| Item type |
デフォルトアイテムタイプ_（フル）(1) |
| 公開日 |
2023-03-18 |
| タイトル |
|
|
タイトル |
Study of the Cosmic Rays and Interstellar Medium in Local HI Clouds Using Fermi-LAT Gamma-Ray Observations |
|
言語 |
en |
| 作成者 |
Mizuno, T.
Abdollahi, S.
Fukui, Y.
Hayashi, K.
Koyama, T.
Okumura, A.
Tajima, H.
Yamamoto, H.
|
| アクセス権 |
|
|
アクセス権 |
open access |
|
アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
| 権利情報 |
|
|
権利情報 |
This is not the published version. Please cite only the published version. この論文は出版社版ではありません。引用の際には出版社版をご確認、ご利用ください。 |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
Galactic cosmic rays |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
Gamma-rays |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
Interstellar medium |
| 内容記述 |
|
|
内容記述 |
An accurate estimate of the interstellar gas density distribution is crucial to understanding the interstellar medium (ISM) and Galactic cosmic rays (CRs). To comprehend the ISM and CRs in a local environment, a study of the diffuse γ-ray emission in a midlatitude region of the third quadrant was performed. The γ-ray data in the 0.1–25.6 GeV energy range of the Fermi Large Area Telescope (LAT) and other interstellar gas tracers such as the HI4PI survey data and the Planck dust thermal emission model were used, and the northern and southern regions were analyzed separately. The variation of the dust emission Dem with the total neutral gas column density NH was studied in high dust temperature areas, and the NH/Dem ratio was calibrated using γ-ray data under the assumption of a uniform CR intensity in the studied regions. The measured integrated γ-ray emissivities above 100 MeV are (1.58 ± 0.04) × 10-26 photons s-1 sr-1H‐atom-1 and (1.59 ± 0.02) × 10-26 photons s-1 sr-1H‐atom-1 in the northern and southern regions, respectively, supporting the existence of a uniform CR intensity in the vicinity of the solar system. While most of the gas can be interpreted to be H I with a spin temperature of TS = 125 K or higher, an area dominated by optically thick H I with TS ~ 40 K was identified. |
|
言語 |
en |
| 内容記述 |
|
|
内容記述タイプ |
Other |
|
内容記述 |
This work was partially supported by JSPS Grants-in-Aid for Scientific Research (KAKENHI) grant Nos.JP17H02866 (T.M.) and JP26800160 (K.H.) and by Core of Research for the Energetic Universe at Hiroshima University. |
| 出版者 |
|
|
出版者 |
The American Astronomical Society |
| 出版者 |
|
|
出版者 |
IOP Publishing |
| 言語 |
|
|
言語 |
eng |
| 資源タイプ |
|
|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
|
資源タイプ |
journal article |
| 出版タイプ |
|
|
出版タイプ |
AO |
|
出版タイプResource |
http://purl.org/coar/version/c_b1a7d7d4d402bcce |
| 関連情報 |
|
|
|
識別子タイプ |
DOI |
|
|
関連識別子 |
10.3847/1538-4357/ab6a99 |
| 関連情報 |
|
|
|
識別子タイプ |
DOI |
|
|
関連識別子 |
https://doi.org/10.3847/1538-4357/ab6a99 |
| 収録物識別子 |
|
|
収録物識別子タイプ |
ISSN |
|
収録物識別子 |
0004-637X |
| 収録物識別子 |
|
|
収録物識別子タイプ |
ISSN |
|
収録物識別子 |
1538-4357 |
| 開始ページ |
|
|
開始ページ |
120 |
| 書誌情報 |
The Astrophysical Journal
The Astrophysical Journal
巻 890,
号 2,
p. 120,
発行日 2020-02-20
|
| 旧ID |
50465 |
AstrophysicalJou_890_120.pdf (12.9 MB)
