2012A&A...541A...7G


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.19CEST18:08:23

2012A&A...541A...7G - Astronomy and Astrophysics, volume 541A, 7-7 (2012/5-1)

Discovery of a parsec-scale bipolar nebula around MWC 349A.

GVARAMADZE V.V. and MENTEN K.M.

Abstract (from CDS):

We report the discovery of a bipolar nebula around the peculiar emission-line star MWC 349A using archival Spitzer Space Telescope 24µm data. The nebula extends over several arcminutes (up to 5pc) and has the same orientation and geometry as the well-known subarcsecond-scale (∼400 times smaller) bipolar radio nebula associated with this star. We discuss the physical relationship between MWC 349A and the nearby B0III star MWC 349B and propose that both stars were members of a hierarchical triple system, which was ejected from the core of the Cyg OB2 association several Myr ago and recently was dissolved into a binary system (now MWC 349A) and a single unbound star (MWC 349B). Our proposal implies that MWC 349A is an evolved massive star (likely a luminous blue variable) in a binary system with a low-mass star. A possible origin of the bipolar nebula around MWC 349A is discussed.

Abstract Copyright:

Journal keyword(s): stars: individual: MWC 349A - stars: winds, outflows - stars: massive - binaries: general - circumstellar matter

Simbad objects: 25

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Number of rows : 25

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 NAME Orion-KL SFR 05 35 14.16 -05 22 21.5           ~ 2025 1
2 NAME Homunculus Nebula ISM 10 45 03.5 -59 41 04           ~ 324 1
3 * eta Car Em* 10 45 03.5455050 -59 41 03.951060 6.37 7.034 6.21 4.90 4.41 OBepec 2219 0
4 WRAY 15-682 WR* 10 53 59.5776214569 -60 26 44.358376205   11.64 10.85 10.56   WN11h 138 3
5 V* AG Car WR* 10 56 11.5779283438 -60 27 12.809532379 7.00 7.57 6.96 7.73   WN11h 595 0
6 NAME Sher 25 star * 11 15 07.6444076894 -61 15 17.608695337   13.63 12.27     B1.5Iab 72 1
7 PN MyCn 18 PN 13 39 35.0560904148 -67 22 51.758576199   13.30 12.54 13.19 12.61 ~ 267 1
8 IRAS 13390-6233 bub 13 42 33.083 -62 48 11.34           ~ 5 0
9 WRAY 16-147 Sy* 14 11 52.0611401558 -51 26 24.183936749     14.20     ~ 222 1
10 IRAS 15127-5811 s*b 15 16 41.0006516530 -58 22 25.958980212   15.34 13.40 12.500 10.91 B1Ia 9 0
11 HD 168607 s*b 18 21 14.8855350307 -16 22 31.760520819 10.23 9.82 8.28 8.55   B9Iaep 174 1
12 HD 168625 s*b 18 21 19.5486475779 -16 22 26.077308888 10.15 9.78 8.37 8.76   B6Iap 251 2
13 [D75b] Em* 19-008 Em* 19 44 37.5995985928 +24 19 05.740988052   16.42 14.64 13.68   ~ 11 1
14 * P Cyg s*b 20 17 47.2020844 +38 01 58.552724 4.66 5.24 4.82 4.28 4.02 B1-2Ia-0ep 1134 1
15 NAME Cyg X Cld 20 28 41 +41 10.2           ~ 632 1
16 IRAS 20290+4052 HII 20 30 50.660 +41 02 27.60           ~ 24 0
17 IRAS 20298+4011 Em* 20 31 42.2841507943 +40 21 59.061205285     15.1     B:I[e] 86 0
18 [CPR2002] A25 * 20 32 38.4433776790 +40 40 44.478529584           O8III 7 0
19 EM* MWC 349B * 20 32 45.2959271434 +40 39 37.415895461     14.3     B0III 29 0
20 EM* MWC 349 ** 20 32 45.499080 +40 39 36.74124   15.88 13.15 12.13   Bep 710 0
21 EM* MWC 349A * 20 32 45.5290328485 +40 39 36.647044678           ~ 146 0
22 Ass Cyg OB 2 As* 20 33.2 +41 19           ~ 799 0
23 BD+43 3654 s*b 20 33 36.0795380204 +43 59 07.362541702   11.24 10.06     O4If 50 0
24 18P 73 Rad 20 36 55.9 +41 36 29           ~ 41 0
25 GRS G081.70 +00.50 SFR 20 39 01.6 +42 19 38           O4.5 948 0

    Equat.    Gal    SGal    Ecl

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2020.10.19-18:08:23

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