唧筒座AG

**HR 4049**
观测资料; 历元 J2000.0
星座	唧筒座
星官
赤经	10h 18m 07.59s
赤纬	–28° 59′ 31.2″
视星等（V）	5.53
特性
光谱分类	B9.5Ib-II
B−V 色指数	0.23
变星类型	原行星云（Post-AGB Star）
天体测定
径向速度 (Rv)	-33 km/s
自行 (μ)	赤经：–15.86 ± 0.32 mas/yr ; 赤纬：10.85 ± 0.38 mas/yr
视差 (π)	1.23 ± 0.36 mas
距离	approx. 2,700 ly ; (approx. 800 pc)
绝对星等 (MV)	-3.68
详细资料
质量	1.2 M☉
半径	15.1 R☉
亮度	3823 L☉
温度	11500 K
其他命名
	AG Antliae, CD-28° 8070, 2MASS J10180758-2859308, GSC 06630-01759, HD 89353, FK5 1265, PPM 257470, HIP 50456, SAO 178644, HR 4049.
参考数据库
SIMBAD	资料

唧筒座AG ，也称为HD 89353和 HR 4049，是颗位于唧筒座的前渐近巨星分支恒星。一颗非常贫金属星^[3]，它被富含几种分子的一层厚厚联星拱星盘环绕着^[4]，视星等5.53等，在理想的条件下随时都可以用裸眼看见这颗恒星^[5]。这颗恒星的距离大约是813秒差距（2,650光年）^[5]，已经被证实是联星 ^[6]；然而，像许多单独的特殊恒星一样，这颗恒星有着独特的频谱。这颗恒星基于其巴耳末系的谱线，是颗蓝超巨星，实际上它是颗位于前渐近巨星分支阶段的老年低质量恒星^[7]。这颗恒星正在进行激烈的质量损失^[8]，唯一改变的是在5.29和5.83星等间，以429天的周期改变光度^[9]。

参考资料

^ ^1.0 ^1.1 ^1.2 ^1.3 ^1.4 van Leeuwen, F. Validation of the new Hipparcos reduction. Astronomy and Astrophysics. 2007, 474 (2): 653–664 [2015-06-11]. Bibcode:2007A&A...474..653V. arXiv:0708.1752 . doi:10.1051/0004-6361:20078357. （原始内容存档于2019-03-28）. Vizier catalog entry （页面存档备份，存于互联网档案馆）
^ Bakker; et al. Spectral variability of the binary HR 4049. Astronomy and Astrophysics. 1998, 336 (1): 263–275. Bibcode:1998A&A...336..263B. arXiv:astro-ph/9802120 .
^ Yoichi Takeda, Mudumba Parthasarathy, Wako Aoki, Yoshifusa Ita, Yoshikazu Nakada, Hideyuki Izumiura, Kunio Noguchi, Masahide Takada-Hidai, Bun’ei Sato, Akito Tajitsu, Satoshi Honda, Satoshi Kawanomoto, Hiroyasu Ando, Hiroshi Karoji. Detection of Zinc in the Very Metal-Poor Post-AGB Star HR 4049. Publications of the Astronomical Society of Japan. 2002-10-25, 54 (5): 765–773 [2018-04-02]. ISSN 0004-6264. doi:10.1093/pasj/54.5.765. （原始内容存档于2019-08-12）（英语）.
^ S. E. Malek, J. Cami. The Gas-rich Circumbinary Disk of HR 4049. I. A Detailed Study of the Mid-infrared Spectrum. The Astrophysical Journal. 2014, 780 (1): 41 [2018-04-02]. ISSN 0004-637X. doi:10.1088/0004-637x/780/1/41 （英语）.
^ ^5.0 ^5.1 AG Antliae. SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. [15 June 2014]. （原始内容存档于2019-08-10）.
^ B. Acke, P. Degroote, R. Lombaert, B. L. de Vries, K. Smolders, T. Verhoelst, E. Lagadec, C. Gielen, H. Van Winckel, C. Waelkens. Amorphous carbon in the disk around the post-AGB binary HR 4049. Astronomy & Astrophysics. 2013-03-01, 551 [2018-04-02]. ISSN 0004-6361. doi:10.1051/0004-6361/201219282 （英语）.
^ Waelkens, C.; Lamers, H.; Waters, R. HR 4049 - an old low-mass star disguised as a young massive supergiant. ESO Messenger. September 1987, 49: 29–32. Bibcode:1987Msngr..49...29W.
^ T. R. Geballe, K. S. Noll, D. C. B. Whittet, L. B. F. M. Waters. Unusual features of the 1-4 micron spectrum of HR 4049. The Astrophysical Journal. May 1989, 340: L29–L32 [2018-04-02]. ISSN 0004-637X. doi:10.1086/185431. （原始内容存档于2017-11-20）（英语）.
^ VSX. AG Antliae. The International Variable Star Index. American Association of Variable Star Observers. 4 January 2010 [15 June 2013]. （原始内容存档于2021-01-05）.

