泣一
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泣一(宝瓶座ρ)在宝瓶座中的位置(红圈) | |
| 观测资料 历元 J2000 | |
|---|---|
| 星座 | 宝瓶座[1] |
| 星官 | 泣(虚宿) |
| 赤经 | 22h 20m 11.917s[2] |
| 赤纬 | -07° 49′ 15.97″[2] |
| 视星等(V) | +5.34[3] |
| 特性 | |
| 光谱分类 | B8 IIIp Mn:Hg:[4] |
| U−B 色指数 | −0.358[3] |
| B−V 色指数 | −0.057[3] |
| 天体测定 | |
| 径向速度 (Rv) | −9[5] km/s |
| 自行 (μ) | 赤经:+14.803 mas/yr 赤纬:+0.472 mas/yr |
| 视差 (π) | 4.3443 ± 0.1468[2] mas |
| 距离 | 750 ± 30 ly (230 ± 8 pc) |
| 绝对星等 (MV) | −1.78[1] |
| 轨道[6] | |
| 绕行周期 (P) | 220.41±0.10 d |
| 偏心率 (e) | 0 (assumed) |
| 近心点 历元 (T) | 2418548.7±7.4 JD |
| 半振幅 (K1) (primary) | 18.66+2.75 − km/s |
| 详细资料 | |
| A | |
| 质量 | 4.63+0.25 −[7] M☉ |
| 半径 | 5.5[8] R☉ |
| 表面重力 (log g) | 3.5[8] |
| 亮度 | 1,023+357 −264[7] L☉ |
| 温度 | 12,454+152 −[7] K |
| 金属量 [Fe/H] | 0.059[8] dex |
| 自转 | 6.5633±0.0063 d[7] |
| 自转速度 (v sin i) | 65.0+6.9 −[7] km/s |
| 其他命名 | |
| 参考数据库 | |
| SIMBAD | 资料 |
泣一(宝瓶座ρ,英语:Rho Aquarii)是位于天球赤道星座宝瓶座的一对联星[10]系统。其名称“宝瓶座ρ”为拜耳命名法所赋予,拉丁化的缩写为“Rho Aqr”或“ ρ Aqr”。 此系统的综合视星等为+5.34[3],是肉眼可见的光点。根据视差的测量,这颗恒星大约位于距离太阳 750光年(230秒差距)之处[2]。它以–9公里/秒的径向速度向着太阳的方向漂移[5]。它的位置靠近黄道,因此有时会被月球遮蔽[11]。
这是一个单线光谱联星,由多普勒频移在光谱中揭示伴星的存在[10]。对资料的初始轨道解为周期为220.4天的圆形轨道[6]。
主星是一颗非磁性的化学特异]恒星,其恒星分类为 B8 IIIp Mn:Hg:[4]。它是候选的汞锰星,光谱中显示这些元素在过剩[10]。至少侦测到两个脉动周期:第一个特征是盾牌座δ型变星,第二个则是剑鱼座γ型变星,暗示这是一个混合脉冲变星[7]。 主导脉搏周期为1.1203±0.0002 d[12]。 这颗恒星质量是太阳的4.63倍,在有效温度12,454K时,从其外层大气辐射出的光度是太阳的1,023倍[7]。这种热度使其呈现B型恒星的蓝白色调[13]。 它的 自转周期为6.5633±0.0063 d[7]。 主星不显示光度学变异性,但伴星可能是变星[14]。虽然尚未公布这颗恒星的具体年龄估计,但它很可能不到五千万年[15]。
参考文献[编辑]
- ^ 1.0 1.1 Anderson, E.; Francis, Ch., XHIP: An extended hipparcos compilation, Astronomy Letters, 2012, 38 (5): 331, Bibcode:2012AstL...38..331A, S2CID 119257644, arXiv:1108.4971 可免费查阅, doi:10.1134/S1063773712050015.
- ^ 2.0 2.1 2.2 2.3 Vallenari, A.; et al. Gaia Data Release 3. Summary of the content and survey properties. Astronomy and Astrophysics. 2023, 674: A1. Bibcode:2023A&A...674A...1G. S2CID 244398875. arXiv:2208.00211 可免费查阅. doi:10.1051/0004-6361/202243940 可免费查阅. Gaia DR3 record for this source at VizieR.
