SIMBAD references

2011ApJ...738...12T - Astrophys. J., 738, 12 (2011/September-1)

Ro-vibrational CO detected in the β Pictoris circumstellar disk.

TROUTMAN M.R., HINKLE K.H., NAJITA J.R., RETTIG T.W. and BRITTAIN S.D.

Abstract (from CDS):

We present high-resolution near-infrared spectra of β Pictoris–a nearby young star with a debris disk. Fundamental low-J CO absorption lines are detected and strict upper limits are placed on the flux of v = 2-1 low-J CO emission lines. The limit on the UV fluorescent emission flux in the v = 2-1 lines is used to place a tight constraint on the inner extent of the CO gas. Assuming H I is the primary collision partner, the sub-thermal population of the low-J v = 0 rotational levels constrains the density of the gas in the disk to nH= (2.5+7.1_- 1.2_)x105/cm3. If the distribution of hydrogen follows that of the other metals in the disk, we find that the mass of the gas in the disk is 0.17+0.47_- 0.08M⊕_. We compare this mass to the gas mass necessary to brake the metals in the disk through ion-neutral reactions.

Abstract Copyright:

Journal keyword(s): circumstellar matter - infrared: stars - protoplanetary disks

Simbad objects: 4

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2019.10.22-14:33:25

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