2011A&A...530A..40P


Query : 2011A&A...530A..40P

2011A&A...530A..40P - Astronomy and Astrophysics, volume 530A, 40-40 (2011/6-1)

Detection of a large massive circumstellar disk around a high-mass young stellar object in the Carina Nebula.

PREIBISCH T., RATZKA T., GEHRING T., OHLENDORF H., ZINNECKER H., KING R.R., McCAUGHREAN M.J. and LEWIS J.R.

Abstract (from CDS):

The characterization of circumstellar disks around young stellar objects can provide important information about the process of star formation and the possible formation of planetary systems. We investigate the spatial structure and the spectral energy distribution of a newly discovered edge-on circumstellar disk around an optically invisible young stellar object that is embedded in a dark cloud in the Carina Nebula. The disk object was serendipitously discovered in our deep near-IR imaging survey of the Carina Nebula obtained with HAWK-I at the ESO VLT. Whereas the object was detected as an apparently point-like source in earlier infrared observations, only the superb image quality (FWHM≃0.5'') of the HAWK-I data could reveal, for the first time, the peculiar morphology of the object. It consists of a very red point-like central source that is surrounded by a roughly spherical nebula, which is intersected by a remarkable dark lane through the center. We construct the spectral energy distribution of the object from 1µm to 870µm and perform a detailed radiative transfer modeling of the spectral energy distribution and the source morphology. The observed object morphology in the near-IR images clearly suggests a young stellar object that is embedded in an extended, roughly spherical envelope and surrounded by a large circumstellar disk with a diameter of ≃5500AU that is seen nearly edge-on. The radiative transfer modeling shows that the central object is highly luminous and thus must be a massive young stellar object, most likely in the range 10-15M. The circumstellar disk has a mass of about 2M. The disk object in Carina is one of the most massive young stellar objects for which a circumstellar disk has been detected so far. The size and mass of the disk are very large compared to the corresponding values found for most other similar objects. These results support the assumption that 10-15M stars can form via accretion from a circumstellar disk.

Abstract Copyright:

Journal keyword(s): stars: formation - circumstellar matter - stars: pre-main sequence - ISM: individual objects: NGC 3372

Nomenclature: Fig. 3, Text: [PRG2011] disk object N=1, [PRG2011] star 31.3-11 N=1, [PRG2011] YSO 32.2-14 N=1.

Simbad objects: 16

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Number of rows : 16
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 3765 0
2 Cl Trumpler 14 OpC 10 43 56 -59 33.0   5.70 5.5     ~ 454 0
3 Cl* Trumpler 14 VBF 425 * 10 44 29.8898098019 -59 33 17.210575246   19.782 18.081   15.88 ~ 4 0
4 [RBB2002] N4-I2 Y*O 10 44 31.3185112499 -59 33 11.542751476         17.04 ~ 6 2
5 [RBB2002] N4 mul 10 44 32.1 -59 33 20           ~ 8 0
6 [RBB2002] N4-I1 Y*? 10 44 32.304 -59 33 14.86           ~ 4 1
7 2MASS J10443341-5933189 Y*O 10 44 33.4061167305 -59 33 19.171034290 16.286 16.726 16.265   14.52 B 4 0
8 HD 303311 SB* 10 44 37.4603321026 -59 32 55.459963798 8.30 9.042 8.979 9.58 9.09 O6V((f))z 78 0
9 C 1042-593 OpC 10 44 39.00 -59 33 36.0     6.8     ~ 60 0
10 HD 93250 * 10 44 45.0270200315 -59 33 54.681395850 6.73 8.12 7.50 8.38   O4III(fc) 299 0
11 HD 93268 * 10 44 52.5105492753 -59 33 23.092400554 9.47 9.42 9.291 9.19 9.12 A2 21 0
12 NGC 3372 HII 10 45 02.23 -59 41 59.8           ~ 927 2
13 * eta Car Em* 10 45 03.545808 -59 41 03.95124 6.37 7.03 6.48 4.90 4.41 OBepec 2285 0
14 Cl Trumpler 16 OpC 10 45 10 -59 43.0   5.35 5.0     ~ 444 0
15 NAME Treasure Chest Cluster Cl* 10 45 54.0 -59 56 58           ~ 26 1
16 NGC 6618 OpC 18 20 47 -16 10.3           ~ 1526 0

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2021.09.20-19:28:06

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