J/ApJ/902/127 Bright Gaia white dwarfs with unWISE photometry (Xu+, 2020)
Infrared excesses around bright white dwarfs from Gaia and unWISE. I.
Xu S., Lai S., Dennihy E.
<Astrophys. J., 902, 127-127 (2020)>
=2020ApJ...902..127X 2020ApJ...902..127X (SIMBAD/NED BibCode)
ADC_Keywords: Stars, white dwarf ; Photometry, infrared
Keywords: circumstellar disks - white dwarf stars - brown dwarfs
Abstract:
Studies of excess infrared radiation around white dwarfs provide
important constraints on the evolution of planetary systems and
low-mass companions beyond the main-sequence stage. In this paper
series, we focus on identifying and characterizing bright white dwarfs
with an infrared excess. Here, we present 188 infrared excess
candidates from Gaia and unWISE, 147 of which are new discoveries.
Further characterization of this sample can significantly increase the
current list of white dwarf debris disks and white dwarfs with
low-mass companions.
Description:
We searched for infrared excesses around 2847 bright Gaia white dwarf
candidates (G<17.0mag) using the unWISE catalog.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 143 2847 Bright Gaia white dwarfs with reliable unWISE
photometry (updated version, 29-Jun-2021)
table4.dat 185 179 179 white dwarfs that may have contaminated
unWISE photometry (Sample C)
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See also:
II/363 : The band-merged unWISE Catalog (Schlafly+, 2019)
J/MNRAS/482/4570 : Gaia DR2 white dwarf candidates (Gentile Fusillo+, 2019)
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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- 13 F13.9 deg RAdeg Right Ascension (ICRS) at Ep=2015.5
from Gaia DR2
15- 27 F13.9 deg DEdeg Declination (ICRS) at Ep=2015.5 from Gaia DR2
29- 33 F5.2 mag W1mag unWISE band 1 magnitude (1)
35- 38 F4.2 mag e_W1mag Uncertainty in W1mag (1)
40- 44 F5.2 mag W2mag unWISE band 2 magnitude (1)
46- 49 F4.2 mag e_W2mag Uncertainty in W2mag (1)
51- 57 F7.3 --- chiW1 magnitude excess parameter for unWISE band 1,
chi-W1, Eq. 1
59- 65 F7.3 --- chiW2 magnitude excess parameter for unWISE band 2,
chi-W2, Eq. 1
67- 72 F6.3 --- sigmaW12 Color excess parameter, Eq. 2
74- 82 A9 --- Exs Excess type
84- 88 I5 K Teff White dwarf effective temperature (2)
90- 93 F4.2 [cm/s2] logg White dwarf surface gravity (2)
95- 98 F4.2 Msun M White dwarf mass, solar units (2)
100-108 A9 --- SpType White dwarf spectral type, SIMBAD
110-143 A34 --- Catalog Detected catalog(s)
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Note (1): unWISE magnitudes and uncertainties from Schlafly et al.
(2019ApJS..240...30S 2019ApJS..240...30S. Cat. II/363).
Note (2): White dwarf parameters (Teff, logg, M) are from Gentile Fusillo et al.
(2019MNRAS.482.4570G 2019MNRAS.482.4570G, Cat. J/MNRAS/482/4570), which is derived from
evolutionary models with carbon and oxygen cores and a pure hydrogen
atmosphere.
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Byte-by-byte Description of file: dat table4.dat
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Bytes Format Units Label Explanations
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1- 10 F10.6 deg RAdeg Right ascension (ICRS) at Ep=2015.5
from Gaia DR2
12- 21 F10.6 deg DEdeg Declination (ICRS) at Ep=2015.5 from Gaia DR2
23- 27 F5.2 mag W1mag unWISE band 1 magnitude (1)
29- 32 F4.2 mag e_W1mag Uncertainty in W1mag (1)
34- 38 F5.2 mag W2mag unWISE band 2 magnitude (1)
40- 43 F4.2 mag e_W2mag Uncertainty in W2mag (1)
45- 50 F6.2 --- chiW1 Magnitude excess parameter for unWISE band 1,
chi-W1, Eq. 1
52- 57 F6.2 --- chiW2 Magnitude excess parameter for unWISE band 2,
chi-W2, Eq. 1
59- 63 F5.2 --- sigmaW12 Color excess parameter, Eq. 2
65- 80 A16 --- Exs Excess type
81- 85 I5 K Teff White dwarf effective temperature (2)
87- 90 F4.2 [cm/s2] logg White dwarf surface gravity (2)
92- 95 F4.2 Msun M White dwarf mass, solar units (2)
97-105 A9 --- SpType White dwarf spectral type, SIMBAD
107-140 A34 --- Catalog Detected catalog(s) (3)
143-165 A23 --- WD WD name (WDJHHMMSS.ss+DDMMSS.ss, J2000) (4)
167-185 I19 --- GaiaDR2 GaiaDR2 identifier (4)
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Note (1): unWISE magnitudes and uncertainties from Schlafly et al.
(2019ApJS..240...30S 2019ApJS..240...30S, Cat. II/363).
Note (2): White dwarf parameters (Teff, logg, M) are from Gentile Fusillo et al.
(2019MNRAS.482.4570G 2019MNRAS.482.4570G, Cat. J/MNRAS/482/4570), which is derived from
evolutionary models with carbon and oxygen cores and a pure hydrogen
atmosphere.
Note (3): Catalogs are Gaia, SDSS, UHS, VHS, VIKING, UKIDSS and unWISE.
Note (4): WD name and GaiaDR2 identifier added by CDS from
Gentile Fusillo et al. (2019MNRAS.482.4570G 2019MNRAS.482.4570G, Cat. J/MNRAS/482/4570)
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Acknowledgements:
Siyi Xu, sxu(at)gemini.edu
History:
09-Nov-2020: on-line version
28-Jun-2021: updated table3 (from author)
29-Jun-2021: corrected table3 (from author)
(End) Siyi Xu [Gemini Observatory], Patricia Vannier [CDS] 06-Nov-2020