Theoretical isochrones with extinction in the K band. II. J - K versus K

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dc.contributor.author Kim, Sungsoo en_US
dc.contributor.author Figer, Donald en_US
dc.contributor.author Lee, Myung Gyoon en_US
dc.date.accessioned 2006-06-09T13:41:12Z en_US
dc.date.available 2006-06-09T13:41:12Z en_US
dc.date.issued 2006-01 en_US
dc.identifier.citation Publications of the Astronomical Society of the Pacific 118 (2006) 62-76 en_US
dc.identifier.issn 1538-3873 en_US
dc.identifier.uri http://hdl.handle.net/1850/1965 en_US
dc.description Also archived in: arXiv:astro-ph/0601470 v1 20 Jan 2006 en_US
dc.description.abstract We calculate theoretical isochrones in a consistent way for five filter pairs near the J and K band atmospheric windows (J–K, J–K′, J–Ks, F110W–F205W, and F110W–F222M) using the Padova stellar evolutionary models of Girardi et al. We present magnitude transformations between various K-band filters as a function of color. Isochrones with extinction of up to 6 mag in the K band are also presented. As found for the filter pairs composed of H & K band filters, we find that the reddened isochrones of different filter pairs behave as if they follow different extinction laws, and that the extinction curves of Hubble Space Telescope NICMOS filter pairs in the color-magnitude diagram are considerably nonlinear. Because of these problems, extinction values estimated with NICMOS filters can be in error by up to 1.3 mag. Our calculation suggests that the extinction law implied by the observations of Rieke et al for wavelengths between the J and K bands is better described by a power-law function with an exponent of 1.66 instead of 1.59, which is commonly used with an assumption that the transmission functions of J and K filters are Dirac delta functions. (Refer to PDF file for exact formulas). en_US
dc.description.sponsorship S. S. K. was supported by the Astrophysical Research Center for the Structure and Evolution of the Cosmos (ARCSEC) of the Korea Science and Engineering Foundation through the Science Research Center (SRC) program. M. G. L. was in part supported by the ABRL (R14-2002-058-01000-0) and the BK21 program. en_US
dc.format.extent 742766 bytes en_US
dc.format.mimetype application/pdf en_US
dc.language.iso en_US en_US
dc.publisher University of Chicago Press: Publications of the Astronomical Society of the Pacific en_US
dc.relation.ispartofseries vol. 118 en_US
dc.relation.ispartofseries no. 1 en_US
dc.relation.ispartofseries issue 839 en_US
dc.relation.ispartofseries pps. 62-76 en_US
dc.subject Hertzsprung-Russell diagram en_US
dc.subject Stars-fundamental parameters en_US
dc.subject Stars-infrared en_US
dc.subject Techniques-photometric en_US
dc.title Theoretical isochrones with extinction in the K band. II. J - K versus K en_US
dc.type Article en_US

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