利用VERA对AGB变星进行VLBI天体测量——半规则变星S Crateris

Akiharu Nakagawa; Miyuki Tsushima; Kazuma Ando; Takeshi Bushimata; Yoon Kyung Choi; Tomoya Hirota; Mareki Honma; Hiroshi Imai; Kenzaburo Iwadate; Takaaki Jike; Seiji Kameno; Osamu Kameya; Ryuichi Kamohara; Yukitoshi Kan-Ya; Noriyuki Kawaguchi; Masachika Kijima; Mi Kyoung Kim; Hideyuki Kobayashi; Seisuke Kuji; Tomoharu Kurayama; Toshihisa Maeda; Seiji Manabe; Kenta Maruyama; Makoto Matsui; Naoko Matsumoto; Takeshi Miyaji; Takumi Nagayama; Kayoko Nakamura; Daisuke Nyu; Chung Sik Oh; Toshihiro Omodaka; Tomoaki Oyama; Nicolas Pradel; Satoshi Sakai; Tetsuo Sasao; Katsuhisa Sato; Mayumi Sato; Katsunori M. Shibata; Hiroshi Suda; Yoshiaki Tamura; Kousuke Ueda; Yuji Ueno; Kazuyoshi Yamashita

doi:10.1093/pasj/60.5.1013

利用VERA对AGB变星进行VLBI天体测量——半规则变星S Crateris

天体物理学 2015-05-13 v1

作者: Akiharu Nakagawa , Miyuki Tsushima , Kazuma Ando , Takeshi Bushimata , Yoon Kyung Choi , Tomoya Hirota , Mareki Honma , Hiroshi Imai , Kenzaburo Iwadate , Takaaki Jike , Seiji Kameno , Osamu Kameya , Ryuichi Kamohara , Yukitoshi Kan-Ya , Noriyuki Kawaguchi , Masachika Kijima , Mi Kyoung Kim , Hideyuki Kobayashi , Seisuke Kuji , Tomoharu Kurayama , Toshihisa Maeda , Seiji Manabe , Kenta Maruyama , Makoto Matsui , Naoko Matsumoto , Takeshi Miyaji , Takumi Nagayama , Kayoko Nakamura , Daisuke Nyu , Chung Sik Oh , Toshihiro Omodaka , Tomoaki Oyama , Nicolas Pradel , Satoshi Sakai , Tetsuo Sasao , Katsuhisa Sato , Mayumi Sato , Katsunori M. Shibata , Hiroshi Suda , Yoshiaki Tamura , Kousuke Ueda , Yuji Ueno , Kazuyoshi Yamashita

在 arXiv 上查看 ↗ PDF ↗ DOI ↗

摘要

我们基于半规则变星S Crateris (S Crt)的年视差，给出了其距离测量结果。利用VERA望远镜独特的双波束系统，我们测量了与S Crt相关的水脉泽斑点的绝对自行，参考了角距为1.23°的类星体J1147-0724。在近两年的观测中，我们在LSR速度为34.7 km s $^{-1}$ 处探测到了该脉泽斑点，并测量出其年视差为2.33±0.13 mas，对应距离为430 $^{+25}_{-23}$ pc。该测量精度比HIPPARCOS的视差测量高一个数量级。脉泽斑点的角分布和三维速度场表明存在一个沿东北-西南方向流动轴的双极外流。利用距离和光球温度，我们估算了S Crt的恒星半径，并将其与米拉变星的半径进行了比较。

关键词

VLBI天体测量 AGB变星半规则变星水脉泽年视差距离测量双极外流

引用

@article{arxiv.0808.1151,
  title  = {VLBI Astrometry of AGB Variables with VERA -- A Semiregular Variable S Crateris --},
  author = {Akiharu Nakagawa and Miyuki Tsushima and Kazuma Ando and Takeshi Bushimata and Yoon Kyung Choi and Tomoya Hirota and Mareki Honma and Hiroshi Imai and Kenzaburo Iwadate and Takaaki Jike and Seiji Kameno and Osamu Kameya and Ryuichi Kamohara and Yukitoshi Kan-Ya and Noriyuki Kawaguchi and Masachika Kijima and Mi Kyoung Kim and Hideyuki Kobayashi and Seisuke Kuji and Tomoharu Kurayama and Toshihisa Maeda and Seiji Manabe and Kenta Maruyama and Makoto Matsui and Naoko Matsumoto and Takeshi Miyaji and Takumi Nagayama and Kayoko Nakamura and Daisuke Nyu and Chung Sik Oh and Toshihiro Omodaka and Tomoaki Oyama and Nicolas Pradel and Satoshi Sakai and Tetsuo Sasao and Katsuhisa Sato and Mayumi Sato and Katsunori M. Shibata and Hiroshi Suda and Yoshiaki Tamura and Kousuke Ueda and Yuji Ueno and Kazuyoshi Yamashita},
  journal= {arXiv preprint arXiv:0808.1151},
  year   = {2015}
}

备注

9 pages, 4 figures, accepted for publication in PASJ (Vol.60, No.5, October 25, VERA special issue)

利用VERA对AGB变星进行VLBI天体测量——半规则变星S Crateris

摘要

关键词

引用

备注

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