J/ApJ/899/83 723 Gaia DR2 White dwarfs cand. in Local Galactic Halo (Kim+, 2020)
A Catalog of 531 White Dwarf Candidates in the Local Galactic Halo from Gaia
Data Release 2.
Kim B., Lepine S., Medan I.
<Astrophys. J., 899, 83 (2020)>
=2020ApJ...899...83K 2020ApJ...899...83K
ADC_Keywords: Stars, white dwarf; Stars, halo; Parallaxes, trigonometric;
Proper motions; Colors; Photometry, G band; Spectral types
Keywords: White dwarf stars ; Catalogs ; Halo stars ; Stellar kinematics ;
Proper motions ; High-velocity stars
Abstract:
We present a catalog of 531 white dwarf candidates that have large
apparent transverse motions relative to the Sun (vT>200km/s), thus
making them likely members of the local Galactic halo population. The
candidates were selected from the Gaia Data Release 2 and are located
in a great circle with 20° width running across both Galactic
poles and the Galactic center and anticenter, a zone that spans 17.3%
of the sky. The selection used a combination of kinematic and
photometric properties, derived primarily from Gaia proper motions, G
magnitudes, and GBP-GRP color, and including parallax whenever
available. Additional validation of the white dwarf candidates is made
using PanSTARRS photometric (gri) data. Our final catalog includes not
only stars having full kinematic and luminosity estimates from
reliable Gaia parallax, but also stars with presently unreliable or no
available Gaia parallax measurements. We argue that our method of
selecting local halo objects with and without reliable parallax data
leads us to round up all possible halo white dwarfs in the Gaia
catalog (in that particular section of the sky) with recorded proper
motions >40mas/yr and that pass our vT>200km/s threshold
requirement. We expect this catalog will be useful for the study of
the white dwarf population of the local Galactic halo.
Description:
The candidates were selected from the Gaia Data Release 2 and are
located in a great circle with 20° width running across both
Galactic poles and the Galactic center and anticenter, a zone that
spans 17.3% of the sky. Additional validation of the white dwarf
candidates is made using PanSTARRS photometric (gri) data.
Here we define two general subsets of different data quality that we
call the clean subset (Set A) and the unclean subset; we further
subdivide the unclean subset into three different subsets (Sets B, C,
and D). See section 2.3 of the article for more details.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 183 217 High-velocity white dwarf candidates in set A
table3.dat 191 283 High-velocity white dwarf candidates in set B
table4.dat 138 100 White dwarf candidates in set C
table5.dat 152 123 White dwarf candidates in set D
--------------------------------------------------------------------------------
See also:
II/207 : Palomar-Green catalog UV-excess stellar objects (Green+, 1986)
III/210 : Spectroscopically Identified White Dwarfs (McCook+, 1999)
III/235 : Spectroscopically Identified White Dwarfs (McCook+, 2008)
I/337 : Gaia DR1 (Gaia Collaboration, 2016)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
VII/223 : The 2dF QSO Redshift Survey. V. The 10k catalogue (Croom+, 2001)
VII/241 : The 2dF QSO Redshift Survey (Croom+ 2004)
J/A+A/378/556 : UVES/VLT spectra of white dwarfs (Koester+, 2001)
