Pre-main Sequence stars \\ In an eccentric orbit \\ Clues to formation?

RX J1901.1-3648 (2MASS J19010971-3647528) was discovered in a ROSAT HRI observation of the Corona Australis star forming region. Initial optical spectroscopic followups showed it to be an SB2 system of two similar mid-K PMS stars. Over 4 nights the two spectra closed in velocity by 7 km/s. Twenty five years later we got around to investigating the orbit. It is a high-eccentricity system with asynchronous rotators. The Gaia parallax (6.55 mas) and proper motion confirm its membership in the CrA SFR.

Related Organizations

Stony Brook University
United States
Hobart and William Smith Colleges
United States

Keywords

pre-main-sequence stars

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