Follow-up observations of ABDoradus: a possible radio binary in ABDorB

Details Follow-up observations of ABDoradus: a possible radio binary in ABDorB Follow-up observations of ABDoradus: a possible radio binary in ABDorB

Apr 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009atnf.prop.2258g&link_type=abstract

ATNF proposal V186, Semester: April, 2009

Mathematics

Stellar, Lba

Scientific paper

In November 2007 we observed the double-binary system in ABDoradus with the LBA. From these observations we have determined the dynamical mass of the main star, ABDorA, and discovered radioemission in both components of the 9" appart binary, ABDorBa and ABDorBb. In view of these results, we propose LBA phase-referenced observations of ABDoradus to 1) follow-up the reflex orbital motion of ABDorA and 2) confirm the radioemission in the binary ABDorBa / ABDorBb. Should this radioemission be confirmed, the masses of both stars could be precisely determined. The combination of the dynamical masses of ABDorA, ABDorBa and ABDorBb would provide precise inputs for testing PMS models of low-mass stars, which will help to alleviate the lack of calibration points of these models for masses below 1.2 Msun (Hillenbrand & White 2004; Mathieu 2006).

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