# 2005A&A...437..217F

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 Query : 2005A&A...437..217F

2005A&A...437..217F - Astronomy and Astrophysics, volume 437, 217-226 (2005/7-1)

Crowded field 3D spectroscopy of LBV candidates in M33.

FABRIKA S., SHOLUKHOVA O., BECKER T., AFANASIEV V., ROTH M. and SANCHEZ S.F.

Abstract (from CDS):

We present integral field spectroscopy of the LBV candidate stars B416 and v532 in the local group galaxy M33. B416 is surrounded by an elongated ring-like nebula, which has a projected radius of 20x30 pc. From the datacube we create ionization and radial velocity maps of the nebula. The excitation of the gas decreases towards the outer part of the ring, while the inner part of the nebula is filled with a more excited gas. In the EW direction the ring is seen to expand with a maximum projected velocity amplitude of about 40km/s. The eastern part approaches the observer. We estimate the nebula dynamical lifetime ∼8x105 years. It could be a residual MS bubble, which indicates a main-sequence or pre-LBV status of the star. We classify B416 as an iron star'' or B[e]-supergiant. In v532 an elongated nebula has been marginally detected. The total projected size of the nebula along the main axis is 30pc, and the total radial velocity gradient is 44±11km/s. v532 exhibits both strong photometric and spectral variability. At the time of our observations it was in an intermediate brightness state with a rich nitrogen spectrum. We classify v532 as an LBV, showing LBV←>Ofpe/WN transitions. We stress the importance of integral field spectroscopy as the optimal technique for studying nebulae and the evolution of LBV-like stars in nearby galaxies.

Journal keyword(s): Local Group - stars: early-type - stars: individual: v 532 - HII regions - stars: individual: B416 - galaxies: individual: M33

CDS comments: parag 3.1 Hen S22 = LHA 120-S 22

Full paper

 Number of rows : 7
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 5637 1
2 [HS80] B416 s*b 01 34 06.5997126912 +30 41 47.600148480 15.118 16.257 16.084 15.858 15.761 O9.5Ia 24 0
3 NAME Romano Star WR* 01 35 09.7011882336 +30 41 57.160957560   16.5 18.04     Ofpe/WN9 51 1
4 DEM L 106 HII 05 13 53.1 -67 27 05           ~ 32 0
5 LHA 120-S 142 WR* 05 44 31.0203138528 -69 20 15.441467316 11.946 12.85 12.71 12.80 12.260 WN11h 30 0
6 WRAY 15-682 WR* 10 53 59.5777329720 -60 26 44.361095316   11.64 10.85 10.56   WN11h 145 3
7 V* AG Car WR* 10 56 11.5781414448 -60 27 12.810673260 7.00 7.57 6.96 7.73   WN11h 621 0

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2023.03.24-16:15:02

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