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J/ApJ/699/1196    JHKs light curves of 2MASS J05352184-0546085    (Gomez+, 2009)

Near-infrared light curves of the brown dwarf eclipsing binary 2MASS J05352184-0546085: can spots explain the temperature reversal? Gomez Maqueo Chew Y., Stassun K.G., Prsa A., Mathieu R.D. <Astrophys. J., 699, 1196-1208 (2009)> =2009ApJ...699.1196G
ADC_Keywords: Photometry, infrared ; Binaries, eclipsing ; YSOs Keywords: binaries: eclipsing - stars: fundamental parameters - stars: individual (2MASS J05352184-0546085) - stars: low-mass, brown dwarfs - stars: pre-main sequence - stars: spots Abstract: We present near-infrared JHKS light curves for the double-lined eclipsing binary system Two Micron All Sky Survey J05352184-0546085, in which both components have been shown to be brown dwarfs with an age of ∼1Myr. We analyze these light curves together with the previously published IC-band light curve and radial velocities to provide refined measurements of the system's physical parameters. The component masses and radii are here determined with an accuracy of ∼6.5% and ∼1.5%, respectively. In addition, we confirm the previous surprising finding that the primary brown dwarf has a cooler effective temperature than its lower mass companion. Our analysis reveals two low-amplitude (∼0.02mag) periodic signals, one attributable to the rotation of the primary with a period of 3.293±0.001d and the other to the rotation of the secondary with a period of 14.05±0.05d. Both periods are consistent with the measured vsin i and radii. Description: The observations of 2MASS J05352184-0546085 presented in this paper were taken in the 2MASS near-infrared bands JHKS from 2003 October to 2006 April at Cerro Tololo Inter-American Observatory in Chile. They were observed with the SMARTS 1.3m telescope using the ANDICAM instrument which allows for simultaneous optical and infrared imaging (the optical measurements have been reported in Paper I (Stassun et al. 2006Natur.440..311S) and Paper II (Stassun et al. Cat. J/ApJ/664/1154). The integration times were typically of 490s. Objects: ----------------------------------------------------------- RA (2000) DE Designation(s) ----------------------------------------------------------- 05 35 21.8 -05 46 09 2M0535-05 = 2MASS J05352184-0546085 ----------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 24 362 Differential J band light curve of 2M0535-05 table3.dat 24 567 Differential H band light curve of 2M0535-05 table4.dat 24 385 Differential Ks band light curve of 2M0535-05
See also: J/ApJ/664/1154 : Light curve of 2MASS J05352184-0546085 (Stassun+, 2007) Byte-by-byte Description of file: table[234].dat
Bytes Format Units Label Explanations
1- 14 F14.6 d HJD Heliocentric Julian Date 16- 23 F8.5 mag Dmag Differential J, H or Ks band magnitude 24 A1 --- --- [0] (table 2, table 3 or table 4 respectively)
History: From electronic version of the journal References: Stassun et al. Paper I. 2006Natur.440..311S Stassun et al. Paper II. 2007ApJ...664.1154S Cat. J/ApJ/664/1154
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 06-Jul-2011
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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