J/ApJ/596/437 Stellar-mass black holes in the SDSS (Chisholm+, 2003)
Stellar-mass black holes in the solar neighborhood.
Chisholm J.R., Dodelson S., Kolb E.W.
<Astrophys. J., 596, 437-450 (2003)>
=2003ApJ...596..437C 2003ApJ...596..437C
ADC_Keywords: X-ray sources ; Spectroscopy ; Photometry, SDSS
Keywords: black hole physics - solar neighborhood -
stars: fundamental parameters
Abstract:
We search for nearby, isolated, accreting, "stellar-mass"
(3-100M☉) black holes. Models suggest a synchrotron spectrum in
visible wavelengths and some emission in X-ray wavelengths. Of 3.7
million objects in the Sloan Digital Sky Survey Early Data Release,
Cat. J/AJ/123/567, about 150,000 objects have colors and properties
consistent with such a spectrum, and 87 of these objects are X-ray
sources from the ROSAT All-Sky Survey (Cat. IX/10 and IX/29).
Thirty-two of these have been confirmed not to be black holes using
optical spectra. We give the positions and colors of these 55 black
hole candidates and quantitatively rank them on their likelihood to be
black holes. We discuss uncertainties in the expected number of
sources and the contribution of black holes to local dark matter.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 97 87 X-ray selected remnant black hole candidates
table3.dat 97 29 Spectroscopically selected remnant black hole
candidates
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See also:
IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1999)
IX/29 : ROSAT All-Sky Survey Faint Source Catalog (Voges+ 2000)
J/AJ/123/567 : SDSS quasar catalog, I: Early Data Release (Schneider+, 2002)
J/AJ/126/2209 : X-ray AGN from RASS and SDSS (Anderson+, 2003)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- XID Candidate number ([CDK2003] X-NN in Simbad)
4 A1 --- n_XID Identification in SDSS (1)
6- 7 I2 h RAh Hour of Right Ascension (J2000)
9- 10 I2 min RAm Minute of Right Ascension (J2000)
12- 15 F4.1 s RAs Second of Right Ascension (J2000)
17 A1 --- DE- Sign of the Declination (J2000)
18- 19 I2 deg DEd Degree of Declination (J2000)
21- 22 I2 arcmin DEm Arcminute of Declination (J2000)
24- 27 F4.1 arcsec DEs Arcsecond of Declination (J2000)
29- 33 F5.2 mag u*mag The SDSS u* band magnitude (2)
35- 38 F4.2 mag e_u*mag The 1σ error in u*
40- 44 F5.2 mag g*mag The SDSS g* band magnitude (2)
46- 49 F4.2 mag e_g*mag The 1σ error in g*
51- 55 F5.2 mag r*mag The SDSS r* band magnitude (2)
57- 60 F4.2 mag e_r*mag The 1σ error in r*
62- 66 F5.2 mag i*mag The SDSS i* band magnitude (2)
68- 71 F4.2 mag e_i*mag The 1σ error in i*
73- 77 F5.2 mag z*mag The SDSS z* band magnitude (2)
79- 82 F4.2 mag e_z*mag The 1σ error in z*
84- 86 I3 ct/ks RASS ROSAT All Sky Survey count rate
88- 89 I2 ct/ks e_RASS The 1σ error in RASS
91- 96 F6.1 --- eta Relative overdensity (3)
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Note (1): Notes are numbered as follows:
1 = Object identified as a star in the SDSS spectroscopic survey.
2 = Object identified as a low redshift (z~<2.3) QSO in the SDSS
spectroscopic survey EDR database.
3 = Object identified as a high redshift (z∼2.3) QSO in the SDSS
spectroscopic survey EDR database.
4 = Object identified as a QSO in Richards et al. (2001,
Cat. J/AJ/121/2308).
Note (2): Reddening corrected point-spread-function (PSF) magnitudes.
Note (3): The overdensity η is defined in equation 30, and is used
to rank those candidates most likely to be remnant black holes (RBH).
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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- 2 I2 --- SID Candidate number ([CDK2003] S-NN in Simbad)
4 A1 --- n_SID Individual remarks (1)
6- 7 I2 h RAh Hour of Right Ascension (J2000)
9- 10 I2 min RAm Minute of Right Ascension (J2000)
12- 15 F4.1 s RAs Second of Right Ascension (J2000)
17 A1 --- DE- Sign of the Declination (J2000)
18- 19 I2 deg DEd Degree of Declination (J2000)
21- 22 I2 arcmin DEm Arcminute of Declination (J2000)
24- 27 F4.1 arcsec DEs Arcsecond of Declination (J2000)
29- 33 F5.2 mag u*mag The SDSS u* band magnitude (2)
35- 38 F4.2 mag e_u*mag The 1σ error in u*
40- 44 F5.2 mag g*mag The SDSS g* band magnitude (2)
46- 49 F4.2 mag e_g*mag The 1σ error in g*
51- 55 F5.2 mag r*mag The SDSS r* band magnitude (2)
57- 60 F4.2 mag e_r*mag The 1σ error in r*
62- 66 F5.2 mag i*mag The SDSS i* band magnitude (2)
68- 71 F4.2 mag e_i*mag The 1σ error in i*
73- 77 F5.2 mag z*mag The SDSS z* band magnitude (2)
79- 82 F4.2 mag e_z*mag The 1σ error in z*
84- 86 I3 --- Plate Plate number
88- 92 I5 d MJD Modified Julian Date of spectral observations
94- 96 I3 --- Fiber Fiber number
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Note (1): Notes are numbered as follows:
1 = Objects identified as QSOs in Veron-Cetty & Veron (2001,
Cat. VII/224).
2 = Objects identified as QSOs in Schneider et al. (2002, SDSS EDR,
Cat. J/AJ/123/567).
3 = Object identified as a DB WD in Reimers et al.
(1998A&A...337L..13R 1998A&A...337L..13R).
4 = This object is also X-ray selected object #3.
Note (2): Reddening corrected point-spread-function (PSF) magnitudes.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 02-Dec-2003