2000A&AS..144..379M


C.D.S. - SIMBAD4 rel 1.7 - 2021.05.17CEST18:16:53

2000A&AS..144..379M - Astron. Astrophys., Suppl. Ser., 144, 379-389 (2000/June-2)

AS 314: a dusty A-type hypergiant.

MIROSHNICHENKO A.S., CHENTSOV E.L. and KLOCHKOVA V.G.

Abstract (from CDS):

We present the results of our observations of the poorly-studied emission-line star AS 314 which include high-resolution spectroscopy, obtained at the 6-meter telescope of the Russian Academy of Sciences, multicolor optical and near-infrared photometry. The strong Hα line, Hβ and Hγ of moderate strength and a number of weak Fe II lines were detected in emission. The Balmer lines and most of the Fe II lines show narrow PCyg-type profiles which implies a very low terminal velocity of the stellar wind. Very weak signs of emission are found in Hδ. Photospheric lines detected for the first time allowed us to determine the object's spectral type, A0. The luminosity, Mbol~-8.0mag was estimated using several methods and implies that AS 314 is a hypergiant, which is located at about 10kpc from the Sun and has an initial mass of ∼20M. Modeling of the Balmer line profiles resulted in the following parameters of the stellar wind: {dot}(M) = 2x10–5 M/yr, v=75km/s. The star is located within the LBV strip in the HRD. Its noticeable far-IR excess is due to the circumstellar dust emission and is likely evidence of an LBV-type outburst in the past.

Abstract Copyright:

Journal keyword(s): stars: emission-line - stars: supergiants - circumstellar matter - stars: mass-loss - stars: individual: AS 314

Simbad objects: 12

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Number of rows : 12

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 ACO S 314 ClG 02 58 12.9 -42 45 24           ~ 6 0
2 HD 90177 s*b 10 22 53.8426931454 -59 37 28.361118869 9.16 9.66 8 8.15   LBV 310 0
3 V* AG Car WR* 10 56 11.5779283438 -60 27 12.809532379 7.00 7.57 6.96 7.73   WN11h 602 0
4 MR 35 s*b 11 08 40.0633818066 -60 42 51.718989987   12.33 10.20 11.66   LBV 119 0
5 HD 160529 sg* 17 41 59.0257256544 -33 30 13.702939546 8.17 7.87 6.66 5.50 4.51 A2Ia 189 1
6 HD 168607 s*b 18 21 14.8855350307 -16 22 31.760520819 10.23 9.82 8.28 8.55   B9Iaep 176 1
7 HD 168625 s*b 18 21 19.5486475779 -16 22 26.077308888 10.15 9.78 8.37 8.76   B6Iap 258 2
8 LDN 379 DNe 18 30 34.0 -15 15 10           ~ 34 0
9 HR 6989 ** 18 38 04.4789647691 -14 00 17.183935558   6.68 6.47     B8II/III 32 1
10 BD-13 5061 sg* 18 39 26.1023386431 -13 50 47.162584517 10.86 10.75 9.89 9.98   B9Ia 34 1
11 LDN 410 DNe 18 42.8 -13 27           ~ 3 0
12 BD+14 3887 Em* 19 21 33.9773483922 +14 52 56.908316938 11.86 11.3 9.89     B3Ibe 82 0

    Equat.    Gal    SGal    Ecl

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2021.05.17-18:16:53

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