J/A+A/429/1007 RIJHK photometry of VLM objects near eps Ori (Scholz+, 2005)
Rotation and variability of very low mass stars and brown dwarfs near
epsilon Ori.
Scholz A., Eisloffel J.
<Astron. Astrophys. 429, 1007 (2005)>
=2005A&A...429.1007S 2005A&A...429.1007S
ADC_Keywords: Photometry, VRI ; Photometry, infrared ; Stars, masses
Keywords: techniques: photometric - stars: low-mass, brown dwarfs -
stars: rotation - Sun: activity - stars: magnetic fields -
stars: flare
Description:
Coordinates and photometry of very low mass objects near epsilon Ori
are presented. The RIJHK photometry of these objects is consistent
with membership of the young Ori OB Ib association. Time series
observations of this region were carried out using the ESO/MPG WFI at
the 2.2-m telescope on La Silla, from 18 to 22 December 2001. In the
framework of this monitoring campaign, we obtained deep Cousins R- and
I-band images, from which we derived coordinates (columns 2 and 3) as
well as photometry in the R- and I-band (columns 4 and 5). Additional
near-infrared photometry in J, H, K comes from the 2MASS database
(columns 6--8). The cluster member selection is based on a (I,R-I)
colour magnitude diagram. The (J-H) colours were used to reject
contaminating field stars. The masses given in column 9 were estimated
by comparing the near-infrared photometry with the evolutionary tracks
of Baraffe et al. (1998A&A...337..403B 1998A&A...337..403B), assuming an age of 5Myr.
Objects:
-----------------------------------------
RA (2000) DE Designation(s)
-----------------------------------------
05 36 12.8 -01 12 07 eps Ori
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 69 143 RIJHK photometry
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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- 3 I3 --- Seq Identification number
6 I1 h RAh Right ascension (J2000)
8- 9 I2 min RAm Right ascension (J2000)
11- 15 F5.2 s RAs Right ascension (J2000)
18 A1 --- DE- Declination sign
19 I1 deg DEd Declination (J2000)
21- 22 I2 arcmin DEm Declination (J2000)
24- 28 F5.2 arcsec DEs Declination (J2000)
31- 35 F5.2 mag Rcmag Cousins R-band photometry
38- 42 F5.2 mag Icmag Cousins I-band photometry
45- 49 F5.2 mag Jmag J-band photometry (from 2MASS)
52- 56 F5.2 mag Hmag H-band photometry (from 2MASS)
59- 63 F5.2 mag Ksmag Ks-band photometry (from 2MASS)
66- 69 F4.2 solMass Mass Mass estimate
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Acknowledgements: A. Scholz, scholz(at)tls-tautenburg.de
(End) Patricia Vannier [CDS] 27-Sep-2004