J/ApJ/684/635 New low-mass eclipsing binary from SDSS-II (Blake+, 2008)
A new low-mass eclipsing binary from SDSS-II.
Blake C.H., Torres G., Bloom J.S., Gaudi B.S.
<Astrophys. J., 684, 635-643 (2008)>
=2008ApJ...684..635B 2008ApJ...684..635B
ADC_Keywords: Binaries, eclipsing ; Photometry, infrared
Keywords: binaries: eclipsing - stars: low-mass, brown dwarfs
Abstract:
We present observations of a new low-mass, double-lined eclipsing
binary system discovered using repeat observations of the celestial
equator from the Sloan Digital Sky Survey II. Using near-infrared
photometry and optical spectroscopy we have measured the properties of
this short-period [P=0.407037(14)days] system and its two components.
We find the following parameters for the two components:
M1=0.272±0.020M☉, R1=0.268±0.010R☉,
M2=0.240±0.022M☉, R2=0.248±0.0090R☉,
T1=3320±130K, and T2=3300±130K. The masses and radii of the
two components of this system agree well with theoretical expectations
based on models of low-mass stars, within the admittedly large errors.
Description:
The SDSS-II Supernova Survey (Frieman et al., 2008AJ....135..338F 2008AJ....135..338F)
repeatedly observes about 300deg2 of sky centered around the
celestial equator. We downloaded all of the imaging data from i band
and the corresponding pipeline outputs available as of 2006 April.
Objects:
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RA (2000) DE Designation(s)
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03 18 23.9 -01 00 18 NAME SDSS-MEB-1 = 2MASS J03182386-0100183
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 28 2402 NIR photometry of SDSS-MEB-1
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See also:
http://www.sdss.org/drsn1/DRSN1_data_release.html : SDSS-II SN survey home
page
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d HJD Heliocentric Julian Date
14- 15 A2 --- Band Filter band (H, J or Ks)
17- 22 F6.3 mag mag Observed magnitude in Band
24- 28 F5.3 mag e_mag The 1σ error in mag
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 06-Dec-2010