- ^ 3.0 3.1 3.2 3.3 Cousins, A. W. J., Standardization of Broadband Photometry of Equatorial Standards, South African Astronomical Observatory Circulars, 1984, 8: 59, Bibcode:1984SAAOC...8...59C.
- ^ 4.0 4.1 Abt, Helmut A.; Levato, Hugo; Grosso, Monica, Rotational Velocities of B Stars, The Astrophysical Journal, July 2002, 573 (1): 359–365, Bibcode:2002ApJ...573..359A, doi:10.1086/340590 可免费查阅.
- ^ 5.0 5.1 Wilson, Ralph Elmer, General Catalogue of Stellar Radial Velocities, Carnegie Institute Washington D.C. Publication (Washington: Carnegie Institution of Washington), 1953, Bibcode:1953GCRV..C......0W.
- ^ 6.0 6.1 Stickland, D. J.; Weatherby, J., Radial velocities of northern mercury stars, Astronomy and Astrophysics, Supplemental Series, July 1984, 57: 55–67, Bibcode:1984A&AS...57...55S.
- ^ 7.0 7.1 7.2 7.3 7.4 7.5 7.6 7.7 Paunzen, E.; et al, A photometric study of chemically peculiar stars with the STEREO satellites - II. Non-magnetic chemically peculiar stars, Monthly Notices of the Royal Astronomical Society, February 2013, 429 (1): 119–125, Bibcode:2013MNRAS.429..119P, arXiv:1211.1535 可免费查阅, doi:10.1093/mnras/sts318 可免费查阅.
- ^ 8.0 8.1 8.2 Huber, Daniel; Bryson, Stephen T.; Haas, Michael R.; Barclay, Thomas; Barentsen, Geert; Howell, Steve B.; Sharma, Sanjib; Stello, Dennis; Thompson, Susan E., The K2 Ecliptic Plane Input Catalog (EPIC) and Stellar Classifications of 138,600 Targets in Campaigns 1-8, The Astrophysical Journal Supplement Series, 2016, 224 (1): 2, Bibcode:2016ApJS..224....2H, arXiv:1512.02643 可免费查阅, doi:10.3847/0067-0049/224/1/2 可免费查阅.
- ^ * rho Aqr. SIMBAD. 斯特拉斯堡天文资料中心.
- ^ 10.0 10.1 10.2 Makaganiuk, V.; et al, The search for magnetic fields in mercury-manganese stars, Astronomy and Astrophysics, January 2011, 525: A97, Bibcode:2011A&A...525A..97M, S2CID 118860674, arXiv:1010.3931 可免费查阅, doi:10.1051/0004-6361/201015666.
- ^ Hilaire, G., Observations of occultations of stars by the moon, Astronomy and Astrophysics Supplement, March 1974, 13: 395, Bibcode:1974A&AS...13..395H. See the SAO 146023 entry on p. 402.
- ^ Bowman, D. M.; et al, K2 space photometry reveals rotational modulation and stellar pulsations in chemically peculiar A and B stars, Astronomy & Astrophysics, August 2018, 616, id. A77, Bibcode:2018A&A...616A..77B, arXiv:1805.01799 可免费查阅, doi:10.1051/0004-6361/201833037.
- ^ The Colour of Stars, Australia Telescope, Outreach and Education (Commonwealth Scientific and Industrial Research Organisation), December 21, 2004 [2012-01-16], (原始内容存档于2013-12-03)
- ^ Adelman, S. J.; Young, K. J., uvby FCAPT photometry of the mCP stars HR 2258, MW Vul, and HR 9017 and the HgMn star 46 ρ Aqr, Astronomy and Astrophysics, January 2005, 429: 317–322, Bibcode:2005A&A...429..317A, doi:10.1051/0004-6361:20041118 可免费查阅.
- ^ Kerr, Ronan M. P.; Rizzuto, Aaron C.; Kraus, Adam L.; Offner, Stella S. R., Stars with Photometrically Young Gaia Luminosities Around the Solar System (SPYGLASS). I. Mapping Young Stellar Structures and Their Star Formation Histories, The Astrophysical Journal, 2021, 917 (1): 23, Bibcode:2021ApJ...917...23K, arXiv:2105.09338 可免费查阅, doi:10.3847/1538-4357/ac0251 可免费查阅.
外部链接[编辑]
- HR 8512 互联网档案馆的存档,存档日期2005-09-25.
- Image Rho Aquarii (英语)
- Aladin sky atlas, image (英语)