J/other/Sci/292.698 : Candidate halo dark matter (Oppenheimer+, 2001)
J/MNRAS/335/673 : DA white dwarfs in 2dF QSO Redshift Survey (Vennes+, 2002)
J/AJ/126/1023 : White Dwarfs in the SDSS (Harris+, 2003)
J/AJ/125/1598 : New high pm stars in the northern sky (Lepine+, 2003)
J/ApJ/607/426 : Catalog of white dwarfs in SDSS-DR1 (Kleinman+, 2004)
J/A+A/448/579 : Sample of confirmed WDs in GSC-II survey (Carollo+, 2006)
J/ApJS/167/40 : SDSS4 confirmed white dwarfs catalog (Eisenstein+, 2006)
J/AJ/132/1221 : VJHK and SDSS photometry of DA white dwarfs (Holberg+, 2006)
J/AJ/131/582 : Cool white dwarfs in the SDSS (Kilic+, 2006)
J/A+A/447/173 : 3D-kinematics white dwarfs from SPY project II (Pauli+,2006)
J/AJ/133/889 : Faint companions of Hipparcos stars (Lepine+, 2007)
J/ApJS/197/38 : The WIRED survey. II. (Debes+, 2011)
J/MNRAS/417/1210 : DA-white dwarfs from SDSS and UKIDSS (Girven+, 2011)
J/ApJ/730/128 : Spectroscopy of DA WD from the SDSS-DR4 (Tremblay+, 2011)
J/AJ/141/97 : SDSS DR7 M dwarfs (West+, 2011)
J/MNRAS/429/2143 : Hidden population of AM CVns in the SDSS (Carter+, 2013)
J/ApJS/204/5 : SDSS DR7 white dwarf catalog (Kleinman+, 2013)
J/AJ/145/136 : Astrometry & photometry nearby white dwarfs (Limoges+, 2013)
J/A+A/562/A71 : Chemical abund. solar neighbourhood dwarfs (Bensby+, 2014)
J/MNRAS/445/1331 : White-dwarf + main-sequence binaries in SDSS DR9 (Li+, 2014)
J/MNRAS/454/2787 : LAMOST DR2 white dwarfs (Guo+, 2015)
J/MNRAS/446/4078 : New white dwarf stars in SDSS DR10 (Kepler+, 2015)
J/A+A/583/A86 : DB white dwarfs in SDSS DR10 and DR12 (Koester+, 2015)
J/ApJS/219/19 : Census nearby white dwarfs from SUPERBLINK (Limoges+, 2015)
J/MNRAS/455/3413 : New white dwarf & subdwarf stars in SDSS DR12 (Kepler+,2016)
J/MNRAS/458/3808 : DR9-12 SDSS WDMS binaries (Rebassa-Mansergas+, 2016)
J/A+A/616/A10 : 46 open clusters GaiaDR2 HRdiagram (Gaia Collaboration,2018)
J/ApJS/239/26 : NOFS astrometric measurements distant WDs (Leggett+, 2018)
J/A+A/625/A135 : Galac. interstellar dust Gaia-2MASS 3Dmaps (Lallement+,2019)
J/MNRAS/482/4570 : Gaia DR2 white dwarf candidates (Gentile Fusillo+, 2019)
J/ApJ/889/49 : The ELM Survey. VIII. Final double WD binaries (Brown+,2020)
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 19 I19 --- Source Gaia DR2 unique source identifier
21- 31 F11.7 deg RAdeg [0.53/359] Right Ascension (ICRS) at Ep=2015.5
33- 43 F11.7 deg DEdeg [-58.5/61.4] Declination (ICRS) at Ep=2015.5
45- 50 F6.3 mas Plx [0.33/30.4] Gaia DR2 parallax (π)
52- 56 F5.3 mas e_Plx [0.06/1.8] Gaia DR2 standard error for plx
58- 65 F8.2 mas/yr pmRA [-1020/1827] Gaia DR2 proper motion, in RA
67- 74 F8.2 mas/yr pmDE [-1486/323.6] Gaia DR2 proper motion, in DE
76- 81 F6.3 mag Gmag [13.2/20.6] Gaia G-band mean magnitude
83- 88 F6.3 mag BP-RP [-0.55/1.6] Gaia BP-RP color
90-107 I18 --- PS1 ? PanSTARRS DR1 identifier
109-114 F6.3 mag rmag [16.4/20.5]? PanSTARRS r-band magnitude
116-121 F6.3 mag g-r [-0.42/1.16]? PanSTARRS g-r color
123-128 F6.3 mag r-i [-0.38/0.45]? PanSTARRS r-i color
130-136 F7.2 km/s vT-r [-477/346] Transverse velocity in r direction
from Gaia parallax
138-144 F7.2 km/s vT-s [-652/45.2] Transverse velocity in s direction
from Gaia parallax
146-151 F6.2 km/s vT [200/725] Total transverse velocity from
Gaia parallax
