2014A&A...568A..28L


Query : 2014A&A...568A..28L

2014A&A...568A..28L - Astronomy and Astrophysics, volume 568A, 28-28 (2014/8-1)

New objects with the B[e] phenomenon in the Large Magellanic Cloud.

LEVATO H., MIROSHNICHENKO A.S. and SAFFE C.

Abstract (from CDS):

The study is aimed at discovering new objects with the B[e] phenomenon in the Large Magellanic Cloud. We report medium-resolution optical spectroscopic observations of two newly found (ARDB54 and NOMAD0181-0125572) and two previously known (HenS-59 and HenS-137) supergiants with the B[e] phenomenon in the Large Magellanic Cloud. The observations were obtained with the GMOS spectrograph at the southern Gemini telescope. The optical spectra and the fundamental parameters of ARDB54 and NOMAD0181-0125572 are presented for the first time. We found that the Balmer line profiles of HenS-59 and HenS-137 were different from those observed in their spectra nearly 20 years ago. We suggest a higher effective temperature and luminosity for both objects. With the new fundamental parameters, the lowest luminosity for known supergiants with the B[e] phenomenon in the Magellanic Clouds is higher that previously thought (logL/L∼4.5 instead of 4.0). The object HenS-59 may be a binary system based on its UV excess, variable B-V color-index and radial velocity of emission lines, and periodically variable I-band brightness.

Abstract Copyright:

Journal keyword(s): stars: early-type - stars: emission-line, Be - supergiants - techniques: spectroscopic - Magellanic Clouds - matter circumstellar

Simbad objects: 14

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Number of rows : 14
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 LHA 115-S 6 s*b 00 46 55.0295765376 -73 08 34.136808252 12.14 13.02 12.91   12.52 B0/0.5[e] 84 1
2 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 11178 1
3 LHA 115-S 18 LP* 00 54 09.5410003368 -72 41 43.289017440 12.94 13.48 13.82   12.55 B[e] 82 0
4 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7084 0
5 HD 268605 s*b 04 50 18.9258130824 -67 39 38.036838240 10.244 11.2 11.377   11.322 O9.5/B0Ia 86 0
6 ARDB 54 sg* 04 54 43.4503879872 -70 21 27.447678288 12.80 12.96 12.71 12.38   B9Ib 10 0
7 HD 268835 s*b 04 56 47.0795205816 -69 50 24.769621212 10.21 10.77 10.63 10.72 10.16 B8[e] 111 0
8 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 17478 0
9 NOMAD1 0181-0125572 * 05 27 50.4560 -71 50 20.620 13.63 14.34 14.24     ~ 1 0
10 HD 37974 s*b 05 36 25.8534763728 -69 22 55.789571064 10.056 11.12 10.99 11.00 10.423 B0.5e 123 0
11 NOMAD1 0203-0138943 * 05 38 25.0567 -69 40 33.660           ~ 1 0
12 LHA 120-S 137 LP* 05 41 43.7413000056 -69 37 38.284959504 13.504 14.305 14.199 14.310 13.463 BIaePCyg 17 0
13 NOMAD1 0218-0100858 * 05 44 19.3140 -68 10 08.130           ~ 1 0
14 LHA 120-S 59 LP* 05 45 29.4736086984 -68 11 45.924524268 13.367 14.22 13.95 14.23 13.651 B0.5IIIe 20 0

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