2014MNRAS.443L..94L

Query : 2014MNRAS.443L..94L

2014MNRAS.443L..94L - Mon. Not. R. Astron. Soc., 443, L94-L98 (2014/September-1)

Discovery of a Thorne-Zytkow object candidate in the Small Magellanic Cloud.

LEVESQUE E.M., MASSEY P., ZYTKOW A.N. and MORRELL N.

Abstract (from CDS):

Thorne-Zytkow objects (TZOs) are a theoretical class of star in which a compact neutron star is surrounded by a large, diffuse envelope. Supergiant TZOs are predicted to be almost identical in appearance to red supergiants (RSGs). The best features that can be used at present to distinguish TZOs from the general RSG population are the unusually strong heavy-element and Li lines present in their spectra, products of the star's fully convective envelope linking the photosphere with the extraordinarily hot burning region in the vicinity of the neutron star core. Here, we present our discovery of a TZO candidate in the Small Magellanic Cloud. It is the first star to display the distinctive chemical profile of anomalous element enhancements thought to be unique to TZOs. The positive detection of a TZO will provide the first direct evidence for a completely new model of stellar interiors, a theoretically predicted fate for massive binary systems, and never-seen-before nucleosynthesis processes that would offer a new channel for Li and heavy-element production in our Universe.

Abstract Copyright: © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2014)

Journal keyword(s): stars: peculiar - supergiants

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 - 2026 		#notes
1 PMMR 9 s*r 00 45 04.5711929352 -73 05 27.513231936 16.88 14.85 12.84     M1.5Ia 37 0
2 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
3 SV* HV 2112 Mi* 01 10 03.8526682872 -72 36 52.585541676 18.72 18.39 16.59 15.80 11.06 M5II-III 51 2
4 V* S Per s*r 02 22 51.7113133056 +58 35 11.422774248 13.22 10.55 7.90     M4.5-7Iae 388 0
5 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
6 LP 995-86 Pe* 03 48 22.6125679056 -39 08 37.013680104   13.61 13.15     F 104 0
7 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
8 L 595-22 Pe* 05 56 24.7419040752 -27 51 32.361761700   12.31 12.38     sdG 171 0
9 V* U Aqr RC* 22 03 19.6990459464 -16 37 35.281076700   12.16 11.17     C-Hd 106 0
10 EGGR 264 WD* 23 19 35.3881861344 -17 05 28.465573380 13.279 14.132 14.111 14.07 14.049 DB3 131 0
11 Feige 110 HS* 23 19 58.3996844256 -05 09 56.171142864 10.360 11.45 11.50 11.970 12.145 sdO8VIIIHe5 673 1
12 NAME Local Group GrG ~ ~           ~ 9325 0

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