SIMBAD references

2010ApJ...714.1542B - Astrophys. J., 714, 1542-1546 (2010/May-2)

HD 101088, an accreting 14 AU binary in Lower Centaurus Crux with very little circumstellar dust.

BITNER M.A., CHEN C.H., MUZEROLLE J., WEINBERGER A.J., PECAUT M., MAMAJEK E.E. and McLURE M.K.

Abstract (from CDS):

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 Infrared Spectrometer 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 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 {dot}M > 1×10^-9 M_☉ yr^-1, which our multiple observation epochs show varies over a timescale of months. The upper limit on the 70 µm 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 Mmoon. We conclude that the classification of disks into either protoplanetary or debris disks based on fractional infrared luminosity alone may be misleading.

Abstract Copyright:

Journal keyword(s): binaries: close - circumstellar matter - protoplanetary disks - stars: individual: HD 101088

Simbad objects: 9

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2019.12.14-22:27:02

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