SIMBAD references

2004MNRAS.354..466K - Mon. Not. R. Astron. Soc., 354, 466-476 (2004/October-3)

A search for short time-scale JHK variability in ultracool dwarfs.


Abstract (from CDS):

The results of continuous monitoring, with typical durations of 2-4 h, of 18 L and T dwarfs are presented. Measurements were made simultaneously in JHKS, with a typical time resolution of about 10 min. Limits on the variability are well below 0.02 mag in all cases except for the faintest object. There are none the less a few dwarfs in which we may have observed variability: the same patterns of very low-level activity seemed to be present in the data for more than one filter. Simultaneous frequency-domain analysis of the J, H and KS data furthermore hints at a very short period (0.8-1.6 h) in a few objects. We also present a brief assessment of some of the variability test statistics that have been used in the field of ultracool dwarf variability.

Abstract Copyright: 2004 RAS

Journal keyword(s): stars: low-mass, brown dwarfs - stars: variables: other

CDS comments: table 1: SDSS 2028+0052 = 2MASS J20282035+0052265

Simbad objects: 21

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