SIMBAD references

2008ApJ...687L..83R - Astrophys. J., 687, L83-L86 (2008/November-2)

Evidence for a photoevaporated circumbinary disk in Orion.

ROBBERTO M., RICCI L., DA RIO N. and SODERBLOM D.R.

Abstract (from CDS):

We have found a photoevaporated disk in the Orion Nebula that includes a wide binary. HST ACS observations of the proplyd 124-132 show two pointlike sources separated by 0.15", or about 60 AU at the distance of Orion. The two sources have nearly identical I and z magnitudes. We analyze the brightest component, source N, comparing the observed magnitudes with those predicted using a 1 Myr Baraffe/NextGen isochrone with different accretion luminosities and extinctions. We find that a low-mass (≃0.04 M) brown dwarf ∼1 Myr old with mass accretion rate logM{dot}≃-10.3, typical for objects of this mass, and about 2 mag of visual extinction provides the best fit to the data. This is the first observation of a circumbinary disk undergoing photoevaporation and, if confirmed by spectroscopic observations, the first direct detection of a wide substellar pair still accreting and enshrouded in its circumbinary disk.

Abstract Copyright:

Journal keyword(s): Stars: Binaries: General - ISM: Individual: Name: Orion Nebula - ISM: Individual: Messier Number: M42 - Stars: Planetary Systems: Protoplanetary Disks - Stars: Low-Mass, Brown Dwarfs

Simbad objects: 8

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