TY - JOUR
T1 - The period-luminosity relation for the Large Magellanic Cloud Cepheids derived, from Spitzer archival data
AU - Ngeow, C.
AU - Kanbur, S. M.
PY - 2008/5/20
Y1 - 2008/5/20
N2 - 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.
AB - 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.
KW - Cepheids
KW - Distance scale
UR - http://www.scopus.com/inward/record.url?scp=43949103388&partnerID=8YFLogxK
U2 - 10.1086/586704
DO - 10.1086/586704
M3 - 期刊論文
AN - SCOPUS:43949103388
VL - 679
SP - 76
EP - 85
JO - Astrophysical Journal
JF - Astrophysical Journal
SN - 0004-637X
IS - 1
ER -