2013MNRAS.428.1537P


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.17CEST16:03:14

2013MNRAS.428.1537P - Mon. Not. R. Astron. Soc., 428, 1537-1550 (2013/January-2)

IRAS 19520+2759: a 105 L☉ massive young stellar object driving a collimated outflow.

PALAU A., SANCHEZ CONTRERAS C., SAHAI R., SANCHEZ-MONGE A. and RIZZO J.R.

Abstract (from CDS):

The theory of massive star formation currently suffers from a scarce observational base of massive young stellar objects to compare with. In this paper, we present interferometric 12CO (1-0), 13CO (1-0), C18O (1-0) and 2.6mm continuum images of the infrared source IRAS 19520+2759 together with complementary single-dish observations of CS (1-0), obtained with the 34 m antenna DSS-54 at the Madrid Deep Space Communications Complex, as well as archive images at different wavelengths. As a result from our work, IRAS 19520+2759, with a controversial nature in the past, is firmly established as a massive young stellar object associated with a strong and compact millimetre source and driving a collimated outflow. In addition, a second fainter millimetre source is discovered about 4 arcsec to the south, which is also driving an outflow. Furthermore, the two millimetre sources are associated with C18O clumps elongated perpendicularly to the outflows, which may be related to rotating toroids. The masses of gas and dust of the millimetre sources are estimated to be around 100 and 50 M☉. MM1, the dominant source at all wavelengths, with a total luminosity of (1-2)x105 L☉ at 9 kpc, is however not associated with 6cm emission down to an rms noise level of 0.1 mJy. We propose that IRAS 19520+2759 could be an example of the recent theoretical prediction of `bloated' or `swollen' star, i.e. a massive young stellar object whose radius has increased due to effects of accretion at a high-mass accretion rate.

Abstract Copyright: © 2012 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2012)

Journal keyword(s): stars: formation - stars: massive - stars: winds, outflows - ISM: individual objects: IRAS 19520+2759 - ISM: molecules

Nomenclature: Fig. 2, Table 2: [PSS2013] MMNW (Nos MM1-MM2, MM2W). Fig. 3: [PSS2013] VLA1 N=1.

CDS comments: 19:54:06.00 +28:07:36.3 (mm) C 2013MNRAS.428.1537P

Simbad objects: 20

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Number of rows : 20

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 W 3 MoC 02 27 04.10 +61 52 27.1           ~ 942 3
2 [RLK73] IRc 2 IR 05 35 14.51548 -05 22 30.5943           ~ 559 1
3 ZOAG G184.95-00.85 SFR 05 53 42.717 +24 14 54.01           ~ 39 0
4 2MASS J05534356+2414447 Y*O 05 53 43.5659892117 +24 14 44.668205121           G9-K2 40 0
5 IRAS 05506+2414 mul 05 53 44.8 +24 14 45           ~ 42 0
6 3C 286 Sy1 13 31 08.2885060664 +30 30 32.960825108   17.51 17.25     ~ 3615 1
7 GAL 332.2-00.4 HII 16 16 40 -51 17.3           ~ 4 0
8 NAME M 8E IR Y*O 18 04 53.9 -24 26 41           ~ 81 0
9 SNR G010.6-00.4 SNR 18 10 28 -19 55.8           ~ 56 0
10 NAME HH 80-81 HH 18 19 06 -20 51.4           ~ 186 0
11 Cl* NGC 6618 B 275 * 18 20 25.17 -16 10 26.7     15.6     B2V 19 0
12 RAFGL 2136 SFR 18 22 26.8740 -13 30 17.177           ~ 232 0
13 GAL 028.20-00.04 HII 18 42 58.2 -04 14 05           ~ 49 0
14 ICRF J192559.6+210626 QSO 19 25 59.60535560 +21 06 26.1620442           ~ 172 1
15 IRAS 19520+2759 PN 19 54 06.5368 +28 07 43.757           O9I? 35 0
16 SNR G065.1+00.6 SNR 19 54.7 +28 35           ~ 41 0
17 QSO B2023+336 BLL 20 25 10.84210 +33 43 00.2144       0   ~ 120 1
18 V* V645 Cyg Ae* 21 39 58.255 +50 14 20.93           O6/9eq 246 0
19 3C 454.3 QSO 22 53 57.74798 +16 08 53.5611   16.57 16.10 15.22   ~ 2439 2
20 [WBN74] NGC 7538 IRS 1 Y*O 23 13 45.318 +61 28 11.69           ~ 359 3

    Equat.    Gal    SGal    Ecl

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2019.10.17-16:03:14

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