2011AJ....142...87E

Query : 2011AJ....142...87E

2011AJ....142...87E - Astron. J., 142, 87 (2011/September-0)

The orbit of the Cepheid V350 Sgr revisited.

EVANS N.R., BERDNIKOV L., GORYNYA N., RASTORGUEV A. and EATON J.

Abstract (from CDS):

"The Cepheid Mass Problem" is one of the fundamental tests of the understanding of stellar evolution. One of the foundations of measured masses for Cepheids for this question is binary orbits. V350 Sgr is a classical Cepheid in a binary system. New radial velocity data for the system have been obtained over the last several years, and are used to update the orbit. The secondary in the system has previously had its orbital velocity amplitude measured in the ultraviolet with the Hubble Space Telescope. This amplitude has been combined with the new orbit and the adopted mass of the secondary resulting in a Cepheid mass of 5.0±0.8 M☉.

Abstract Copyright: ∼

Journal keyword(s): binaries: spectroscopic - stars: massive - stars: variables: Cepheids

VizieR on-line data: <Available at CDS (J/AJ/142/87): table1.dat table4.dat>

Simbad objects: 10

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Number of rows : 10
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 * alf UMi cC* 02 31 49.09456 +89 15 50.7923 3.00 2.62 2.02 1.53 1.22 F8Ib 716 2
2 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
3 V* S Mus cC* 12 12 47.0199008472 -70 09 06.439196664 7.58 8.80 8.33 7.39 5.196 F6Ib+B5V 275 0
4 * alf Boo RG* 14 15 39.67207 +19 10 56.6730 2.46 1.18 -0.05 -1.03 -1.68 K1.5IIIFe-0.5 2417 1
5 * gam01 Sgr cC* 18 05 01.2264355704 -29 34 48.322222356 5.99 5.47 4.69   3.869 G0Ib/II 366 0
6 V* V350 Sgr cC* 18 45 17.4968424336 -20 38 50.552766852   8.321 7.450 8.41 6.421 F8Ib/II 231 0
7 V* FF Aql cC* 18 58 14.7483041520 +17 21 39.297557628 6.61 6.18 5.38     F6Ib 380 0
8 V* SU Cyg cC* 19 44 48.7341456312 +29 15 52.895535048 7.10 6.88 6.44 6.06 5.84 F2Iab:+B8.0V 312 0
9 * del Cep cC* 22 29 10.2626640314 +58 24 54.697613650 4.71 4.35 3.75   3.219 F5Iab:+B7-8 763 0
10 V* Z Lac cC* 22 40 52.1457028632 +56 49 46.083774432   9.71 8.57   7.164 F6Ib 245 0

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