A Keplerian gaseous disk around the B0 star R Mon

Abstract

We present high-angular resolution observations of the circumstellar disk around the massive Herbig Be star R Mon (M~8 Msun) in the continuum at 2.7mm and 1.3mm and the CO 1->0 and 2->1 rotational lines. Based on the new 1.3mm continuum image we estimate a disk mass (gas+dust) of 0.007 Msun and an outer radius of <150 AU. Our CO images are consistent with the existence of a Keplerian rotating gaseous disk around this star. Up to our knowledge, this is the most clear evidence for the existence of Keplerian disks around massive stars reported thus far. The mass and physical characteristics of this disk are similar to thoseof the more evolved T Tauri stars and indicate a shorter timescale for the evolution and dispersal of circumstellar disks around massive stars which lose most of their mass before the star becomes visible.

arXiv comment5 pages

References in corpus (8)

• ISO spectroscopy of circumstellar dust in 14 Herbig Ae/Be systems: towards an understanding of dust processing
• Flaring vs. self-shadowed disks: the SEDs of Herbig Ae/Be stars
• Spatially Resolved Circumstellar Structure of Herbig Ae/Be Stars in the Near-Infrared
• [O I] 6300A emission in Herbig Ae/Be systems: signature of Keplerian rotation
• Probing the circumstellar structure of Herbig Ae/Be stars
• A Keplerian disk around the Herbig Ae star HD 34282
• First evidence for dusty disks around Herbig Be stars
• A rotating disk around the very young massive star AFGL 490

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• Evolution of the dust/gas environment around Herbig Ae/Be stars
• Relic proto-stellar disks and the origin of luminous circumstellar interaction in core collapse supernovae
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• Dissecting an intermediate-mass (IM) protostar: Chemical differentiation in IC1396N
• Protostellar clusters in intermediate-mass (IM) star forming regions
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• The dusty disk around VV Ser
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• The physical conditions in Gomez's Hamburger (IRAS 18059-3211), a pre-MS rotating disk
• Re-visiting the case of R Mon: Is CO removed at R<20 au?
• Time variability in the bipolar scattered light nebula of L1527 IRS: A possible warped inner disk
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