J/ApJS/197/38 The WIRED survey. II. (Debes+, 2011)
The WIRED survey.
II. Infrared excesses in the SDSS DR7 white dwarf catalog.
Debes J.H., Hoard D.W., Wachter S., Leisawitz D.T., Cohen M.
<Astrophys. J. Suppl. Ser., 197, 38 (2011)>
=2011ApJS..197...38D 2011ApJS..197...38D
ADC_Keywords: Photometry, infrared ; Spectral types ; Effective temperatures ;
Stars, white dwarf ; Photometry, SDSS ; Surveys ; Stars, ages
Keywords: circumstellar matter - planetary systems - white dwarfs
Abstract:
With the launch of the Wide-field Infrared Survey Explorer (WISE), a
new era of detecting planetary debris and brown dwarfs (BDs) around
white dwarfs (WDs) has begun with the WISE InfraRed Excesses around
Degenerates (WIRED) Survey. The WIRED Survey is sensitive to
substellar objects and dusty debris around WDs out to distances
exceeding 100pc, well beyond the completeness level of local WDs. In
this paper, we present a cross-correlation of the preliminary Sloan
Digital Sky Survey (SDSS) Data Release 7 (DR7) WD catalog between the
WISE, Two-Micron All Sky Survey (2MASS), UKIRT Infrared Deep Sky
Survey (UKIDSS), and SDSS DR7 photometric catalogs. From ∼18000 input
targets, there are WISE detections comprising 344 "naked" WDs
(detection of the WD photosphere only), 1020 candidate WD+M dwarf
binaries, 42 candidate WD+BD systems, 52 candidate WD+dust disk
systems, and 69 targets with indeterminate infrared excess. We
classified all of the detected targets through spectral energy
distribution model fitting of the merged optical, near-IR, and WISE
photometry. Some of these detections could be the result of
contaminating sources within the large (∼6") WISE point-spread
function; we make a preliminary estimate for the rates of
contamination for our WD+BD and WD+disk candidates and provide notes
for each target of interest.
Description:
The Wide-field Infrared Survey Explorer (WISE) is a NASA medium class
Explorer mission that was launched on 2009 December 14. WISE mapped
the entire sky simultaneously in four infrared (IR) bands centered at
3.4, 4.6, 12, and 22um (denoted W1, W2, W3, and W4, respectively).
The WISE InfraRed Excesses around Degenerates (WIRED) Survey is
designed to detect IR excesses around white dwarfs (WDs) using
photometry from the WISE catalog. In this paper, we focus on the WISE
detections of SDSS DR7 WDs (Kleinman, S.J. 2010AIPC.1273..156K 2010AIPC.1273..156K), which
we examined as part of the WIRED Survey.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 112 1527 SDSS photometry and system parameters of DR7 WDs
detected by WISE
table2.dat 116 1527 Near-infrared photometry of DR7 WDs detected by
WISE
table3.dat 73 1527 WISE infrared photometry of DR7 WDs
table5.dat 74 1020 WD+M star binary candidates
table6.dat 74 42 WD+BD binary candidates
table7.dat 62 52 WD+dust disk candidates
table8.dat 66 69 WDs with indeterminate IR excesses
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See also:
II/307 : WISE Preliminary Data Release (Cutri+ 2011)
II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
J/ApJS/197/19 : First brown dwarfs discovered by WISE (Kirkpatrick+, 2011)
J/A+A/536/A43 : SDSS WD main-sequence binaries. XII. (Nebot Gomez-Moran+,
2011)
J/MNRAS/402/620 : SDSS WD main-sequence binaries (Rebassa-Mansergas+, 2010)
J/ApJS/190/77 : Detailed analysis of cool WDs in the SDSS (Kilic+, 2010)
J/A+A/496/191 : Spectral analysis of 636 SDSS WD-M binaries (Heller+, 2009)
