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CVSO 30 (PTFO 8-8695) is a binary T Tauri star, located in constellation Orion at 1200 light years from Earth away with one candidate planet called CVSO 30 c. The candidate planet is a gas giant.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Orion |
| Right ascension | 05h 25m 07.556s[1] |
| Declination | +01° 34′ 24.349″[1] |
| Apparent magnitude (V) | +16.26[2] |
| Characteristics | |
| Spectral type | M3[2] |
| Variable type | T Tau[2] |
| Astrometry | |
| Proper motion (μ) | RA: +1.73[1] mas/yr Dec.: +0.13[1] mas/yr |
| Parallax (π) | 2.861 ± 0.075[1] mas |
| Distance | 1140 ± 30 ly ly (349.5 ± 9.2[1] pc) |
| Details | |
| Mass | 0.39 ± 0.05[2] M☉ |
| Radius | 1.39[2] R☉ |
| Temperature | 3740[2] K |
| Age | 2.65[3] Myr |
| Other designations | |
2MASS J05250755+0134243, PTFO 8-8695 | |
| Database references | |
| SIMBAD | data |
Planetary system
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (years) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| c (unconfirmed) | 4.7 MJ | 660 | 27000 | — | — | — |
CVSO 30 may have one planet called CVSO 30 c. CVSO 30 c is calculated to have a period of 27,000 years and a semimajor axis of 660 AU.
Direct imaging of the suspected CVSO 30 c, with a calculated mass equal to 4.7 Jupiter's, has been achieved through photometric and spectroscopic high contrast observations carried out with the Very Large Telescope located in Chile, the Keck Observatory in Hawaii and the Calar Alto Observatory in Spain.[4] However, the colors of the object suggest that it may actually be a background star, such as a K-type giant or a M-type subdwarf.[5]
By 2020, the phase of "dips" caused by suspected planet CVSO 30 b had drifted nearly 180 degrees from the expected value, thus ruling out the existence of the planet. Instead, a rare type of stellar starspot activity with very large starspots is now suspected. Also, CVSO 30 is suspected to be a stellar binary, with the previously reported planetary orbital period equal to the rotation period of the companion star.[6] Further investigation of "dips" by 2022 led to hypothesis of a large dust cloud close to synchronous orbit.[7]
References
- "CVSO 30". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 5 October 2018.
- Van Eyken, Julian C.; et al. (2012). "The Ptf Orion Project: A Possible Planet Transiting a T-Tauri Star". The Astrophysical Journal. 755 (1): 42. arXiv:1206.1510. Bibcode:2012ApJ...755...42V. doi:10.1088/0004-637X/755/1/42. S2CID 2753064.
- "Extrasolar Planets Encyclopaedia". Retrieved 15 November 2016.
- "Amazing Photo Shows Likely Alien Planet 1,200 Light-Years Away". MSN. 21 June 2016. Archived from the original on 11 August 2016. Retrieved 22 June 2016.
- Lee, Chien-Hsiu; Chiang, Po-Shih (2018). "Evidence that the Planetary Candidate CVSO30c is a Background Star from Optical, Seeing-limited Data". The Astrophysical Journal. 852 (2): L24. arXiv:1712.08727. Bibcode:2018ApJ...852L..24L. doi:10.3847/2041-8213/aaa40b. S2CID 119270170.
- Koen, C.; et al. (2020). "Properties of CVSO 30 from TESS measurements: Probably a binary T Tauri star with complex light curves and no obvious planets". Monthly Notices of the Royal Astronomical Society. 494 (3): 4349–4356. arXiv:2005.10253. doi:10.1093/mnras/staa1038.
- Bischoff, R.; et al. (2022). "YETI follow-up observations of the T Tauri star CVSO 30 with transit-like dips". Monthly Notices of the Royal Astronomical Society. arXiv:2201.12405. doi:10.1093/mnras/stac293.
Further reading
- Koen, C. (2015). "Multicolour time series photometry of the T Tauri star CVSO 30". Monthly Notices of the Royal Astronomical Society. 450 (4): 3991–3998. Bibcode:2015MNRAS.450.3991K. doi:10.1093/mnras/stv906.
- Raetz, St.; et al. (2016). "YETI observations of the young transiting planet candidate CVSO 30 b". Monthly Notices of the Royal Astronomical Society. 460 (3): stw1159. arXiv:1605.05091. Bibcode:2016MNRAS.460.2834R. doi:10.1093/mnras/stw1159. S2CID 56346914.
На других языках
[de] CVSO 30
CVSO 30 ist ein T-Tauri-Stern in 1200 Lichtjahren Entfernung von der Sonne, nordwestlich des Orion-Gürtels.- [en] CVSO 30
[ru] CVSO 30
CVSO 30 (PTFO 8-8695) — звезда типа T Тельца в созвездии Ориона на расстоянии 1200 световых лет от Солнца. Обладает, предположительно, двумя планетами (CVSO 30 b и CVSO 30 c), представляющими собой газовые гиганты. Первая звезда, планеты которой были обнаружены как с помощью метода прохождений, так и непосредственно при получении изображений. CVSO 30 принадлежит молодой звёздной группе 25 Ориона.Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.
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