2015A&A...574A.139W

C.D.S. - SIMBAD4 rel 1.7 - 2019.12.08CET14:37:10

2015A&A...574A.139W - Astronomy and Astrophysics, volume 574A, 139-139 (2015/2-1)

Investigating the nature of the Fried Egg nebula. CO mm-line and optical spectroscopy of IRAS 17163-3907.

WALLSTROEM S.H.J., MULLER S., LAGADEC E., BLACK J.H., OUDMAIJER R.D., JUSTTANONT K., VAN WINCKEL H. and ZIJLSTRA A.A.

Abstract (from CDS):

Through CO mm-line and optical spectroscopy, we investigate the properties of the Fried Egg nebula IRAS 17163-3907, which has recently been proposed to be one of the rare members of the yellow hypergiant class. The CO J=2-1 and J=3-2 emission arises from a region within 20" of the star and is clearly associated with the circumstellar material. The CO lines show a multi-component asymmetrical profile, and an unexpected velocity gradient is resolved in the east-west direction, suggesting a bipolar outflow. This is in contrast with the apparent symmetry of the dust envelope as observed in the infrared. The optical spectrum of IRAS 17163-3907 between 5100 and 9000Å was compared with that of the archetypal yellow hypergiant IRC+10420 and was found to be very similar. These results build on previous evidence that IRAS 17163-3907 is a yellow hypergiant.

Abstract Copyright: ∼

Journal keyword(s): circumstellar matter - stars: AGB and post-AGB - stars: mass-loss - stars: individual: IRAS 17163-3907

Simbad objects: 11

Full paper

View the reference in ADS

Number of rows : 11

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2020	#notes
1	SH 2-4	HII	17 18 23.9	-39 19 10						~	82	4
2	WRAY 15-1666	WR*	17 18 52.8750745581	-38 50 03.606959080	13.93	13.27	11.83	11.43		WN7	64	0
3	CD-38 11746	WR*	17 19 00.5230727136	-38 48 51.250086613	13.01	12.48	11.02	10.55		WN8h	87	0
4	RCW 122C	IR	17 19 20	-39 03.7						~	6	0
5	WRAY 15-1676	pA*	17 19 49.3292317040	-39 10 37.929612963			13.1			~	40	1
6	BFS 65	HII	17 20 05.8	-38 57 37						~	72	0
7	WR 91	WR*	17 20 22.0232742995	-38 56 48.379201459		17.70	16.2			WN7	31	0
8	HD 179821	pA*	19 13 58.6083165753	+00 07 31.934676028	10.81	9.694	8.19			G4_0-Ia	218	0
9	BD+14 3887	Em*	19 21 33.9773483922	+14 52 56.908316938	11.86	11.3	9.89			B3Ibe	76	0
10	IRC +10420	pA*	19 26 48.0981288433	+11 21 16.756524951		13.98	11.66			F8Ia+e	448	0
11	* rho Cas	LP*	23 54 23.0339951270	+57 29 57.766930774	7.00	5.85	4.59	3.63	2.89	G2_0	358	0

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