HD 101088, An Accreting 14 AU Binary in Lower Centaurus Crux With Very Little Circumstellar Dust

Details HD 101088, An Accreting 14 AU Binary in Lower Centaurus Crux With Very Little Circumstellar Dust HD 101088, An Accreting 14 AU Binary in Lower Centaurus Crux With Very Little Circumstellar Dust

2010-04-22

arxiv.org/abs/1004.4000v1

Astrophysical Journal 714 (2010) 1542-1546

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

8 pages, 2 figures, ApJ accepted

Scientific paper

We present high resolution (R=55,000) optical spectra obtained with MIKE on the 6.5 m Magellan Clay Telescope as well as Spitzer MIPS photometry and IRS low resolution (R~60) spectroscopy of the close (14 AU separation) binary, HD 101088, a member of the ~12 Myr old southern region of the Lower Centaurus Crux (LCC) subgroup of the Scorpius-Centaurus OB association. We find that the primary and/or secondary is accreting from a tenuous circumprimary and/or circumsecondary disk despite the apparent lack of a massive circumbinary disk. We estimate a lower limit to the accretion rate of > 1x10^-9 solar masses per year, which our multiple observation epochs show varies over a timescale of months. The upper limit on the 70 micron flux allows us to place an upper limit on the mass of dust grains smaller than several microns present in a circumbinary disk of 0.16 moon masses. We conclude that the classification of disks into either protoplanetary or debris disks based on fractional infrared luminosity alone may be misleading.

Affiliated with

Also associated with

No associations

Rating

HD 101088, An Accreting 14 AU Binary in Lower Centaurus Crux With Very Little Circumstellar Dust 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 HD 101088, An Accreting 14 AU Binary in Lower Centaurus Crux With Very Little Circumstellar Dust, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and HD 101088, An Accreting 14 AU Binary in Lower Centaurus Crux With Very Little Circumstellar Dust will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-693467