153-158 F6.2 % HaloWD [50/100] Confidence level to pass the the halo
white dwarf selection expressed
160-164 A5 --- SpT Spectral type of a known white dwarf given in
the SIMBAD database
166-183 A18 --- Ref References (1)
------------------------------------------------------------------------------
Note (1): References as follows:
1 = Feige, 1958ApJ...128..267F 1958ApJ...128..267F
2 = Eggen, & Greenstein, 1958ApJ...128..267F 1958ApJ...128..267F
3 = Greenstein, 1976AJ.....81..323G 1976AJ.....81..323G
4 = Eggen & Bessell, 1978ApJ...226..411E 1978ApJ...226..411E
5 = Green, 1986, II/207
6 = McCook, & Sion, 1999, III/210
7 = Croom+, 2001, VII/223
8 = Koester+, 2001, J/A+A/378/556
9 = Oppenheimer+, 2001, J/other/Sci/292.698
10 = Lepine+, 2003, J/AJ/125/1598
11 = Croom+, 2004, VII/241
12 = Kleinman+, 2004, J/ApJ/607/426
13 = Salim+, 2004ApJ...601.1075S 2004ApJ...601.1075S
14 = Carollo+, 2006, J/A+A/448/579
15 = Eisenstein+, 2006, J/ApJS/167/40
16 = Harris+, 2006AJ....131..571H 2006AJ....131..571H
17 = Kilic+, 2006, J/AJ/131/582
18 = Pauli+, 2006, J/A+A/447/173
19 = Kawka & Vennes, 2009A&A...506L..25K 2009A&A...506L..25K
20 = Kilic+, 2010ApJ...715L..21K 2010ApJ...715L..21K
21 = Girven+, 2011, J/MNRAS/417/1210
22 = Brown+, 2012ApJ...744..142B 2012ApJ...744..142B
23 = Kleinman+, 2013, J/ApJS/204/5
24 = Li+, 2014, J/MNRAS/445/1331
25 = Kepler+, 2015, J/MNRAS/446/4078
26 = Limoges+, 2015, J/ApJS/219/19
27 = Kepler+, 2016, J/MNRAS/455/3413
28 = Leggett+, 2018, J/ApJS/239/26
29 = Kilic+, 2019MNRAS.482..965K 2019MNRAS.482..965K
30 = Kawka+, 2020MNRAS.491L..40K 2020MNRAS.491L..40K
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 19 I19 --- Source Gaia DR2 unique source identifier
21- 31 F11.7 deg RAdeg [0.40/360] Right Ascension (ICRS) at Ep=2015.5
33- 43 F11.7 deg DEdeg [-60.1/57.3] Declination (ICRS) at Ep=2015.5
45- 50 F6.3 mas Plx [0.46/28.7] Gaia DR2 parallax (π)
52- 56 F5.3 mas e_Plx [0.14/2.7] Gaia DR2 standard error plx
58- 64 F7.2 mas/yr pmRA [-447/566] Gaia DR2 proper motion, in RA
66- 73 F8.2 mas/yr pmDE [-1755/66.5] Gaia DR2 proper motion, in DE
75- 80 F6.3 mag Gmag [17.4/21] Gaia G-band mean magnitude
82- 87 F6.3 mag BP-RP [-0.9/1.5] Gaia BP-RP color
89-106 I18 --- PS1 ? PanSTARRS DR1 identifier
108-113 F6.3 mag rmag [17.7/20.9]? PanSTARRS r-band magnitude
115-120 F6.3 mag g-r [-0.51/0.91]? PanSTARRS g-r color
122-127 F6.3 mag r-i [-0.41/0.38]? PanSTARRS r-i color
129-135 F7.2 km/s vT-r [-481.6/460.3] Transverse velocity in r
direction from Gaia parallax
137-143 F7.2 km/s vT-s [-777.6/11.7] Transverse velocity in s
direction from Gaia parallax
145-150 F6.2 km/s vT [201.4/859.4] Total transverse velocity from
Gaia parallax
152-158 F7.2 pc Dist [49.17/1347]? Photometric distance
160-166 F7.2 km/s vT-phot [42.66/1137]? Total transverse velocity from
photometric distance
168-173 F6.2 % HaloWD [50/100] Confidence level to pass the the halo
white dwarf selection expressed
175-185 A11 --- SpT Spectral type of known white dwarf from SIMBAD
187-191 A5 --- Ref References (1)
--------------------------------------------------------------------------------
Note (1): References as follows:
1 = McCook & Sion, 1999, III/210
2 = Croom+, 2001, III/223
3 = Vennes+ 2002, J/MNRAS/335/673
4 = Lepine+, 2003, J/AJ/125/1598
5 = Croom+, 2004, VII/241
6 = Kleinman+, 2004, J/ApJ/607/426
