金牛座RY

**金牛座RY**
	; 改編自伊斯梅洛夫（英語：Ismailov）和; 阿迪格扎爾扎德（英語：Adygezalzade）; （2012）和伊斯梅洛夫等人（2011）; 和希瓦克（英語：Siwak）等人(2011); 的金牛座IK可見光波段的光變曲線，; 顯示三種不同時間尺度上的變化。
觀測資料; 曆元 J2000
星座	金牛座
星官
赤經	04h 21m 57.4133s
赤緯	+28° 26′ 35.5340″
視星等（V）	9.5 - 11.5
特性
演化階段	主序前星
光譜分類	F7
視星等 (G)	10.706
變星類型	金牛T
天體測定
徑向速度 (Rv)	24.3+1.9; − km/s
自行 (μ)	赤經：8.744 mas/yr ; 赤緯：−27.002 mas/yr
視差 (π)	7.2349 ± 0.2031 mas
距離	450 ± 10 ly ; (138 ± 4 pc)
絕對星等 (MV)	+2.11 (at magnitude 9.55)
位置（相對於金牛座RY）
組成恆星	2MASS J04215810+2826300
角距離	10.83″
位置角	122.41°
觀測到的相距; （估計）	1500 AU
詳細資料
質量	2.0 M☉
半徑	3.2 R☉
表面重力 (log g)	3.8
亮度	11.6 L☉
溫度	5,945 K
年齡	4.7+1.00; −0.90 Myr
其他命名
	BD+28 645、HD 283571、HIP 20387、TYC 1828-129-1、GSC 01828-00129、2MASS J04215740+2826355
參考資料庫
SIMBAD	資料

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7002450000000000000♠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]

Quick Facts 觀測資料曆元 J2000, 特性 ...

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恆星系統

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

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]。

More information 成員 (依恆星距離), 質量 ...

金牛座RY的行星系^[13]
成員 (依恆星距離)	質量	半長軸 (AU)	軌道周期 (天)	離心率	傾角	半徑
原行星盤	0.21 — 80 AU				65°	—

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變異性

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

[1]
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.
[2]
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]}
[3]
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]
V* RY Tau. SIMBAD. 斯特拉斯堡天文資料中心.
[5]
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]
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]
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 . 已忽略未知參數|collaboration= (幫助) (勘誤: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
[8]
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]
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]
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]
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 
[12]
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 . 已忽略未知參數|collaboration= (幫助) (勘誤: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
[13]
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]
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
[15]
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
[16]
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
[17]
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

[Ismailov2012-1] [1]
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.

[Ismailov2011-2] [2]
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-3] [3]
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 .

[SIMBAD-4] [4]
V* RY Tau. SIMBAD. 斯特拉斯堡天文資料中心.

[gorda2019-5] [5]
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

[Giannini2019-6] [6]
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

[EDR3-7] [7]
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 . 已忽略未知參數|collaboration= (幫助) (勘誤: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.

[gcvs-8] [8]
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.

[davies2020-9] [9]
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

[Monnier2006-10] [10]
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

[Itoh2008-11] [11]
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 

[12] [12]
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 . 已忽略未知參數|collaboration= (幫助) (勘誤: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.

[Davies2020-13] [13]
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

[Garufi2019-14] [14]
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

[15] [15]
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

[16] [16]
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

[17] [17]
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

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[13]

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[15]

[16]

[17]

觀測資料曆元 J2000
改編自伊斯梅洛夫（英語：Ismailov）和阿迪格扎爾扎德（英語：Adygezalzade）（2012）^[1]和伊斯梅洛夫等人（2011）^[2] 和希瓦克（英語：Siwak）等人(2011)^[3] 的金牛座IK可見光波段的光變曲線，顯示三種不同時間尺度上的變化。
星座	金牛座
星官
赤經	04^h 21^m 57.4133^s^[4]
赤緯	+28° 26′ 35.5340″^[4]
視星等（V）	9.5 - 11.5^[5]
特性
演化階段	主序前星
光譜分類	F7^[6]
視星等 (G)	10.706^[7]
變星類型	金牛T^[8]
天體測定

徑向速度 (R_v)	24.3+1.9 − km/s
自行 (μ)	赤經：8.744^[7] mas/yr 赤緯：−27.002^[7] mas/yr
視差 (π)	7.2349 ± 0.2031^[7] mas
距離	450 ± 10 ly (138 ± 4 pc)
絕對星等 (M_V)	+2.11 (at magnitude 9.55)^[5]

位置（相對於金牛座RY）
組成恆星	2MASS J04215810+2826300
角距離	10.83″
位置角	122.41°
觀測到的相距（估計）	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	7000470000000000000♠4.7+1.00 −0.90^[5] Myr

其他命名
BD+28 645、HD 283571、HIP 20387、TYC 1828-129-1、GSC 01828-00129、2MASS J04215740+2826355
參考資料庫
SIMBAD	資料