 A combined y band (near-infrared) and visual band light curve for V987 Tauri, adapted from Strassmeier and Rice (1998)[1] | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Taurus[2] |
| Right ascension | 04h 21m 58.8485s[3] |
| Declination | +28° 18′ 06.513″[3] |
| Apparent magnitude (V) | 8.87 – 9.1[4] |
| Characteristics | |
| Evolutionary stage | pre-main-sequence star[5] |
| Spectral type | G5[6] |
| Apparent magnitude (B) | 9.80[7] |
| Apparent magnitude (G) | 8.80[7] |
| Apparent magnitude (R) | 9.14[7] |
| Apparent magnitude (J) | 7.414[7] |
| Variable type | T Tau[6] |
| Astrometry | |
| Radial velocity (Rv) | 15.0±1.5[6] km/s |
| Proper motion (μ) | RA: 8.837±0.027 mas/yr[3] Dec.: −26.426±0.017 mas/yr[3] |
| Parallax (π) | 7.8735±0.0190 mas[3] |
| Distance | 414.2 ± 1.0 ly (127.0 ± 0.3 pc) |
| Details | |
| Mass | 1.6[6] M☉ |
| Radius | 2.2[6] R☉ |
| Luminosity | 5.5[6] L☉ |
| Temperature | 5,770[6] K |
| Metallicity [Fe/H] | 0.7±0.2[5] dex |
| Rotation | 1.55 d[5] |
| Rotational velocity (v sin i) | 78[5] km/s |
| Age | 9[6] Myr |
| Other designations | |
| V987 Tauri, BD+27 657, HD 283572, HIP 20388, TYC 1828-481-1, GSC 01828-00481, 2MASS J04215884+2818066[7] | |
| Database references | |
| SIMBAD | data |
HD 283572 is a young T Tauri-type pre-main sequence star in the constellation of Taurus about 414 light years away, belonging to the Taurus Molecular Cloud.[5] It is a rather evolved protostar which already dispersed its birth shroud.[6] The star emits a very high X-ray flux of 1031 ergs/s. That radiation flux associated with the magnetic activity induced a high coronal temperature of 3 keV and regular flares.[8] HD 283572 will eventually evolve to an A-type main-sequence star when on the main sequence.[5] It is no longer accreting mass, and is magnetically decoupled from the remnants of the protoplanetary disk,[5] belonging to the terminal, 3rd phase of the disk evolution.[9] Submillimeter Array (SMA) 1.3mm observations of HD 283572 detected an extreme brightening event with a radio luminosity of 8.3×1016 erg/s/Hz that spanned 9 hours on January 17th 2022.[10][11] Although HD 283572 was observed by the SMA on 8 separate nights, millimeter emission was detected on one night only, strongly suggesting stellar variability as a result of an extreme stellar flare.[10][11]
In 1987, Frederick M. Walter et al. announced that HD 283572 is a variable star.[12] It was given its variable star designation, V987 Tauri, in 1989.[13]
Protoplanetary system
[edit]HD 283572 is surrounded by a light (<0.0004 M☉) and faint protoplanetary disk with uncertain inclination. Different instruments yielded measurements of disk inclination to the plane of sky from 35 to 60 degrees.[9] A search for planetary transits was performed but no planets were detected as of 2019.[14]
References
[edit]- ^ Strassmeier, K. G.; Rice, J. B. (November 1998). "Doppler imaging of stellar surface structure. IX. A high-resolution image of the weak-lined T Tauri star HDE 283572 = V987 Tauri". Astronomy and Astrophysics. 339: 497–506. Bibcode:1998A&A...339..497S.
- ^ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Constellation record for this object at VizieR.
- ^ a b c d Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ "V987 Tau". International Variable Star Index. AAVSO. Retrieved 2025-11-02.
- ^ a b c d e f g Scelsi, L.; Maggio, A.; Peres, G.; Pallavicini, R. (2005), "Coronal properties of G-type stars in different evolutionary phases", Astronomy & Astrophysics, 432 (2): 671–685, arXiv:astro-ph/0501631, Bibcode:2005A&A...432..671S, doi:10.1051/0004-6361:20041739, S2CID 15298988
- ^ a b c d e f g h i Torres, Rosa M.; Loinard, Laurent; Mioduszewski, Amy J.; Rodriguez, Luis F. (2007), "VLBA Determination of the Distance to Nearby Star-forming Regions. II. Hubble 4 and HDE 283572 in Taurus", The Astrophysical Journal, 671 (2): 1813–1819, arXiv:0708.4403, Bibcode:2007ApJ...671.1813T, doi:10.1086/522924, S2CID 16357104
- ^ a b c d e "HD 283572". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-11-01.
- ^ Favata, F.; Micela, G.; Sciortino, S. (1998), "X-ray spectroscopy of the weak-lined T Tauri star HD 283572", Astronomy and Astrophysics, 336: 413–420, Bibcode:1998A&A...337..413F
- ^ a b Yasui, Chikako; Hamano, Satoshi; Fukue, Kei; Kondo, Sohei; Sameshima, Hiroaki; Takenaka, Keiichi; Matsunaga, Noriyuki; Ikeda, Yuji; Kawakita, Hideyo; Otsubo, Shogo; Watase, Ayaka; Taniguchi, Daisuke; Mizumoto, Misaki; Izumi, Natsuko; Kobayashi, Naoto (2019), "Possible Progression of Mass-flow Processes around Young Intermediate-mass Stars Based on High-resolution Near-infrared Spectroscopy. I. Taurus", The Astrophysical Journal, 886 (2): 115, arXiv:1909.09850, Bibcode:2019ApJ...886..115Y, doi:10.3847/1538-4357/ab45ee, S2CID 202718804
- ^ a b Lovell, Joshua Bennett; Keating, Garrett K.; Wilner, David J.; Andrews, Sean M.; MacGregor, Meredith; Rahman, Ramisa Akther; Rao, Ramprasad; Williams, Jonathan P. (February 2024). "SMA Detection of an Extreme Millimeter Flare from the Young Class III Star HD 283572". The Astrophysical Journal Letters. 962 (1): L12. arXiv:2402.01833. Bibcode:2024ApJ...962L..12L. doi:10.3847/2041-8213/ad18ba.
- ^ a b Extreme Eruption on Young Sun-like Star Signals Savage Environment for Developing Exoplanets
- ^ Walter, F. M.; Brown, A.; Linsky, J. L.; Rydgren, A. E.; Vrba, F.; Roth, M.; Carrasco, L.; Chugainov, P. F.; Shakovskaya, N. I.; Imhoff, C. L. (March 1987). "X-Ray Sources in Regions of Star Formation. II. The Pre--Main-Sequence G Star HDE 283572". Astrophysical Journal. 314: 297–307. Bibcode:1987ApJ...314..297W. doi:10.1086/165059.
- ^ Kholopov, P. N.; Samus, N. N.; Kazarovets, B. V.; Frolov, M. S.; Kireeva, N. N. (April 1989). "The 69th Name-List of Variable Stars". Information Bulletin on Variable Stars. 3323: 1. Bibcode:1989IBVS.3323....1K.
- ^ Hambálek, Ľ.; Vaňko, M.; Paunzen, E.; Smalley, B. (2019), "T Tauri stars in the SuperWASP and NSVS surveys", Monthly Notices of the Royal Astronomical Society, 483 (2): 1642–1654, arXiv:1811.08655, Bibcode:2019MNRAS.483.1642H, doi:10.1093/mnras/sty3151
