首页|Mid-infrared Period-Luminosity Relations of Gaia DR3 Long Period Variables

Mid-infrared Period-Luminosity Relations of Gaia DR3 Long Period Variables

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Long period variable(LPV)stars are very promising distance indicators in the infrared bands.We selected asymptotic giant branch(AGB)stars in the Large and Small Magellanic Cloud(LMC and SMC)from the Gaia Data Release 3 LPV catalog,and classified them into oxygen-rich(O-rich)and carbon-rich(C-nch)AGB stars.Using the Wide-field Infrared Survey Explorer database,we determined the W1-and W2-band period-luminosity relations(PLRs)for each pulsation-mode sequence of AGB stars.The dispersion of the PLRs of O-rich AGB stars in sequences C'and C is relatively small,around 0.14 mag.The PLRs of LMC and SMC are consistent in each sequence.In the W2 band,the PLR of large-amplitude C-rich AGB stars is steeper than that of small-amplitude C-rich AGB stars,due to their more circumstellar dust.By two methods,we find that some PLR sequences of O-rich AGB stars in the LMC are dependent on metallicity.The coefficients of the metallicity effect are β=-0.533±0.213 mag dex1 and β=-0.767±0.158 mag dex1 for sequence C in W1 and W2 bands,respectively.The significance of the metallicity effect in W1 band for the four sequences is 2.2-3.5σ.Both of these imply that distance measurements using O-rich Mira may need to take the metallicity effect into account.

stars:variables:generalstars:distancesinfrared:stars

Xiaohan Chen、Xiaodian Chen、Licai Deng、Shu Wang、Tianlu Chen

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Department of Physics,College of Science,Tibet University,Lhasa 850000,China

Key Laboratory of Cosmic Rays(Tibet University),Ministry of Education,Lhasa 850000,China

CAS Key Laboratory of Optical Astronomy,National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China

School of Astronomy and Space Science,University of the Chinese Academy of Sciences,Beijing 100049,China

Department of Astronomy,China West Normal University,Nanchong 637009,China

Institute for Frontiers in Astronomy and Astrophysics,Beijing Normal University,Beijing 102206,China

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National Natural Science Foundation of China(NSFC)National Natural Science Foundation of China(NSFC)National Natural Science Foundation of China(NSFC)National Natural Science Foundation of China(NSFC)National Natural Science Foundation of China(NSFC)Youth Innovation Promotion Association of the Chinese Academy of SciencesYouth Innovation Promotion Association of the Chinese Academy of SciencesNational Key Research and Development Program of ChinaNational Key Research and Development Program of Chinaprojects of the Jet Propulsion Laboratory/California Institute of TechnologyNational Aeronautics and Space Administration

1217304712322306120030461223300912133002202205520230652022YFF05034042019YFA0405504

2024

10.1088/1674-4527/ad462c

天文和天体物理学研究
中国科学院国家天文台

天文和天体物理学研究

CSTPCD
影响因子：0.406
ISSN：1674-4527
年,卷(期)：2024.24(7)