金牛座RY
天球赤道座標：
04h 21m 57.4133s，+28° 26′ 35.5340″
| 觀測資料 曆元 J2000 | |
|---|---|
| 星座 | 金牛座 |
| 星官 | |
| 赤經 | 04h 21m 57.4133s[4] |
| 赤緯 | +28° 26′ 35.5340″[4] |
| 視星等（V） | 9.5 - 11.5[5] |
| 特性 | |
| 演化阶段 | 主序前星 |
| 光谱分类 | F7[6] |
| 视星等 (G) | 10.706[7] |
| 变星类型 | 金牛T[8] |
| 天体测定 | |
| 徑向速度 (Rv) | 24.3+1.9 − km/s |
| 自行 (μ) | 赤经：8.744[7] mas/yr 赤纬：−27.002[7] mas/yr |
| 视差 (π) | 7.2349 ± 0.2031[7] mas |
| 距离 | 450 ± 10 ly (138 ± 4 pc) |
| 绝对星等 (MV) | +2.11 (at magnitude 9.55)[5] |
| 位置（相對於金牛座RY） | |
| 组成恒星 | 2MASS J04215810+2826300 |
| 角距離 | 10.83″ |
| 位置角 | 122.41° |
| 观测到的相距 （估计） | 1500 AU |
| 詳細資料 | |
| 質量 | 2.0[9] M☉ |
| 半徑 | 3.2[9] R☉ |
| 表面重力 (log g) | 3.8[9] |
| 亮度 | 11.6[9] L☉ |
| 溫度 | 5,945[9] K |
| 年齡 | 4.7+1.00 −0.90[5] Myr |
| 其他命名 | |
| 參考資料庫 | |
| SIMBAD | 资料 |
金牛座RY是在金牛座的一顆年輕金牛T星，屬於金牛座分子雲，距離大約450 光年遠。它的質量比典型的金牛T星更大，可能是這個類別和赫比格Ae/Be星之間的中間體[10]
恆星系統[编辑]
在2008年發現金牛座RY疑似有一顆伴星：視星等14.81的2MASS J04215810+2826300，投影的距離約1,500 AU[11]reference = [11]。但來自蓋亞任務的數據，已經證明這是一顆與金牛座RY無關的背景星[12]。
原行星系統[编辑]
2006年發現這顆恆星被原行星盤包圍[10]。圓盤主要由氣體組成，質量為0.3M☉[13]。原行星盤的存在是有爭議的；該信號也可以歸因於出生的部分殼層被年輕恆星破壞。此外，還檢測到極地噴流[14]。射流含有可檢測量的氧和硫[6]。
自2021年以來，懷疑在距離0.2AU的軌道上，有一顆超級木星等級的行星[15]。
| 成員 (依恆星距離) |
质量 | 半長軸 (AU) |
轨道周期 (天) |
離心率 | 傾角 | 半径 |
|---|---|---|---|---|---|---|
| 原行星盤 | 0.21 — 80 AU | 65° | — | |||
變異性[编辑]
金牛座RY會改變亮度（高達1.5星等）[14]，是當恆星穿過原行星盤內部的不均勻性時，因遮蔽產生亮度波動的獵戶型變星 [13]。它還會產生不規則的增亮事件，持續時間約為一個月，振幅為一個星等[16]。 金牛座RY的光度曲線在十年內變化2-3個星等，在一年內變化大約一個星等。 這顆恆星可能改變了這一過程中的變異機制，因而在20世紀逐漸變亮[17]。
參考資料[编辑]
- ^ Ismailov, N. Z.; Adygezalzade, A. N. Light Curve Analysis for RY Tau. Astronomy Reports. February 2012, 56 (2): 131–137 [3 April 2022]. Bibcode:2012ARep...56..131I. S2CID 255203421. doi:10.1134/S1063772912020023.
- ^ Ismailov, N. Z.; Shustarev, P. N.; Adigezalzade, A. N.; Bahaddinova, G. R. Variability of the Spectrum and Brightness of RY Tau. Astronomy Letters. January 2011, 37 (11): 783–790 [3 April 2022]. Bibcode:2011AstL...37..783I. S2CID 119973584. doi:10.1134/S1063773711100033.[永久失效連結]
- ^ Siwak, Michal; Rucinski, Slavek M.; Matthews, Jaymie M.; Kuschnig, Rainer; Guenther, David B.; Moffat, Anthony F. J.; Sasselov, Dimitar; Weiss, Werner W. Analysis of MOST light curves of five young stars in Taurus–Auriga and Lupus 3 star-forming regions. Monthly Notices of the Royal Astronomical Society. August 2011, 415 (2): 1119–1124. Bibcode:2011MNRAS.415.1119S. arXiv:1101.5806
. doi:10.1111/j.1365-2966.2011.18683.x .
- ^ 4.0 4.1 V* RY Tau. SIMBAD. 斯特拉斯堡天文資料中心.
