2019A&A...626A.126A


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.03CEST23:19:56

2019A&A...626A.126A - Astronomy and Astrophysics, volume 626A, 126-126 (2019/6-1)

A massive nebula around the luminous blue variable star RMC 143 revealed by ALMA.

AGLIOZZO C., MEHNER A., PHILLIPS N.M., LETO P., GROH J.H., NORIEGA-CRESPO A., BUEMI C., CAVALLARO F., CERRIGONE L., INGALLINERA A., PALADINI R., PIGNATA G., TRIGILIO C. and UMANA G.

Abstract (from CDS):

The luminous blue variable (LBV) RMC 143 is located in the outskirts of the 30 Doradus complex, a region rich with interstellar material and hot luminous stars. We report the 3σ sub-millimetre detection of its circumstellar nebula with ALMA. The observed morphology in the sub-millimetre is different than previously observed with HST and ATCA in the optical and centimetre wavelength regimes. The spectral energy distribution (SED) of RMC 143 suggests that two emission mechanisms contribute to the sub-mm emission: optically thin bremsstrahlung and dust. Both the extinction map and the SED are consistent with a dusty massive nebula with a dust mass of 0.055±0.018M (assuming κ850=1.7cm2/g). To date, RMC 143 has the most dusty LBV nebula observed in the Magellanic Clouds. We have also re-examined the LBV classification of RMC 143 based on VLT/X-shooter spectra obtained in 2015/16 and a review of the publication record. The radiative transfer code CMFGEN is used to derive its fundamental stellar parameters. We find an effective temperature of ∼8500K, luminosity of log(L/L)=5.32, and a relatively high mass-loss rate of 1.0x10–5M/yr. The luminosity is much lower than previously thought, which implies that the current stellar mass of ∼8M is comparable to its nebular mass of ∼5.5M (from an assumed gas-to-dust ratio of 100), suggesting that the star has lost a large fraction of its initial mass in past LBV eruptions or binary interactions. While the star may have been hotter in the past, it is currently not hot enough to ionize its circumstellar nebula. We propose that the nebula is ionized externally by the hot stars in the 30 Doradus star-forming region.

Abstract Copyright: © ESO 2019

Journal keyword(s): stars: massive - stars: variables: S Doradus - stars: evolution - stars: individual: RMC143 - stars: mass-loss - dust - extinction

VizieR on-line data: <Available at CDS (J/A+A/626/A126): table1.dat table4.dat list.dat fits/*>

