The physics behind the non-linearity of the cepheid period-luminosity relation

S. Kanbur; C. Ngeow

The physics behind the non-linearity of the cepheid period-luminosity relation

S. Kanbur, C. Ngeow

天文研究所

研究成果: 雜誌貢獻 › 會議論文 › 同行評審

3 引文斯高帕斯（Scopus）

摘要

Recent observational work has suggested that the Cepheid period-luminosity (PL) relation in the LMC is non-linear. This is because the period-colour (PC) relation in the LMC is also non-linear leading to a non-linear LMC PL relation. We present a possible theoretical explanation for the break in the PC relation. Our explanation relies on the interaction of the hydrogen ionization front with the Cepheid photosphere and the way this interaction changes with phase of pulsation and metallicity to produce the observed changes in the Cepheid PC and PL relation.

原文	???core.languages.en_GB???
頁（從 - 到）	691-693
頁數	3
期刊	European Space Agency, (Special Publication) ESA SP
發行號	576
出版狀態	已出版 - 2005
事件	Symposium - The Three-Dimensional Universe with Gaia - Paris, France 持續時間: 4 10月 2004 → 7 10月 2004

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abstract = "Recent observational work has suggested that the Cepheid period-luminosity (PL) relation in the LMC is non-linear. This is because the period-colour (PC) relation in the LMC is also non-linear leading to a non-linear LMC PL relation. We present a possible theoretical explanation for the break in the PC relation. Our explanation relies on the interaction of the hydrogen ionization front with the Cepheid photosphere and the way this interaction changes with phase of pulsation and metallicity to produce the observed changes in the Cepheid PC and PL relation.",

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T1 - The physics behind the non-linearity of the cepheid period-luminosity relation

AU - Kanbur, S.

AU - Ngeow, C.

PY - 2005

Y1 - 2005

N2 - Recent observational work has suggested that the Cepheid period-luminosity (PL) relation in the LMC is non-linear. This is because the period-colour (PC) relation in the LMC is also non-linear leading to a non-linear LMC PL relation. We present a possible theoretical explanation for the break in the PC relation. Our explanation relies on the interaction of the hydrogen ionization front with the Cepheid photosphere and the way this interaction changes with phase of pulsation and metallicity to produce the observed changes in the Cepheid PC and PL relation.

AB - Recent observational work has suggested that the Cepheid period-luminosity (PL) relation in the LMC is non-linear. This is because the period-colour (PC) relation in the LMC is also non-linear leading to a non-linear LMC PL relation. We present a possible theoretical explanation for the break in the PC relation. Our explanation relies on the interaction of the hydrogen ionization front with the Cepheid photosphere and the way this interaction changes with phase of pulsation and metallicity to produce the observed changes in the Cepheid PC and PL relation.

KW - Cepheid

KW - Distance Scale

KW - Stellar Structure and Pulsation

UR - http://www.scopus.com/inward/record.url?scp=23744503570&partnerID=8YFLogxK

M3 - 會議論文

AN - SCOPUS:23744503570

SN - 0379-6566

SP - 691

EP - 693

JO - European Space Agency, (Special Publication) ESA SP

JF - European Space Agency, (Special Publication) ESA SP

IS - 576

T2 - Symposium - The Three-Dimensional Universe with Gaia

Y2 - 4 October 2004 through 7 October 2004

ER -

The physics behind the non-linearity of the cepheid period-luminosity relation

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