7 = Eisenstein+, 2006, J/ApJS/167/40
8 = Hall+, 2008AJ....136...76H 2008AJ....136...76H
9 = Girven+, 2011, J/MNRAS/417/1210
10 = West+, 2011, J/AJ/141/97
11 = Carter+, 2013, J/MNRAS/429/2143
12 = Kleinman+, 2013, J/ApJS/204/5
13 = Kepler+, 2015, J/MNRAS/446/4078
14 = Fantin+, 2017ApJ...843...53F 2017ApJ...843...53F
15 = Kilic+, 2019MNRAS.482..965K 2019MNRAS.482..965K
16 = Zhang, 2019MNRAS.489.1423Z 2019MNRAS.489.1423Z
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 19 I19 --- Source Gaia DR2 unique source identifier
21- 31 F11.7 deg RAdeg [3.68/358.1] Right Ascension (ICRS) at Ep=2015.5
33- 43 F11.7 deg DEdeg [-30.6/57.8] Declination (ICRS) at Ep=2015.5
45- 51 F7.2 mas/yr pmRA [-237.9/119.2] Gaia DR2 proper motion in RA
53- 59 F7.2 mas/yr pmDE [-189.1/62.8] Gaia DR2 proper motion in DE
61- 66 F6.3 mag Gmag [18.9/21] Gaia G-band mean magnitude
68- 73 F6.3 mag BP-RP [-0.45/1.41] Gaia BP-RP color
75- 92 I18 --- PS1 PanSTARRS DR1 identifier
94- 99 F6.3 mag rmag [18.5/21] PanSTARRS r-band magnitude
101-106 F6.3 mag g-r [-0.47/1] PanSTARRS g-r color
108-113 F6.3 mag r-i [-0.39/0.39] PanSTARRS r-i color
115-115 A1 --- Status Halo status of white dwarf candidates
117-122 F6.2 % WD [29.2/100] Confidence level to pass the white
dwarf selection
124-129 F6.2 % HaloWD [0/100] Confidence level to pass the the halo
white dwarf selection expressed
131-133 A3 --- SpT Spectral type of a known white dwarf from SIMBAD
135-138 A4 --- Ref References (1)
--------------------------------------------------------------------------------
Note (1): References as follows
1 = Eisenstein+, 2006, J/ApJS/167/40
2 = Kleinman, 2013, J/ApJS/204/5
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 19 I19 --- Source Gaia DR2 unique source identifier
21- 31 F11.7 deg RAdeg [5.27/331.9] Right Ascension (ICRS) at Ep=2015.5
33- 43 F11.7 deg DEdeg [-28.9/59.1] Declination (ICRS) at Ep=2015.5
45- 51 F7.3 mas Plx [-11.45/21.55] Gaia DR2 parallax (π)
53- 57 F5.3 mas e_Plx [0.05/2.5] Gaia DR2 standard error of plx
59- 65 F7.2 mas/yr pmRA [-400.2/119.1] Gaia DR2 proper motion in RA
67- 73 F7.2 mas/yr pmDE [-426.5/287.9] Gaia DR2 proper motion in DE
75- 80 F6.3 mag Gmag [15.5/21] Gaia G-band mean magnitude
82- 99 I18 --- PS1 PanSTARRS DR1 identifier
101-106 F6.3 mag rmag [15/20.9] PanSTARRS r-band magnitude
108-113 F6.3 mag g-r [-0.35/2.27] PanSTARRS g-r color
115-120 F6.3 mag r-i [-1.33/0.41] PanSTARRS r-i color
122-122 A1 --- Status Halo status of white dwarf candidates
124-129 F6.2 % WD [60/100] Confidence level to pass the white
dwarf selection
131-136 F6.2 % HaloWD [0/100] Confidence level to pass the the halo
white dwarf selection expressed
138-142 A5 --- SpT Spectral type of a known white dwarf from SIMBAD
144-152 A9 --- Ref References (1)
--------------------------------------------------------------------------------
Note (1): References as follows:
1 = McCook, & Sion, 1999, III/210
2 = Debes+, 2011, J/ApJS/197/38
3 = Girven+, 2011, J/MNRAS/417/1210
4 = Kleinman+, 2013, J/ApJS/204/5
5 = Guo+, 2015, J/MNRAS/454/2787
6 = Kepler+, 2015, J/MNRAS/446/4078
7 = Koester & Kepler, 2001, J/A+A/378/556
8 = Limoges+, 2015, J/ApJS/219/19
9 = Dame+, 2016MNRAS.463.2453D 2016MNRAS.463.2453D
10 = Kepler+, 2016, J/MNRAS/455/3413
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 15-Oct-2021