2008/01/09 by Chow‐Choong Ngeow, C. Ngeow, S. Kanbur +1 · 1 citation
Physics and Astronomy · #Astronomy #Astrophysics #Cepheid variable #Galaxies: Formation, Evolution, Phenomena #Galaxy #Large Magellanic Cloud #Luminosity #Period (music) #Physics #Spitzer Space Telescope #Stars #Stellar, planetary, and galactic studies #Telescope #astro-ph
paper · pdf · doi:10.1086/586704
10 pages, 11 figures and 6 tables, ApJ accepted
arxiv created 2008/01/09 · openalex publication_date 2008/05/13 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
Using Spitzer archival data from the SAGE (Surveying the Agents of a Galaxy's Evolution) program, we derive the Cepheid period-luminosity (P-L) relation at 3.6, 4.5, 5.8, and 8.0 μm for Large Magellanic Cloud (LMC) Cepheids. These P-L relations can be used, for example, in future extragalactic distance scale studies carried out with the James Webb Space Telescope . We also derive Cepheid period-color (P-C) relations in these bands and find that the slopes of the P-C relations are relatively flat. We test the nonlinearity of these P-L relations with the F -statistical test and find that the 3.6, 4.5, and 5.8 μm P-L relations are consistent with linearity. However, the 8.0 μm P-L relation presents possible but inconclusive evidence of nonlinearity.