泣一
  | |
| 觀測資料 曆元 J2000 | |
|---|---|
| 星座 | 寶瓶座[1] |
| 星官 | 泣（虛宿） |
| 赤經 | 22h 20m 11.917s[2] |
| 赤緯 | -07° 49′ 15.97″[2] |
| 視星等（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 | |
| 徑向速度 (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] |
| 軌道[6] | |
| 繞行週期 (P) | 220.41±0.10 d |
| 偏心率 (e) | 0 (assumed) |
| 近心点 曆元 (T) | 2418548.7±7.4 JD |
| 半振幅 (K1) (primary) | 18.66+2.75 − km/s |
| 詳細資料 | |
| A | |
| 質量 | 4.63+0.25 −[7] M☉ |
| 半徑 | 5.5[8] R☉ |
| 表面重力 (log g) | 3.5[8] |
| 亮度 | 1,023+357 −264[7] L☉ |
| 溫度 | 12,454+152 −[7] K |
| 金属量 [Fe/H] | 0.059[8] dex |
| 自轉 | 6.5633±0.0063 d[7] |
| 自轉速度 (v sin i) | 65.0+6.9 −[7] km/s |
| 其他命名 | |
| 參考資料庫 | |
| SIMBAD | 资料 |
泣一（寶瓶座ρ，英語：Rho Aquarii）是位於天球赤道星座寶瓶座的一對聯星[10]系統。其名稱「寶瓶座ρ」為拜耳命名法所賦予，拉丁化的縮寫為「Rho Aqr」或「 ρ Aqr」。 此系統的綜合視星等為+5.34[3]，是肉眼可見的光點。根據視差的測量，這顆恆星大約位於距離太陽 750光年（230秒差距）之處[2]。它以–9公里/秒的徑向速度向著太陽的方向漂移[5]。它的位置靠近黃道，因此有時會被月球遮蔽[11]。
這是一個單線光譜聯星，由都卜勒頻移在光譜中揭示伴星的存在[10]。對資料的初始軌道解為週期為220.4天的圓形軌道[6]。
主星是一顆非磁性的化學特異]恆星，其恆星分類為 B8 IIIp Mn:Hg:[4]。它是候選的汞錳星，光譜中顯示這些元素在過剩[10]。至少偵測到兩個脈動週期：第一個特徵是盾牌座δ型變星，第二個則是劍魚座γ型變星，暗示這是一個混合脈衝變星[7]。 主導脈搏週期為1.1203±0.0002 d[12]。 這顆恆星質量是太陽的4.63倍，在有效溫度12,454K時，從其外層大氣輻射出的光度是太陽的1,023倍[7]。這種熱度使其呈現B型恆星的藍白色調[13]。 它的 自轉週期為6.5633±0.0063 d[7]。 主星不顯示光度學變異性，但伴星可能是變星[14]。雖然尚未公布這顆恆星的具體年齡估計，但它很可能不到五千萬年[15]。
參考文獻
- ^ 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
, 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 . doi:10.1051/0004-6361/202243940 .
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 .
- ^ 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 , doi:10.1093/mnras/sts318 .
- ^ 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 , doi:10.3847/0067-0049/224/1/2 .
- ^ * rho Aqr. SIMBAD. 斯特拉斯堡天文資料中心.
- ^ 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 , 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 , 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 .
- ^ 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 , doi:10.3847/1538-4357/ac0251 .
外部連結
- HR 8512 互联网档案馆的存檔，存档日期2005-09-25.
- Image Rho Aquarii （英語）
- Aladin sky atlas, image （英語）