New NIR light-curve templates for classical Cepheids

We present new near-infrared (NIR) light-curve templates for fundamental (FU, JHK) and first overtone (FO, J) Cepheids. The new templates together with PL and PW relations provide Cepheid distances from single-epoch observations with a precision only limited by the intrinsic accuracy of the method a...

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Published in:arXiv.org 2015-03
Main Authors: Inno, L, Matsunaga, N, Romaniello, M, Bono, G, Monson, A, Ferraro, I, Iannicola, G, Persson, E, Buonanno, R, Freedman, W, Gieren, W, Groenewegen, M A T, Ita, Y, Laney, C D, Lemasle, B, Madore, B F, Nagayama, T, Nakada, Y, Nonino, M, Pietrzynski, G, Primas, F, Scowcroft, V, Soszynski, I, Tanabe, T, Udalski, A
Format: Article
Language:English
Subjects:
Cepheid variables
Fourier series
Infrared radiation
Light
Light curve
Magellanic clouds
Mathematical analysis
Periodic functions
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Summary:We present new near-infrared (NIR) light-curve templates for fundamental (FU, JHK) and first overtone (FO, J) Cepheids. The new templates together with PL and PW relations provide Cepheid distances from single-epoch observations with a precision only limited by the intrinsic accuracy of the method adopted. The templates rely on a very large set of Galactic and Magellanic Clouds (MCs) Cepheids (FU,~600; FO,~200) with well sampled NIR (IRSF data) and optical (V,I; OGLE data) light curves. To properly trace the change in the shape of the light curve as a function of period, we split the sample of calibrating Cepheids into 10 different period bins. The templates for the first time cover FO Cepheids and the FU short-period Cepheids (P
ISSN:2331-8422
DOI:10.48550/arxiv.1410.5460