Simbad objects: 45

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Number of rows : 45

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 SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9440 1
2 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5665 1
3 HD 269006 s*b 05 02 07.3944119328 -71 20 13.118657760 9.93 10.60 10.55 10.43 10.38 LBV 232 0
4 HD 268939 s?b 05 04 14.9088131616 -67 15 05.254533820   11.07 11.03 11.12   B:Ie 32 0
5 HD 269050 s*b 05 07 20.4220012957 -68 32 08.572354312 10.593 11.581 11.54 11.46 11.55 B0Ia(e?) 62 0
6 HD 269128 s*b 05 10 22.7894940469 -68 46 23.818379498 9.77 10.52 10.412 10.29 10.268 B2.5Ieq 93 0
7 HD 269227 WR* 05 13 54.2798782060 -69 31 46.659015245 11.429 11.98 11.918 12.13 10.557 WN9/10+M2Ia 151 0
8 HD 269321 s*b 05 17 56.0740517156 -69 16 03.806870993 10.28 10.93 10.84 10.53 10.342 B5Iae 61 0
9 HD 269445 WR* 05 22 59.7854939490 -68 01 46.634598597 10.79 11.77 11.520 11.41 10.979 Ofpe/WN9 109 0
10 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14826 1
11 HD 269582 WR* 05 27 52.6620154151 -68 59 08.486272253 12.206 10.818 11.093 12.70 11.234 WN10h 94 0
12 HD 269604 sg* 05 28 31.3674736900 -68 53 55.748758157   10.87 10.74     A1Ia0 30 0
13 HD 269662 sg* 05 30 51.4755593461 -69 02 58.591230109 10.23 10.52 10.28 10.40 10.390 A0Ia 91 0
14 HD 269700 s*b 05 31 52.2818792698 -68 32 38.856584550 9.71 10.56 10.54 10.38 10.38 B1.5Iaeq 77 0
15 HD 37836 Em* 05 35 16.6331678655 -69 40 38.439677992 9.87 10.736 10.599 10.73 10.164 B0e(q) 73 0
16 SN 1987A SN* 05 35 28.020 -69 16 11.07           SNIIpec 4484 2
17 HD 37974 s*b 05 36 25.8537892343 -69 22 55.789283933 10.056 11.12 10.99 11.00 10.423 B0.5e 114 0
18 HD 269858 s*b 05 36 43.6942807271 -69 29 47.449383685   10.24 10.15 9.95 9.05 LBV 265 2
19 HD 269859 s*b 05 36 47.1879908475 -69 29 52.088446369 9.940 10.761 10.730 11.06   B1Ia 47 1
20 NAME 30 Dor Region reg 05 38.0 -69 06           ~ 178 0
21 RMC 136 Cl* 05 38 42.396 -69 06 03.36           ~ 1734 1
22 CPD-69 463 s*y 05 38 51.6167474749 -69 08 07.314653596 11.93 12.45 12.014     F7Ia 80 1
23 HD 269929 * 05 39 37.8380047562 -70 39 47.042079255   12.44 12.67 12.15 11.47 F8 4 1
24 RMC 149 * 05 39 58.7451762905 -69 44 04.070717721 11.645 12.442 12.517   12.227 O8.5II((f)) 30 0
25 HD 38489 s*b 05 40 13.3208554964 -69 22 46.485104413 11.236 12.295 11.93 11.79 10.891 B[e] 81 1
26 SK -69 279 Em* 05 41 44.6557001998 -69 35 14.904660652 12.079 12.787 12.842 13.03 12.619 OB 45 0
27 LHA 120-S 61 WR* 05 45 51.9393679113 -67 14 25.939050679 10.870 11.86 11.95 12.09 11.931 WN11h 77 0
28 HD 90177 s*b 10 22 53.8426931454 -59 37 28.361118869 9.16 9.66 8 8.15   LBV 303 0
29 * eta Car Em* 10 45 03.5455050 -59 41 03.951060 6.37 7.034 6.21 4.90 4.41 OBepec 2198 0
30 V* AG Car WR* 10 56 11.5779283438 -60 27 12.809532379 7.00 7.57 6.96 7.73   WN11h 590 0
31 MR 35 s*b 11 08 40.0633818066 -60 42 51.718989987   12.33 10.20 11.66   LBV 115 0
32 Cl Westerlund 1 OpC 16 47 04.00 -45 51 04.9           ~ 463 0
33 Cl* Westerlund 1 W 243 s*b 16 47 07.5028508821 -45 52 29.152464693   19.873 15.730     LBV 51 0
34 WRAY 15-1676 pA* 17 19 49.3292317040 -39 10 37.929612963     13.1     ~ 41 1
35 [B61] 2 s*b 17 41 35.4374195439 -30 06 38.782935913   18.0 15.00 14.23 10.30 LBV_B[e]: 43 0
36 [FMM95] 3 s*b 17 46 15.240 -28 50 03.58           LBV 139 1
37 HD 168625 s*b 18 21 19.5486475779 -16 22 26.077308888 10.15 9.78 8.37 8.76   B6Iap 250 2
38 MSX6C G026.4700+00.0207 s*b 18 39 32.2479397055 -05 44 20.194778342           LBV_B 34 1
39 IRAS 18576+0341 s*b 19 00 10.89456 +03 45 47.1096           B8I 80 1
40 * 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 1130 1
41 HD 193793 WR* 20 20 27.9763345925 +43 51 16.289775091 6.90 7.25 6.85 4.58   WC7p+O5 649 1
42 IRAS 20298+4011 Em* 20 31 42.2841507943 +40 21 59.061205285     15.1     B:I[e] 85 0
43 Schulte 12 s*b 20 32 40.9574572449 +41 14 29.276333992 16.1 14.45 11.702     B3-4Ia+ 358 0
44 NML Cyg s*r 20 46 25.5382179476 +40 06 59.396202678   18.64 16.60     M7/8 482 0
45 NAME Local Group GrG ~ ~           ~ 6970 0

    Equat.    Gal    SGal    Ecl

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2020.07.03-23:19:56

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