Circumstellar medium around close southern PMS binaries

We have started a series of high angular resolution observations of close southern pre Main-Sequence (PMS) binary systems in order to study their respective photometry from 1 to 5 μm. For most of the binaries of our sample, we present the first near infrared (NIR) measurements longward of $3 \mu$m o...

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Bibliographic Details
Published in:Astronomy and astrophysics (Berlin) 2001-04, Vol.369 (1), p.239-248
Main Authors: Geoffray, H., Monin, J.-L.
Format: Article
Language:English
Subjects:
circumstellar matter
infrared: stars
instrumentation: adaptive optics
stars: binaries: close
stars: formation
techniques: photometric
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Summary:We have started a series of high angular resolution observations of close southern pre Main-Sequence (PMS) binary systems in order to study their respective photometry from 1 to 5 μm. For most of the binaries of our sample, we present the first near infrared (NIR) measurements longward of $3 \mu$m on both components. From these measurements we characterize the stellar Spectral Energy Distribution (SED) of the primary and its companion, adjust standard photospheres to estimate their luminosities & temperatures, hence masses & ages through the use of an HR diagram. At the same time, we study the presence of circumstellar material around our PMS targets, in order to assess how the eventually leftover material is distributed after contraction. We find the same proportion of mixed systems (CTTS/WTTS) as in the overall southern clouds and all these mixed systems are found with mass ratios
ISSN:0004-6361
1432-0746
DOI:10.1051/0004-6361:20010133