2020MNRAS.492.2383G


C.D.S. - SIMBAD4 rel 1.7 - 2020.06.02CEST05:10:00

2020MNRAS.492.2383G - Mon. Not. R. Astron. Soc., 492, 2383-2392 (2020/February-3)

HD 93795: a late-B supergiant star with a square circumstellar nebula.

GVARAMADZE V.V., KNIAZEV A.Y., CASTRO N. and KATKOV I.Y.

Abstract (from CDS):

We report the discovery of a square axisymmetric circumstellar nebula around the emission-line star HD 93795 in the archival Spitzer Space Telescope 24 µm data. We classify HD 93795 as a B9 Ia star using optical spectra obtained with the Southern African Large Telescope (SALT). A spectral analysis carried out with the stellar atmosphere code FASTWIND indicates that HD 93795 only recently left the main sequence and is evolving redward for the first time. We discuss possible scenarios for the origin of the nebula and suggest that HD 93795 was originally a binary system and that the nebula was formed because of the merger of the binary components. We also discuss a discrepancy between distance estimates for HD 93795 based on the Gaia data and the possible membership of this star of the Car OB1 association, and conclude that HD 93795 could be at the same distance as Car OB1.

Abstract Copyright: © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): stars: abundances - circumstellar matter - stars: emission-line, Be - stars: individual: HD 93795 - stars: massive - supergiants

Status at CDS:   being processed
// Tables of objects will be appraised for possible ingestion in SIMBAD.

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 - 2020
#notes
1 * ksi02 Cet * 02 28 09.5570589539 +08 27 36.216809306 4.14 4.25 4.30 4.29 4.34 B9III 307 0
2 CPD-69 177 WD* 03 10 31.0201840720 -68 36 03.381441176 10.757 11.413 11.394 11.47 11.558 DA3.0 233 0
3 CPD-69 402 s*b 05 35 27.9799035534 -69 16 10.561668692   12.28 12.24 11.1   B3I 281 1
4 SN 1987A SN* 05 35 28.020 -69 16 11.07   4.75 4.81     SNIIpec 4450 2
5 NAME Car Arm PoG 10 00 -60.0           ~ 377 1
6 Ass Car OB 1 As* 10 38 -59.0           ~ 141 0
7 [SBW2007] 1 ISM 10 40 19.3813745314 -59 49 09.885316446     12.7     B1Iab 30 1
8 NGC 3372 HII 10 44 19.0 -59 53 21           ~ 883 2
9 * eta Car Em* 10 45 03.5455050 -59 41 03.951060 6.37 7.034 6.21 4.90 4.41 OBepec 2191 0
10 HD 93795 Em* 10 48 23.0522491338 -59 32 26.878646266 9.33 9.34 8.90 9.01   B6I 30 0
11 NAME Sher 25 star * 11 15 07.6444076894 -61 15 17.608695337   13.63 12.27     B1.5Iab 72 1
12 IRAS 15127-5811 s*b 15 16 41.0006516530 -58 22 25.958980212   15.34 13.40 12.500 10.91 B1Ia 9 0
13 HD 168625 s*b 18 21 19.5486475779 -16 22 26.077308888 10.15 9.78 8.37 8.76   B6Iap 250 2
14 LP 877-23 PM* 22 52 41.0353308036 -20 35 32.995847106   13.02 11.90     ~ 103 0

    Equat.    Gal    SGal    Ecl

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2020.06.02-05:10:00

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