J/AJ/135/1239 : Spectral distances to DA white dwarfs (Holberg+, 2008)
J/MNRAS/382/515 : SDSS ultracool and halo WD candidates (Vidrih+, 2007)
J/MNRAS/382/1377 : SDSS WD main-sequence binaries (Rebassa-Mansergas+, 2007)
J/AJ/134/26 : Binaries with white dwarf in 2MASS (Hoard+, 2007)
J/AJ/134/252 : New nearby white dwarf systems (Subasavage+, 2007)
J/ApJ/657/1013 : IR photometry of 2MASS/Spitzer WDs (Tremblay+, 2007)
J/AJ/132/1221 : VJHK and SDSS photometry of DA white dwarfs (Holberg+, 2006)
J/ApJS/161/394 : Low-luminosity companions to white dwarfs (Farihi+, 2005)
J/AJ/128/1825 : Photometry identification of cool WDs (Kilic+, 2004)
J/ApJ/586/1356 : White dwarfs with cool companions (Wachter+, 2003)
J/ApJS/133/413 : BVRIJHK photometry of cool white dwarfs (Bergeron+, 2001)
http://irsa.ipac.caltech.edu/Missions/wise.html : IRSA - Wide-field Infrared
Survey Explorer (WISE) home page
http://www.ukidss.org/ : UKIRT Infrared Deep Sky Survey (UKIDSS) home page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Seq [1/1527] WIRED identification number
6- 23 A18 --- WIRED Source name; HHMMSS.ss+DDMMSS.s format (J2000)
25- 27 A3 --- n_WIRED [a,b ] IR excess white dwarf (1)
29 I1 --- Cl [0,4] Source classification flag (G1)
31- 36 F6.3 mag umag ? SDSS u band magnitude (2)
38- 40 I3 mmag e_umag ? Uncertainty in umag
42- 47 F6.3 mag gmag ? SDSS g band magnitude (2)
49- 51 I3 mmag e_gmag ? Uncertainty in gmag
53- 58 F6.3 mag rmag ? SDSS r band magnitude (2)
60- 62 I3 mmag e_rmag ? Uncertainty in rmag
64- 69 F6.3 mag imag ? SDSS i band magnitude (2)
71- 73 I3 mmag e_imag ? Uncertainty in imag
75- 80 F6.3 mag zmag ? SDSS z band magnitude (2)
82- 84 I3 mmag e_zmag ? Uncertainty in zmag
86- 89 I4 pc Dist Photometric derived distance
91- 96 I6 K Teff ? Effective temperature
98-101 F4.2 Gyr Age Age of the white dwarf
103-107 F5.2 [cm/s2] log(g) ? Log of the surface gravity
109-112 F4.2 Msun Mass Mass of the white dwarf
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Note (1): Flag as follows:
a = WD listed as IR excess in Steele et al. (2011MNRAS.416.2768S 2011MNRAS.416.2768S);
b = WD listed as IR excess in Girven et al. (2011MNRAS.417.1210G 2011MNRAS.417.1210G).
Note (2): Photometry is preliminary DR7 psfMag values.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Seq [1/1527] WIRED identification number
6- 23 A18 --- WIRED Source name; HHMMSS.ss+DDMMSS.s format
25 I1 --- Cl Source classification flag (G1)
27- 29 A3 --- UKI UKIDSS catalog, LAS or GCS (3)
31- 36 F6.3 mag Zmag ? UKIDSS Z band magnitude (4)
38- 39 I2 mmag e_Zmag ? Uncertainty in Zmag
41- 46 F6.3 mag Ymag ? UKIDSS Y band magnitude (4)
48- 50 I3 mmag e_Ymag ? Uncertainty in Ymag
52- 57 F6.3 mag Jmag ? UKIDSS J band magnitude (4)
59- 61 I3 mmag e_Jmag ? Uncertainty in Jmag
63- 68 F6.3 mag Hmag ? UKIDSS H band magnitude (4)
70- 72 I3 mmag e_Hmag ? Uncertainty in Hmag
74- 79 F6.3 mag Kmag ? UKIDSS K band magnitude (4)
81- 83 I3 mmag e_Kmag ? Uncertainty in Kmag
85- 90 F6.3 mag J2mag ? 2MASS J band magnitude (4)
92- 94 I3 mmag e_J2mag ? Uncertainty in 2MJmag
96-101 F6.3 mag H2mag ? 2MASS H band magnitude (4)
103-105 I3 mmag e_H2mag ? Uncertainty in 2MHmag
107-112 F6.3 mag K2mag ? 2MASS Ks band magnitude (4)
114-116 I3 mag e_K2mag ? Uncertainty in 2MKmag
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Note (3): Catalog is:
LAS = Large Area Survey;
GCS = Galactic Clusters Survey from Data Release 5plus.
Note (4): Photometry values without uncertainties are upper limits.
