The Zero Point of Extinction toward Baade's Window from K Giants | Zendy

Andrew Gould | Zendy; Piotr Popowski | Zendy; D. M. Terndrup | Zendy

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The Zero Point of Extinction toward Baade's Window from K Giants

Author(s) -

Andrew Gould,

Piotr Popowski,

D. M. Terndrup

Publication year - 1998

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/305062

Subject(s) - astrophysics , physics , extinction (optical mineralogy) , rr lyrae variable , zero (linguistics) , stars , zero point energy , giant star , astronomy , globular cluster , optics , linguistics , philosophy , quantum mechanics

We measure the zero point of the Stanek (1996) extinction map by comparingthe observed (V-K) colors of 206 K giant stars with their intrinsic (V-K)_0colors as derived from their H\beta indices. We find that the zero point of theStanek map should be changed by \Delta A_V = -0.10 +/- 0.06 mag, obtaining as abonus a three-fold reduction of the previous statistical error. The most directway to test for systematic errors in this determination would be to conduct aparallel measurement based on the (V-K) colors of RR Lyraes (type ab).Comment: 10 pages, 1 figur

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