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  1. B100 理学部/理学研究科
  2. B100a 雑誌掲載論文
  3. 学術雑誌

Faint warm debris disks around nearby bright stars explored by AKARI and IRSF

http://hdl.handle.net/2237/27302
4fc0e72e-b826-46ca-aeff-e78922d111a9
名前 / ファイル ライセンス アクション
aa26215-15.pdf aa26215-15.pdf (7.8 MB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2018-01-29
タイトル
タイトル Faint warm debris disks around nearby bright stars explored by AKARI and IRSF
著者 Ishihara, Daisuke

× Ishihara, Daisuke

WEKO 74793

Ishihara, Daisuke

Search repository
Takeuchi, Nami

× Takeuchi, Nami

WEKO 74794

Takeuchi, Nami

Search repository
Kobayashi, Hiroshi

× Kobayashi, Hiroshi

WEKO 74795

Kobayashi, Hiroshi

Search repository
Nagayama, Takahiro

× Nagayama, Takahiro

WEKO 74796

Nagayama, Takahiro

Search repository
Kaneda, Hidehiro

× Kaneda, Hidehiro

WEKO 74797

Kaneda, Hidehiro

Search repository
Inutsuka, Shu-ichiro

× Inutsuka, Shu-ichiro

WEKO 74798

Inutsuka, Shu-ichiro

Search repository
Fujiwara, Hideaki

× Fujiwara, Hideaki

WEKO 74799

Fujiwara, Hideaki

Search repository
Onaka, Takashi

× Onaka, Takashi

WEKO 74800

Onaka, Takashi

Search repository
キーワード
主題Scheme Other
主題 circumstellar matter
キーワード
主題Scheme Other
主題 zodiacal dust
キーワード
主題Scheme Other
主題 infrared: stars
抄録
内容記述 Context. Debris disks are important observational clues for understanding planetary-system formation process. In particular, faint
warm debris disks may be related to late planet formation near 1 au. A systematic search of faint warm debris disks is necessary to
reveal terrestrial planet formation.
Aims. Faint warm debris disks show excess emission that peaks at mid-IR wavelengths. Thus we explore debris disks using the
AKARI mid-IR all-sky point source catalog (PSC), a product of the second generation unbiased IR all-sky survey.
Methods. We investigate IR excess emission for 678 isolated main-sequence stars for which there are 18 m detections in the AKARI
mid-IR all-sky catalog by comparing their fluxes with the predicted fluxes of the photospheres based on optical to near-IR fluxes and
model spectra. The near-IR fluxes are first taken from the 2MASS PSC. However, 286 stars with Ks < 4:5 in our sample have large
flux errors in the 2MASS photometry due to saturation. Thus we have measured accurate J, H, and Ks band fluxes, applying neutral
density (ND) filters for Simultaneous InfraRed Imager for Unbiased Survey (SIRIUS) on IRSF, the 1.4m near-IR telescope in South
Africa, and improved the flux accuracy from 14% to 1.8% on average.
Results. We identified 53 debris-disk candidates including eight new detections from our sample of 678 main-sequence stars. The
detection rate of debris disks for this work is 8%, which is comparable with those in previous works by Spitzer and Herschel.
Conclusions. The importance of this study is the detection of faint warm debris disks around nearby field stars. At least nine objects
have a large amount of dust for their ages, which cannot be explained by the conventional steady-state collisional cascade model.
内容記述タイプ Abstract
出版者
出版者 EDP Sciences
言語
言語 eng
資源タイプ
資源タイプresource http://purl.org/coar/resource_type/c_6501
タイプ journal article
ISSN
収録物識別子タイプ ISSN
収録物識別子 0004-6361
書誌情報 ASTRONOMY & ASTROPHYSICS

巻 601, p. A72-A72, 発行日 2017-05
著者版フラグ
値 publisher
URI
識別子 http://doi.org/10.1051/0004-6361/201526215
識別子タイプ DOI
URI
識別子 http://hdl.handle.net/2237/27302
識別子タイプ HDL
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