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

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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

    Equat.    Gal    SGal    Ecl

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2019.12.08-14:37:10

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