/ApJ/743/138).
3 = Dist from Vennes & Kawka (2012ApJ...745L..12V 2012ApJ...745L..12V).
4 = DXP+DA: Teff, log(g) and Dist come from
Liebert et al. (1993ApJ...418..426L 1993ApJ...418..426L) and belong to the DA component;
the values given for the companion are
Teff=(16000±2000)K and log(g)=8.5±0.2.
5 = Trigonometric parallax from Dahn et al. (1982AJ.....87..419D 1982AJ.....87..419D).
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Acknowledgements:
Pierre Bergeron [Montreal University] for the coordinates of
several objects in table 5.
References:
Limoges et al. Paper I. 2013AJ....145..136L 2013AJ....145..136L Cat. J/AJ/145/136
History:
* 30-Aug-2015: electronic publication (tables 2-5 in machine-readable form)
* 28-Oct-2015: First online version with
complete SDSS identifiers in table 2.
(End) Prepared by [AAS), Emmanuelle Perret [CDS] 24-Sep-2015