外部链接

[van_Leeuwen2007-1] 1.0 ^1.1 ^1.2 ^1.3 ^1.4 van Leeuwen, F. Validation of the new Hipparcos reduction. Astronomy and Astrophysics. 2007, 474 (2): 653–664 [2015-06-11]. Bibcode:2007A&A...474..653V. arXiv:0708.1752 . doi:10.1051/0004-6361:20078357. （原始内容存档于2019-03-28）. Vizier catalog entry （页面存档备份，存于互联网档案馆）

[2] Bakker; et al. Spectral variability of the binary HR 4049. Astronomy and Astrophysics. 1998, 336 (1): 263–275. Bibcode:1998A&A...336..263B. arXiv:astro-ph/9802120 .

[Takeda-3] Yoichi Takeda, Mudumba Parthasarathy, Wako Aoki, Yoshifusa Ita, Yoshikazu Nakada, Hideyuki Izumiura, Kunio Noguchi, Masahide Takada-Hidai, Bun’ei Sato, Akito Tajitsu, Satoshi Honda, Satoshi Kawanomoto, Hiroyasu Ando, Hiroshi Karoji. Detection of Zinc in the Very Metal-Poor Post-AGB Star HR 4049. Publications of the Astronomical Society of Japan. 2002-10-25, 54 (5): 765–773 [2018-04-02]. ISSN 0004-6264. doi:10.1093/pasj/54.5.765. （原始内容存档于2019-08-12）（英语）.

[Malek-4] S. E. Malek, J. Cami. The Gas-rich Circumbinary Disk of HR 4049. I. A Detailed Study of the Mid-infrared Spectrum. The Astrophysical Journal. 2014, 780 (1): 41 [2018-04-02]. ISSN 0004-637X. doi:10.1088/0004-637x/780/1/41 （英语）.

[SIMBAD-5] 5.0 ^5.1 AG Antliae. SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. [15 June 2014]. （原始内容存档于2019-08-10）.

[Astron-6] B. Acke, P. Degroote, R. Lombaert, B. L. de Vries, K. Smolders, T. Verhoelst, E. Lagadec, C. Gielen, H. Van Winckel, C. Waelkens. Amorphous carbon in the disk around the post-AGB binary HR 4049. Astronomy & Astrophysics. 2013-03-01, 551 [2018-04-02]. ISSN 0004-6361. doi:10.1051/0004-6361/201219282 （英语）.

[Waelkens-7] Waelkens, C.; Lamers, H.; Waters, R. HR 4049 - an old low-mass star disguised as a young massive supergiant. ESO Messenger. September 1987, 49: 29–32. Bibcode:1987Msngr..49...29W.

[Geballe-8] T. R. Geballe, K. S. Noll, D. C. B. Whittet, L. B. F. M. Waters. Unusual features of the 1-4 micron spectrum of HR 4049. The Astrophysical Journal. May 1989, 340: L29–L32 [2018-04-02]. ISSN 0004-637X. doi:10.1086/185431. （原始内容存档于2017-11-20）（英语）.

[AAVSO-9] VSX. AG Antliae. The International Variable Star Index. American Association of Variable Star Observers. 4 January 2010 [15 June 2013]. （原始内容存档于2021-01-05）.

[1]

[2]

[3]

[4]

[5]

[6]

[7]

[8]

[9]