2005A&A...437L...1U


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.11CET22:17:01

2005A&A...437L...1U - Astronomy and Astrophysics, volume 437, L1-5 (2005/7-1)

Current day mass loss rate for Luminous Blue Variable IRAS 18576+0341.

UMANA G., BUEMI C.S., TRIGILIO C. and LETO P.

Abstract (from CDS):

In this letter we report on the first set of multi-frequency and high angular resolution radio observations of IRAS 18576+0341. The radio observations have revealed an extended, asymmetric and quite structured radio nebula and allowed us to locate the central core of this highly obscured new galactic Luminous Blue Variable. From the analysis of radio properties of IRAS 18576+0341 estimates of important physical parameters of the central star have been determined. In particular, an effective temperature of Teff~(2.6±0.2)x104K, corresponding to a B0-B0.5 supergiant, has been derived. The most notable result is the determination of the current day mass-loss ({dot}(M)=3.7x10–5M/yr), which is of particular importance since mass-loss rate determination from radio observations appears to be a more reliable method compared to the others based on different diagnostics.

Abstract Copyright:

Journal keyword(s): circumstellar matter - stars: winds, outflows - stars: mass-loss - radio continuum: stars - stars: individual: IRAS 18576+0341, AFGL 2298

Simbad objects: 7

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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 - 2020
#notes
1 3C 48 QSO 01 37 41.2995845985 +33 09 35.079126038   16.62 16.20     ~ 2431 2
2 HD 90177 s*b 10 22 53.8426931454 -59 37 28.361118869 9.16 9.66 8 8.15   LBV 300 0
3 * eta Car Em* 10 45 03.5455050 -59 41 03.951060 6.37 7.034 6.21 4.90 4.41 OBepec 2150 0
4 QSO J1824+1044 Bla 18 24 02.85524914 +10 44 23.7739931   17.66 17.27 16.71   ~ 147 1
5 NVSS J185146+003532 Rad 18 51 46.72295 +00 35 32.3649           ~ 51 1
6 IRAS 18576+0341 s*b 19 00 10.89456 +03 45 47.1096           B8I 80 1
7 * 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 1126 1

    Equat.    Gal    SGal    Ecl

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2019.11.11-22:17:01

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