THE MID-INFRARED PERIOD-LUMINOSITY RELATIONS FOR THE SMALL MAGELLANIC CLOUD CEPHEIDS DERIVED FROM SPITZER ARCHIVAL DATA

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題名:	THE MID-INFRARED PERIOD-LUMINOSITY RELATIONS FOR THE SMALL MAGELLANIC CLOUD CEPHEIDS DERIVED FROM SPITZER ARCHIVAL DATA
作者:	Ngeow,CC;Kanbur,SM
貢獻者:	天文研究所
關鍵詞:	GRAVITATIONAL LENSING EXPERIMENT.;FUNDAMENTAL-MODE CEPHEIDS;AMPLITUDE-COLOR RELATIONS;OGLE-III CATALOG;CLASSICAL CEPHEIDS;HUBBLE CONSTANT;SPACE-TELESCOPE;DARK ENERGY;LEAVITT LAW;LMC DATA
日期:	2010
上傳時間:	2012-03-27 18:10:22 (UTC+8)
出版者:	國立中央大學
摘要:	In this paper, we derive the Spitzer IRAC band period luminosity (P-L) relations for the Small Magellanic Cloud (SMC) Cepheids, by matching the Spitzer archival SAGE-SMC data with the OGLE-III SMC Cepheids. We find that the 3.6 mu m and 4.5 mu m band P L relations can be better described using two P-L relations with a break period at log(P) = 0.4: this is consistent with similar results at optical wavelengths for SMC P-L relations. The 5.8 mu m and 8.0 mu m band P-L relations do not extend to sufficiently short periods to enable a similar detection of a slope change at log(P) = 0.4. The slopes of the SMC P-L relations, for log(P) > 0.4, are consistent with their Large Magellanic Cloud counterparts that were derived from a similar data set. They are also in agreement with those obtained from a small sample of Galactic Cepheids with parallax measurements.
關聯:	ASTROPHYSICAL JOURNAL
顯示於類別:	[天文研究所] 期刊論文

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