Towards a Determination of Definitive Parameters for the Long Period Cepheid S Vulpeculae

Autor:	Turner, David G.
Rok vydání:	2014
Předmět:	Astrophysics - Solar and Stellar Astrophysics Astrophysics - Galaxy Astrophysics
Druh dokumentu:	Working Paper
Popis:	A new compilation of UBV data for stars near the Cepheid S Vul incorporates BV observations from APASS and NOMAD to augment UBV observations published previously. A reddening analysis yields mean colour excesses and distance moduli for two main groups of stars in the field: the sparse cluster Turner 1 and an anonymous background group of BA stars. The former appears to be 1.07+-0.12 kpc distant and reddened by E(B-V)=0.45+-0.05, with an age of 10^9 yrs. The previously overlooked latter group is 3.48+-0.19 kpc distant and reddened by E(B-V)=0.78+-0.02, with an age of 1.3x10^7 yrs. Parameters inferred for S Vul under the assumption that it belongs to the distant group, as also argued by 2MASS data, are all consistent with similar results for other cluster Cepheids and Cepheid-like supergiants. Comment: Accepted for publication (Odessa Astronomical Publications)
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1403.1968 Zobrazit plný text záznamu View this record from Arxiv