HD 283572 is a young T Tauri-typepre-main sequence star in the constellation of Taurus about 414 light years away, belonging to the Taurus Molecular Cloud.[3] It is a rather evolved protostar which already dispersed its birth shroud.[4] 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.[6] HD 283572 will eventually evolve to an A-type main-sequence star when on the main sequence.[3] It is no longer accreting mass, and is magnetically decoupled from the remnants of the protoplanetary disk,[3] belonging to the terminal, 3rd phase of the disk evolution.[7]Submillimeter Array (SMA) 1.3mm observations of HD 283572 detected an extreme brightening event with a radio luminosity of 8.3x1016erg/s/Hz that spanned 9 hours on January 17th 2022.[8][9]
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.[8][9]
Protoplanetary system
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.[7] A search for planetary transits was performed but no planets were detected as of 2019.[10]
^ abcdeTorres, 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, S2CID16357104
^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
^ abYasui, 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, S2CID202718804
