| Full text | |
| Author(s): |
Goncalves, Denise R.
[1]
;
Magrini, Laura
[2]
;
Munari, Ulisse
[3]
;
Corradi, Romano L. M.
[4, 5]
;
Costa, Roberto D. D.
[6]
Total Authors: 5
|
| Affiliation: | [1] UFRJ Observ Valongo, BR-20080090 Rio De Janeiro - Brazil
[2] Osserv Astrofis Arcetri, INAF, I-50125 Florence - Italy
[3] Osserv Astron Padova, INAF, I-36012 Asiago, VI - Italy
[4] Inst Astrofis Canarias, E-38205 Tenerife - Spain
[5] Isaac Newton Grp Telescopes, E-38700 Santa Cruz De La Palma - Spain
[6] Univ Sao Paulo, IAG, BR-05508900 Sao Paulo - Brazil
Total Affiliations: 6
|
| Document type: | Journal article |
| Source: | Monthly Notices of the Royal Astronomical Society; v. 391, n. 1, p. L84-L87, NOV 21 2008. |
| Web of Science Citations: | 17 |
| Abstract | |
We report the discovery of the first known symbiotic star in IC10, a starburst galaxy belonging to the Local Group, at a distance of similar to 750 kpc. The symbiotic star was identified during a survey of emission-line objects. It shines at V = 24.62 +/- 0.04, V - R(C) = 2.77 +/- 0.05 and R(C) - I(C) = 2.39 +/- 0.02, and suffers from E(B-V) = 0.85 +/- 0.05 reddening. The spectrum of the cool component well matches that of solar neighbourhood M8III giants. The observed emission lines belong to Balmer series, {[}S II], {[}N II] and {[}O III]. They suggest a low electronic density, negligible optical depth effects and 35 000 < T(eff) < 90 000 K for the ionizing source. The spectrum of the new symbiotic star in IC10 is an almost perfect copy of that of Hen 2-147, a well-known Galactic symbiotic star and Mira. (AU) | |