2MASS photometry is from the All Sky Point Source Catalog (Cat. II/246)
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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- 4 I4 --- Seq [1/1527] WIRED identification number
6- 23 A18 --- WIRED Source name; HHMMSS.ss+DDMMSS.s format
25 I1 --- Cl Source classification flag (G1)
27- 29 A3 --- WISE WISE catalog version (5)
31- 36 F6.3 mag W1mag ? WISE W1 band magnitude (3.4um) (6)
38- 40 I3 mmag e_W1mag ? Uncertainty in W1mag
42- 47 F6.3 mag W2mag ? WISE W2 band magnitude (4.6um) (6)
49- 51 I3 mmag e_W2mag ? Uncertainty in W2mag
53- 58 F6.3 mag W3mag ? WISE W3 band magnitude (12um) (6)
60- 62 I3 mmag e_W3mag ? Uncertainty in W3mag
64- 69 F6.3 mag W4mag ? WISE W4 band magnitude (22um) (6)
71- 73 I3 mmag e_W4mag ? Uncertainty in W4mag
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Note (5): WISE catalog version is:
i3a = WISE Atlas Catalog
i3o = WISE Co-add Catalog
p3a = WISE Preliminary Release Catalog
See section 3 for further details.
Note (6): Photometry values without uncertainties are upper limits.
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Byte-by-byte Description of file: table[56].dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Seq [1/1527] WIRED identification number
6- 23 A18 --- WIRED Source name; HHMMSS.ss+DDMMSS.s format (J2000)
25 A1 --- f_WIRED [a] belongs to flux-limited sample (G2)
27- 31 A5 --- SpT White Dwarf spectral type
33- 36 F4.2 Msun Mass Mass of the white dwarf
38- 41 F4.2 Gyr Age Age of the white dwarf
43- 46 I4 pc Dist Photometric distance from WD
48- 51 I4 pc Dist2 Photometric distance from the companion
(M dwarf or brown dwarf)
53- 54 A2 --- SpT2 Companion MK spectral type
56- 59 F4.1 --- E_SpT2 Upper limit uncertainty in SpT
61- 64 F4.1 --- e_SpT2 Lower limit uncertainty in SpT
66 A1 --- l_chi2 Limit flag on chi2
67- 74 F8.1 --- chi2 The χ2 of the fit
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Seq [1/1527] WIRED number
6- 23 A18 --- WIRED WIRED name (HHMMSS.ss+DDMMSS.s; J2000)
24 A1 --- f_WIRED [a] belongs to flux-limited sample (G2)
26- 30 A5 --- SpT WD spectral type
32- 36 I5 K Teff Effective temperature
38- 41 F4.2 Msun Mass Mass of the white dwarf
43- 46 F4.2 Gyr Age Age of the white dwarf
48- 51 I4 pc Dist Photometric distance
53- 54 I2 --- Rin Inner disk radius (Rin) vs RWD
56- 57 I2 deg i Disk inclination
59- 62 F4.1 --- chi2 Disk χ2 criterion
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Byte-by-byte Description of file: table8.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Seq [1/1527] WIRED number
6- 23 A18 --- WIRED WIRED name (HHMMSS.ss+DDMMSS.s; J2000)
24 A1 --- f_WIRED [a] belongs to flux-limited sample (G2)
26- 30 A5 --- SpT WD spectral type
32- 35 F4.2 Msun Mass Mass of the white dwarf
37- 40 F4.2 Gyr Age Age of the white dwarf
42- 45 I4 pc Dist Photometric distance from WD
47- 50 I4 pc Dist2 Photometric distance from companion
52- 53 A2 --- SpT2 Companion MK spectral type
55- 58 F4.1 --- chi2c Companion χ2 criterion
60- 61 I2 --- Rin Inner disk radius (Rin) vs RWD
63- 66 F4.1 --- chi2d Disk χ2 criterion
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Global notes:
Note (G1): Classification flag as follows:
0 = WD+BD (brown dawrf), see table6
1 = WD+M star, see table5
2 = WD+dust disk, see table7
3 = indeterminate IR excess, see table8
4 = naked WD.
Note (G2):
a = WD has a predicted W1 photospheric flux density >50uJy and is part of the
flux limited sample.
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History:
From electronic version of the journal
References:
Debes et al. Paper I. 2011ApJ...729....4D 2011ApJ...729....4D
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 17-Jan-2012