- ^ 5.0 5.1 5.2 Gorda, S Yu; Mkrtichian, D. E.; Fernandez, M.; Irsmambetova, T. R.; Shenavrin, V. I.; Gahm, G. F.; Djupvik, A. A.; De Albuquerque, R M G.; Babina, E. V.; Artemenko, S. A.; Gameiro, J. F.; Grankin, K. N.; Petrov, P. P., Dynamics of wind and the dusty environments in the accreting T Tauri stars RY Tauri and SU Aurigae, Monthly Notices of the Royal Astronomical Society, 2019, 483: 132–146, arXiv:1811.08635 , doi:10.1093/mnras/sty3066
- ^ 6.0 6.1 Giannini, T.; Nisini, B.; Antoniucci, S.; Biazzo, K.; Alcalá, J.; Bacciotti, F.; Fedele, D.; Frasca, A.; Harutyunyan, A.; Munari, U.; Rigliaco, E.; Vitali, F., GIARPS High-resolution Observations of T Tauri stars (GHOsT). I: Jet line emission, Astronomy & Astrophysics, 2019, A44: 631, Bibcode:2019A&A...631A..44G, S2CID 202719615, arXiv:1909.10392 , doi:10.1051/0004-6361/201936085
- ^ 7.0 7.1 7.2 7.3 Brown, A. G. A.; et al. Gaia Early Data Release 3: Summary of the contents and survey properties. Astronomy & Astrophysics. 2021, 649: A1. Bibcode:2021A&A...649A...1G. S2CID 227254300. arXiv:2012.01533 . doi:10.1051/0004-6361/202039657 . 已忽略未知参数
|collaboration=(帮助) (勘误: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR. - ^ Samus, N. N.; Durlevich, O. V.; et al. VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013). VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 2009, 1: B/gcvs. Bibcode:2009yCat....102025S.
- ^ 9.0 9.1 9.2 9.3 9.4 Davies, Claire L.; Kraus, Stefan; Harries, Tim J.; Monnier, John D.; Kloppenborg, Brian; Aarnio, Alicia; Baron, Fabien; Lopez, Rebeca Garcia; Millan-Gabet, Rafael; Parks, Robert; Pedretti, Ettore; Perraut, Karine; Sturmann, Judit; Sturmann, Laszlo; Ten Brummelaar, Theo A.; Touhami, Yamina, The Inner Disk of RY Tau: Evidence of Stellar Occultation by the Disk Atmosphere at the Sublimation Rim from K-band Continuum Interferometry, The Astrophysical Journal, 2020, 897 (1): 31, Bibcode:2020ApJ...897...31D, S2CID 218628839, arXiv:2005.06932 , doi:10.3847/1538-4357/ab93c1
- ^ 10.0 10.1 Monnier, J. D.; Berger, J.‐P.; Millan‐Gabet, R.; Traub, W. A.; Schloerb, F. P.; Pedretti, E.; Benisty, M.; Carleton, N. P.; Haguenauer, P.; Kern, P.; Labeye, P.; Lacasse, M. G.; Malbet, F.; Perraut, K.; Pearlman, M.; Zhao, M., Few Skewed Disks Found in First Closure-Phase Survey of Herbig Ae/Be stars, The Astrophysical Journal, 2006, 647 (1): 444–463, Bibcode:2006ApJ...647..444M, S2CID 7357373, arXiv:astro-ph/0606052 , doi:10.1086/505340
- ^ 11.0 11.1 Itoh, Yoichi; Tamura, Motohide; Hayashi, Masahiko; Oasa, Yumiko; Hayashi, Saeko S.; Fukagawa, Misato; Kudo, Tomoyuki; Mayama, Satoshi; Ishii, Miki; Pyo, Tae-Soo; Yamashita, Takuya; Morino, Junichi, Near-Infrared Spectroscopy of Faint Companions around Young Stellar Objects Associated with the Taurus Molecular Cloud, Publications of the Astronomical Society of Japan, 2008, 60 (2): 209–218, Bibcode:2008PASJ...60..209I, doi:10.1093/pasj/60.2.209
- ^ Brown, A. G. A.; et al. Gaia Early Data Release 3: Summary of the contents and survey properties. Astronomy & Astrophysics. 2021, 649: A1. Bibcode:2021A&A...649A...1G. S2CID 227254300. arXiv:2012.01533 . doi:10.1051/0004-6361/202039657 . 已忽略未知参数
|collaboration=(帮助) (勘误: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR. - ^ 13.0 13.1 13.2 Davies, Claire L.; Kraus, Stefan; Harries, Tim J.; Monnier, John D.; Kloppenborg, Brian; Aarnio, Alicia; Baron, Fabien; Lopez, Rebeca Garcia; Millan-Gabet, Rafael; Parks, Robert; Pedretti, Ettore; Perraut, Karine; Sturmann, Judit; Sturmann, Laszlo; Ten Brummelaar, Theo A.; Touhami, Yamina, The inner disk of RY Tau: evidence of stellar occultation by the disk atmosphere at the sublimation rim from K-band continuum interferometry, The Astrophysical Journal, 2020, 897 (1): 31, Bibcode:2020ApJ...897...31D, S2CID 218628839, arXiv:2005.06932 , doi:10.3847/1538-4357/ab93c1
- ^ 14.0 14.1 Garufi, A.; et al, The SPHERE view of the jet and the envelope of RY Tau, Astronomy & Astrophysics, 2019, 628: A68, Bibcode:2019A&A...628A..68G, S2CID 189927976, arXiv:1906.06910 , doi:10.1051/0004-6361/201935546
- ^ Petrov, P. P.; Romanova, M. M.; Grankin, K. N.; Artemenko, S. A.; Babina, E. V.; Gorda, S Yu, Modulated accretion in the T Tauri star RY Tau – a stable MHD propeller or a planet at 0.2 au?, Monthly Notices of the Royal Astronomical Society, 2021, 504: 871–877, arXiv:2104.00433 , doi:10.1093/mnras/stab904
- ^ Zajtseva, G.; Petrov, P.; Ilyin, I.; Duemler, R.; Tuominen, I., RY Tauri at High Brightness, Information Bulletin on Variable Stars, 1996, 4408: 1, Bibcode:1996IBVS.4408....1Z
- ^ Beck, Tracy L.; Simon, M., The Variability of T Tauri, RY Tauri, and RW Aurigae from 1899 to 1952, The Astronomical Journal, 2001, 122 (1): 413–417, Bibcode:2001AJ....122..413B, S2CID 14520286, arXiv:astro-ph/0104268 , doi:10.1086/321133
