2020ApJ...904...77G

Query : 2020ApJ...904...77G

2020ApJ...904...77G - Astrophys. J., 904, 77-77 (2020/November-3)

A photoionized accretion disk around a young high-mass star.

GUZMAN A.E., SANHUEZA P., ZAPATA L., GARAY G. and RODRIGUEZ L.F.

Abstract (from CDS):

We present high spatial resolution (52 au) observations of the high-mass young stellar object (HMYSO) G345.4938+01.4677 made using the Atacama Large Millimeter/submillimeter Array. This O-type HMYSO is located at 2.38 kpc and is associated with a luminosity of 1.5 x 105 L☉. We detect circumstellar emission from the H38β hydrogen recombination line showing a compact structure rotating perpendicularly to the previously detected radio jet. We interpret this emission as tracing a photoionized accretion disk around the HMYSO. While this disk-like structure seems currently too small to sustain continued accretion, the data present direct observational evidence of how disks can effectively survive the photoionization feedback from young high-mass stars. We also report the detection of a low-mass young stellar object in the vicinity of the HMYSO and suggest that it forms a high-mass and low-mass star binary system.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Star formation - Massive stars - Circumstellar disks - Compact H II region - H I line emission

CDS comments: Calibrator J1711-3744 is not in SIMBAD.

Simbad objects: 29

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Number of rows : 29
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 [RLK73] IRc 2 IR 05 35 14.51548 -05 22 30.5943           ~ 673 1
2 MMB G192.600-00.048 Y*O 06 12 54.0100 +17 59 23.200           ~ 430 0
3 RCW 7 HII 07 32 09.59 -16 58 12.3           ~ 56 0
4 IRAS 07299-1651 Y*O 07 32 09.7800 -16 58 12.800           ~ 85 0
5 RAFGL 4176 Y*O 13 43 01.70352 -62 08 51.2304           ~ 163 0
6 IRAS 13481-6124 Y*O 13 51 37.85568 -61 39 07.5168           ~ 55 0
7 QSO B1424-41 Bla 14 27 56.29756617 -42 06 19.4376238   18.48 17.7 16.30   ~ 547 1
8 [PLW2012] G343.124-00.064-030.4 cor 16 58 17 -42 52.3           ~ 31 0
9 IRAS 16547-4247 Y*O 16 58 17.208 -42 52 08.16           ~ 187 0
10 2MASS J16593928-4004080 NIR 16 59 39.2833718328 -40 04 08.079684852           ~ 1 0
11 [GGR2014] 10 mm 16 59 41.63 -40 03 43.6           ~ 2 0
12 IRAS 16562-3959 SFR 16 59 42.257 -40 03 45.17           ~ 77 0
13 2MASS J16594297-4003114 Y*? 16 59 42.9737229816 -40 03 11.474944524           ~ 2 0
14 MSX5C G353.2730+00.6412 Y*O 17 26 01.705 -34 15 15.44           ~ 24 0
15 [CBH2011b] G11.92-0.61 MM1 mm 18 13 58.103 -18 54 20.19           ~ 41 0
16 W 33a Y*O 18 14 39.56547 -17 52 02.2260           ~ 746 0
17 IRAS 18151-1208 Y*O 18 17 58.1254 -12 07 24.893           ~ 114 0
18 2MASS J18191220-2047297 Y*O 18 19 12.21 -20 47 29.7           B1 137 0
19 OH 016.59-00.05 Mas 18 21 09.0840 -14 31 48.556           ~ 85 0
20 RAFGL 2136 Y*O 18 22 26.52888 -13 30 14.0400           ~ 300 0
21 [DLW84] G35.2N HII 18 58 13.036 +01 40 36.00           ~ 138 0
22 [UHP2009] VLA G045.4657+00.0453 HII 19 14 25.7 +11 09 26           ~ 31 1
23 QSO B1921-293 BLL 19 24 51.05595254 -29 14 30.1210248   18.71 18.21 15.07   ~ 918 1
24 IRAS 20126+4104 Y*O 20 14 25.8816769656 +41 13 36.879427236           B2.5-B0.5 469 0
25 [HRB81] W75N(Ba) HII 20 38 36.445 +42 37 34.82           ~ 55 0
26 [TGR97] VLA 2 HII 20 38 36.482 +42 37 34.08           ~ 63 0
27 V* V645 Cyg Ae* 21 39 58.2745507632 +50 14 21.042184668   14.23 13.10 13.82   O6/9eq 279 0
28 NAME Cep A HW 2 Y*O 22 56 17.9 +62 01 49           B0.5 243 0
29 [WBN74] NGC 7538 IRS 1 Y*O 23 13 45.318 +61 28 11.69           ~ 433 3

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