首页|Can near-to-mid Infrared Spectral Energy Distribution Quantitatively Trace Protoplanetary Disk Evolution?

Can near-to-mid Infrared Spectral Energy Distribution Quantitatively Trace Protoplanetary Disk Evolution?

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Infrared(IR)spectral energy distribution(SED)is the major tracer of protoplanetary disks.It was recently proposed to use the near-to-mid IR(or K-24)SED slope α defined between 2 and 24μm as a potential quantitative tracer of disk age.We critically examine the viability of this idea and confront it with additional statistics of IR luminosities and SED shapes.We point out that,because the statistical properties of most of the complicated physical factors involved in disk evolution are still poorly understood in a quantitative sense,the only viable way is to assume them to be random so that an idealized"average disk"can be defined,which allows the α histogram to trace its age.We confirm that the statistics of the zeroth order(luminosity),first order(slope α),and second order characteristics(concavity)of the observed K-24 SEDs indeed carry useful information upon the evolutionary processes of the"average disk".We also stress that intrinsic diversities in K-24 SED shapes and luminosities are always large at the level of individual stars so that the application of the evolutionary path of the"average disk"to individual stars must be done with care.The data of most curves in plots are provided on GitHub(Disk-age package https://github.com/starage/disk-age/).

stars:formationstars:pre-main sequencestars:protostarsinfrared:starsprotoplanetary disks

刘明超、何金华、Zhen Guo、葛继兴、唐雨平

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Yunnan Observatories,Chinese Academy of Sciences,Kunming 650216,China

Chinese Academy of Sciences South America Center for Astronomy,National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China

University of Chinese Academy of Sciences,Beijing 100049,China

Departamento de Astronomía,Universidad de Chile,Las Condes,7591245 Santiago,Chile

Instituto de Física y Astronomía,Universidad de Valparaíso,ave.Gran Bretaña,1111,Casilla 5030,Valparaíso,Chile

Centre for Astrophysics Research,University of Hertfordshire,Hatfield AL10 9AB,UK

Millennium Institute of Astrophysics,Nuncio Monseñor Sotero Sanz 100,Of.104,Providencia,Santiago,Chile

Xinjiang Astronomical Observatory,Chinese Academy of Sciences,Urumqi 830011,China

Xinjiang Key Laboratory of Radio Astrophysics,Urumqi 830011,China

Shanghai Key Lab for Astrophysics,Shanghai Normal University,Shanghai 200234,China

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Natural Science Foundation of Yunnan ProvinceANID FONDECYT Postdoctoral programANID,—Millennium Science Initiative ProgramChinese Academy of Sciences(CAS)CAS South America Center for Astronomy(CASSACA)in Santiago,Chile

202 201BC0700033 220 029NCN19_171

2024

10.1088/1674-4527/ad4b5c

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)