Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2011-08-08
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
Accepted in A&A. 5 pages, 3 figures and 1 table
Scientific paper
Massive far-red and infrared imaging surveys in different bandpasses are the main contributors to the discovery of brown dwarfs. The Virtual Observatory represents an adequate framework to handle these vast datasets efficiently and filter them out according to specific requirements. A statistically significant number of BDs is mandatory for understanding their general properties better for identifing peculiar objects. WISE, an all-sky survey in the mid-infrared, provides an excellent opportunity to increase the number of BDs significantly, in particular those at the lower end of the temperature scale. We aim to demonstrate that VO tools are efficient in identifing and characterizing BDs by cross-correlating public catalogues released by large surveys. Using VO tools we performed a cross-match of the WISE Preliminary Release, the 2MASS Point Source and the SDSS Data Release 7 catalogues over the whole area of sky that they have in common ($\sim$ 4000 deg$^{2}$). Photometric and proper motion criteria were used to obtain a list of BD candidates. A temperature estimate is provided for each candidate based on their spectral energy distribution using VOSA, a VO tool for SED fitting. We derive the spectral types from the effective temperatures. Distances, calculated from the absolute magnitude- spectral type relation, place our candidates at 14-80 pc from the Sun, assuming that they are single. We have identified 31 BD candidates, 25 of which have already been reported in the literature. The remaining six candidates have been classified as L- (four) and T-type (two) objects. The high rate of recovery of known BDs ($\sim$ 90% of the T dwarfs catalogued in 2MASS) demonstrates the validity of our strategy to identify them with VO tools.
Aberasturi M.
Martin Eduardo L.
Solano Enrique
No associations
LandOfFree
WISE/2MASS-SDSS brown dwarfs candidates using Virtual Observatory tools does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with WISE/2MASS-SDSS brown dwarfs candidates using Virtual Observatory tools, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and WISE/2MASS-SDSS brown dwarfs candidates using Virtual Observatory tools will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-190276