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Annual Parallax of the K-Type Star System IRAS 22480+6002 Measured with VERA
http://hdl.handle.net/10232/26241
http://hdl.handle.net/10232/26241f66d4010-d5c0-4f5f-a2ab-586ff9c84812
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
Annual Parallax of the K-Type Star System IRAS 22480+6002 Measured with VERA.pdf (326.6 kB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
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| 公開日 | 2016-03-15 | |||||
| タイトル | ||||||
| タイトル | Annual Parallax of the K-Type Star System IRAS 22480+6002 Measured with VERA | |||||
| タイトル言語 | en | |||||
| 著者 |
今井, 裕
× 今井, 裕× 坂井, 伸行× 中西, 裕之× 坂之上, 裕史× 本間, 希樹× 宮地, 竹史 |
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| 言語 | ||||||
| 言語 | jpn | |||||
| キーワード | ||||||
| 主題言語 | en | |||||
| 主題Scheme | Other | |||||
| 主題 | masers -- stars | |||||
| キーワード | ||||||
| 主題言語 | en | |||||
| 主題Scheme | Other | |||||
| 主題 | AGB and post-AGB -- stars | |||||
| キーワード | ||||||
| 主題言語 | en | |||||
| 主題Scheme | Other | |||||
| 主題 | individual (IRAS 22480+6002) -- stars | |||||
| キーワード | ||||||
| 主題言語 | en | |||||
| 主題Scheme | Other | |||||
| 主題 | mass-loss | |||||
| 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 | |||||
| 要約 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | We present astrometric VLBI observations of H2O masers associated with IRAS 22480+6002 (= IRC+60370, hereafter I22480) with the VLBI Exploration of Radio Astrometry (VERA). The stellar type of I22480 looks unusual in stellar maser sources, and has been debated since the 1970's. We successfully determined that an annual parallax of a group of H2O maser spots is π = 0.400 ± 0.025 mas, corresponding to a distance to I22480 of D = 2.50[+0:17 -0:15] kpc. This suggests that an estimated bolometric luminosity of I22480 should be revised to 35000L, preferring a K-type supergiant to an RV Tau-type variable star, previously suggested. Although its spectral type is unusual in stellar maser sources, internal motions of H2O maser features suggest that the H2O masers are associated with the circumstellar envelope of this star. We derived a secular proper motion of I22480, (μ_α, μ_δ) = (-2.58 ± 0.33, -1.91 ± 0.17) [mas yr^-1], from a possible stellar motion relative to the maser feature motion. The derived motion of I22480 in the Milky Way has a deviation of ~ -30 km s^-1 in the Galactic azimuthal direction from the circular motion, estimated from a galactocentric distance to I22480 and an assumption of a flat Galactic rotation curve. This peculiar motion is still comparable to those typically seen in H2O maser sources located in the Perseus Arm. Taking into account its peculiar motion and proximity to the Galactic midplane (z ≃ 60 pc), I22480 may be a member of the Galactic thin disk. | |||||
| 内容記述言語 | en | |||||
| 収録雑誌名 |
en : Publications of the Astronomical Society of Japan 巻 64, 号 6, p. 142, 発行日 2012 |
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| 作成日 | ||||||
| 日付 | 2012-12-25 | |||||
| 日付タイプ | Issued | |||||
| ISSN | ||||||
| 収録物識別子タイプ | PISSN | |||||
| ISSN | 00046264 | |||||
| NII書誌ID（雑誌） | ||||||
| 収録物識別子タイプ | NCID | |||||
| NC ID | AA1082896X | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| DOI | https://doi.org/10.1093/pasj/64.6.142 | |||||
| 権利 | ||||||
| 権利情報の言語 | ja | |||||
| 権利情報 | 日本天文学会 | |||||
| 出版タイプ | ||||||
| 出版タイプ | VoR | |||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
| NDC | ||||||
| 主題Scheme | NDC | |||||
| 主題 | 440 | |||||
| 公開者・出版者 | ||||||
| 出版者 | Astronomical Society of Japan | |||||
| 出版者言語 | en | |||||
