J/ApJS/161/394 Low-luminosity companions to white dwarfs (Farihi+, 2005)
Low-luminosity companions to white dwarfs.
Farihi J., Becklin E.E., Zuckerman B.
<Astrophys. J. Suppl. Ser., 161, 394-428 (2005)>
=2005ApJS..161..394F 2005ApJS..161..394F
ADC_Keywords: Stars, white dwarf ; Stars, double and multiple ; Proper motions ;
Photometry, UVBGRI ; Photometry, infrared
Keywords: binaries: general - stars: evolution - stars: formation -
stars: fundamental parameters - stars: low-mass, brown dwarfs -
stars: luminosity function, mass function - white dwarfs
Abstract:
This paper presents results of a near-infrared imaging survey for
low-mass stellar and substellar companions to white dwarfs. A
wide-field proper-motion survey of 261 white dwarfs was capable of
directly detecting companions at orbital separations between 100 and
5000 AU with masses as low as 0.05M☉, while a deep near-field
search of 86 white dwarfs was capable of directly detecting companions
at separations between 50 and 1100AU with masses as low as
0.02M☉. Additionally, all white dwarf targets were examined for
near-infrared excess emission, a technique capable of detecting
companions at arbitrarily close separations down to masses of
0.05M☉.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 67 394 Observed targets
table3.dat 87 84 Summary of all companion systems
table5.dat 78 79 Optical and near-infrared photometry of resolved pairs
table6.dat 158 27 Optical and near-infrared photometry of composite pairs
refs.dat 80 76 References
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See also:
III/235 : Spectroscopically Identified White Dwarfs (McCook+, 2003)
III/70 : Luyten's White Dwarf Catalogues (Luyten, 1970-77)
J/ApJS/133/413 : BVRIJHK photometry of cool white dwarfs (Bergeron+, 2001)
J/ApJS/156/47 : DA white dwarfs from the Palomar Green Survey (Liebert+ 2005)
J/A+A/378/556 : UVES/VLT spectra of white dwarfs (Koester+, 2001)
J/AJ/126/1023 : White Dwarfs in the SDSS (Harris+, 2003)
J/ApJ/571/512 : Distances of white dwarf stars (Holberg+, 2002)
J/ApJ/586/1356 : JHKs photometry of 2MASS white dwarf (Wachter+, 2003)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- WD McCook & Sion (1987, See Cat. III/235)
white dwarf identification
10- 11 A2 --- f_WD [d ] WD status (1)
13- 22 A10 --- Name Other name
24- 28 A5 --- SpType Spectral type (2)
30- 34 F5.1 pc Dist ? Distance
36- 40 F5.3 arcsec/yr pm ? Proper motion
42- 46 F5.1 deg pmPA ? Position angle of proper motion
48- 51 I4 km/s Uvel ? Velocity towards the Galactic anticenter (3)
53- 56 I4 km/s Vvel ? Velocity in the direction of galactic
rotation (3)
58- 61 I4 km/s Wvel ? Velocity toward the North Galactic Pole (3)
63- 67 A5 --- Tel Telescope: S=Steward, K=Keck, I=IRTF
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Note (1): Flag on WD, as follows:
d = Not a white dwarf.
dd = Not listed in McCook & Sion (1999, Cat. III/235). The WD number is
unofficial.
Note (2): The integer value represents the effective temperature index,
defined as 10(qeff), where qeff=5040/Teff
(McCook & Sion 1987, See Cat. III/235).
Note (3): Corrected for the solar motion (UVel,VVel,WVel) =(-9,+12,+7)
(Wielen 1974HiA.....3..395W 1974HiA.....3..395W; Mihalas & Binney 1981, Galactic Astronomy
(San Francisco: Freeman)) relative to the local standard of rest.
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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 A13 --- CName Companion name
14 A1 --- n_CName [cd] Note on CName (1)
16- 20 A5 --- SpTypeC Companion spectral type
22- 29 A8 --- WD Primary name
31- 36 A6 --- SpType Primary spectral type
38 A1 --- f_Sep Flag on Sep (2)
39- 44 F6.2 arcsec Sep ? Separation on the sky
46- 50 F5.1 deg PA ? Position angle of resolved companion
52- 56 F5.1 pc Dist Best distance estimate for the white dwarf
58 A1 --- l_a [<] Upper limit flag on a
59- 65 F7.1 AU a Projected separation of the binary
67- 71 F5.2 mag VMAG ? Absolute V magnitude (3)
73- 87 A15 --- Ref References (detailed in refs.dat)
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Note (1): Note on CName, defined as follows:
c = Candidate companion
d = Discovered independently of the full survey
Note (2): Flag on Sep, defined as follows:
< = Sep is an upper limit
* = Indicates a known radial velocity variable.
