RX J0513.1+0851 and RX J0539.9+0956: Two Young, Rapidly Rotating Spectroscopic Binary Stars

Details RX J0513.1+0851 and RX J0539.9+0956: Two Young, Rapidly Rotating Spectroscopic Binary Stars RX J0513.1+0851 and RX J0539.9+0956: Two Young, Rapidly Rotating Spectroscopic Binary Stars

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21933714r&link_type=abstract

American Astronomical Society, AAS Meeting #219, #337.14

Astronomy and Astrophysics

Astronomy

Scientific paper

Pre-main sequence spectrsocopic binaries provide an invaluable tool for determinations of dynamical mass ratios and, ultimately, absolute masses. RX J0513.1+0851 and RX J0539.9+0956 were initially identified as young, low-mass, single-lined spectroscopic binary systems and classified as weak-lined T Tauri stars. These systems have high rotational velocities of 50 km/s and 80 km/s, respectively. We used near-infrared spectroscopy taken with NIRSPEC on Keck II to provide a first detection of these systems as double-lined rather than single-lined. The low-mass secondary component is cooler and redder than the primary component. The flux scales as a less steep function of mass in the infrared than in the visible, thus we are more sensitive to detection of lower-mass secondary stars in the infrared. We measured the radial velocities and estimated the spectral types, vsini values, and flux ratios using two-dimensional cross-correlation. The orbital parameters and mass ratios were calculated by combining existing visible light data and our new infrared data for both systems. Results from our initial analysis indicate that RX J0513.1+0851 may be a member of an older population. We derive periods of 4 days and 1130 days for RX J0513.1+0851 and RX J0539.9+0956, respectively.

Affiliated with

Also associated with

No associations

Rating

RX J0513.1+0851 and RX J0539.9+0956: Two Young, Rapidly Rotating Spectroscopic Binary Stars 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 RX J0513.1+0851 and RX J0539.9+0956: Two Young, Rapidly Rotating Spectroscopic Binary Stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and RX J0513.1+0851 and RX J0539.9+0956: Two Young, Rapidly Rotating Spectroscopic Binary Stars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1580856