Evaluation of the Single-component Thermal Dust Emission Model in Cosmic Microwave Background Experiments
It is well known that multiple Galactic thermal dust emission components may exist along the line of sight, but a single-component approximation is still widely used, since a full multicomponent estimation requires a large number of frequency bands that are only available with future experiments. In...
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IOP Publishing
2025-01-01
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| Series: | The Astrophysical Journal Supplement Series |
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| Online Access: | https://doi.org/10.3847/1538-4365/ad96b8 |
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| author | Hao Liu Jia-Rui Li Yi-Fu Cai |
| author_facet | Hao Liu Jia-Rui Li Yi-Fu Cai |
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| description | It is well known that multiple Galactic thermal dust emission components may exist along the line of sight, but a single-component approximation is still widely used, since a full multicomponent estimation requires a large number of frequency bands that are only available with future experiments. In light of this, we present a reliable, quantitative, and sensitive criterion to test the goodness of all kinds of dust emission estimations. This can not only give a definite answer to the quality of current single-component approximations but also help determine preconditions of future multicomponent estimations. Upon the former, previous works usually depend on a more complicated model to improve the single-component dust emission; however, our method is free from any additional model, and is sensitive enough to directly discover a substantial discrepancy between the Planck High Frequency Instrument data (100–857 GHz) and associated single-component dust emission estimations. This is the first time that the single-component estimation is ruled out by the data itself. For the latter, a similar procedure will be able to answer two important questions for estimating the complicated Galactic emissions: the number of necessary foreground components and their types. |
| format | Article |
| id | doaj-art-54aa4d8ca3c749bea8314205b89b27a0 |
| institution | Kabale University |
| issn | 0067-0049 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
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| series | The Astrophysical Journal Supplement Series |
| spelling | doaj-art-54aa4d8ca3c749bea8314205b89b27a02025-01-21T15:40:56ZengIOP PublishingThe Astrophysical Journal Supplement Series0067-00492025-01-0127624510.3847/1538-4365/ad96b8Evaluation of the Single-component Thermal Dust Emission Model in Cosmic Microwave Background ExperimentsHao Liu0https://orcid.org/0000-0003-4410-5827Jia-Rui Li1https://orcid.org/0000-0003-3172-3714Yi-Fu Cai2https://orcid.org/0000-0003-0706-8465School of Physics and Optoelectronics Engineering, Anhui University , 111 Jiulong Road, Hefei, Anhui, 230601, People's Republic of China ; jr981025@mail.ustc.edu.cnSchool of Physics and Optoelectronics Engineering, Anhui University , 111 Jiulong Road, Hefei, Anhui, 230601, People's Republic of China ; jr981025@mail.ustc.edu.cn; Department of Astronomy, School of Physical Sciences, University of Science and Technology of China , No.96, JinZhai Road, Baohe District, Hefei, Anhui 230026, People's Republic of China ; yifucai@ustc.edu.cn; CAS Key Laboratory for Researches in Galaxies and Cosmology, School of Astronomy and Space Science, University of Science and Technology of China , Hefei, Anhui, 230026, People's Republic of ChinaDepartment of Astronomy, School of Physical Sciences, University of Science and Technology of China , No.96, JinZhai Road, Baohe District, Hefei, Anhui 230026, People's Republic of China ; yifucai@ustc.edu.cn; CAS Key Laboratory for Researches in Galaxies and Cosmology, School of Astronomy and Space Science, University of Science and Technology of China , Hefei, Anhui, 230026, People's Republic of ChinaIt is well known that multiple Galactic thermal dust emission components may exist along the line of sight, but a single-component approximation is still widely used, since a full multicomponent estimation requires a large number of frequency bands that are only available with future experiments. In light of this, we present a reliable, quantitative, and sensitive criterion to test the goodness of all kinds of dust emission estimations. This can not only give a definite answer to the quality of current single-component approximations but also help determine preconditions of future multicomponent estimations. Upon the former, previous works usually depend on a more complicated model to improve the single-component dust emission; however, our method is free from any additional model, and is sensitive enough to directly discover a substantial discrepancy between the Planck High Frequency Instrument data (100–857 GHz) and associated single-component dust emission estimations. This is the first time that the single-component estimation is ruled out by the data itself. For the latter, a similar procedure will be able to answer two important questions for estimating the complicated Galactic emissions: the number of necessary foreground components and their types.https://doi.org/10.3847/1538-4365/ad96b8Cosmic microwave background radiationInterstellar dustInterstellar mediumCosmic inflationAstronomy data modeling |
| spellingShingle | Hao Liu Jia-Rui Li Yi-Fu Cai Evaluation of the Single-component Thermal Dust Emission Model in Cosmic Microwave Background Experiments The Astrophysical Journal Supplement Series Cosmic microwave background radiation Interstellar dust Interstellar medium Cosmic inflation Astronomy data modeling |
| title | Evaluation of the Single-component Thermal Dust Emission Model in Cosmic Microwave Background Experiments |
| title_full | Evaluation of the Single-component Thermal Dust Emission Model in Cosmic Microwave Background Experiments |
| title_fullStr | Evaluation of the Single-component Thermal Dust Emission Model in Cosmic Microwave Background Experiments |
| title_full_unstemmed | Evaluation of the Single-component Thermal Dust Emission Model in Cosmic Microwave Background Experiments |
| title_short | Evaluation of the Single-component Thermal Dust Emission Model in Cosmic Microwave Background Experiments |
| title_sort | evaluation of the single component thermal dust emission model in cosmic microwave background experiments |
| topic | Cosmic microwave background radiation Interstellar dust Interstellar medium Cosmic inflation Astronomy data modeling |
| url | https://doi.org/10.3847/1538-4365/ad96b8 |
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