Note (3): The absolute V magnitude for white dwarf companions or the absolute K
magnitude for low-mass stellar and substellar companions.
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- Name Star name
15 A1 --- n_Name [a] Indicates a candidate companion
17- 21 F5.2 mag Bmag ? B magnitude (G1)
23- 27 F5.2 mag Vmag ? V magnitude (G1)
29- 33 F5.2 mag Rcmag ? R magnitude (Cousins) (G1)
35- 39 F5.2 mag Icmag ? I magnitude (Cousins) (G1)
41- 45 F5.2 mag Jmag ? J magnitude (G1)
47- 51 F5.2 mag Hmag ? H magnitude (G1)
53- 57 F5.2 mag Kmag ? K magnitude (G1)
59- 69 A11 --- Ref References (detailed in refs.dat)
71- 78 A8 --- WD WD name of target (G2)
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- Name Star name
17- 21 F5.2 mag Bmag ? B magnitude (G1)
23- 27 F5.2 mag Vmag V magnitude (G1)
29- 33 F5.2 mag Rcmag ? R magnitude (Cousins) (G1)
35- 39 F5.2 mag Icmag ? I magnitude (Cousins) (G1)
41- 45 F5.2 mag Jmag J magnitude (G1)
47- 51 F5.2 mag Hmag ? H magnitude (G1)
53- 57 F5.2 mag Kmag K magnitude (G1)
59- 69 A11 --- Ref References
71- 75 F5.2 mag BmagP Predicted B magnitude for the white dwarf
component (1)
77- 81 F5.2 mag VmagP Predicted V magnitude for the white dwarf
component (1)
83- 87 F5.2 mag RcmagP Predicted R magnitude (Cousins) for the
white dwarf component (1)
89- 93 F5.2 mag IcmagP Predicted I magnitude (Cousins) for the
white dwarf component (1)
95- 99 F5.2 mag JmagP Predicted J magnitude for the white dwarf
component (1)
101-105 F5.2 mag HmagP Predicted H magnitude for the white dwarf
component (1)
107-111 F5.2 mag KmagP Predicted K magnitude for the white dwarf
component (1)
113-119 A7 --- RefWD References for the photometry of WD component
121-125 F5.2 mag RcmagD ? Deconvolved R magnitude for the red dwarf
component
127-131 F5.2 mag IcmagD ? Deconvolved I magnitude for the red dwarf
component
133-137 F5.2 mag JmagD ? Deconvolved J magnitude for the red dwarf
component
139-143 F5.2 mag HmagD ? Deconvolved H magnitude for the red dwarf
component
145-149 A5 --- KmagD Deconvolved K magnitude for the red dwarf
component
151-158 A8 --- WD WD name of target (G2)
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Note (1): The predicted magnitudes for the white dwarf (WD) component
based on the most current hydrogen and helium atmosphere model grids
of P. Bergeron (2002, private communication). The predicted white
dwarf magnitudes are calculated by adding model colors (appropriate
for its Teff, and log g if known) to a photometric bandpass that is
essentially uncontaminated by its cool red dwarf companion - either U
or B (or V in a few rare cases).
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- Ref Reference number
5- 23 A19 --- Bibcode Bibcode
25- 44 A20 --- Aut Author's name
46- 80 A35 --- Com Comment
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Global Notes:
Note (G1): Uncertainties for photometry are 5% or less with a few exceptions
(cf. Section 4.5).
Note (G2): Column not in the original table, added at CDS
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History:
From electronic version of the journal
* 04-Jul-2006: several errors in table3.dat: primary name should be
0131-163 (instead of 0131+163), 1001+203 (instead of 1001+103),
1240+754 (instead of 1240-754).
* 08-Jul-2006: in table1.dat:
WD 2116+736 is given a KPD other name: changed to KUV
WD 2328+107 is given a KPD other name: changed to KUV
WD 0013-241: in col. Name, Ton 147 is changed to Ton S 147
* 08-Aug-2006: column WD added in table5 and table6.
* 14-Mar-2017: In table1, SBSS 0914+547 corrected into SBSS 0914+546
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 29-Jun-2006