Astronomy:DL Tauri
Coordinates: 
04h 33m 39.0767s, +25° 20′ 38.0980″
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Taurus |
| Right ascension | 04h 33m 39.0767s[2] |
| Declination | +25° 20′ 38.0980″[2] |
| Apparent magnitude (V) | 13.06[3] |
| Characteristics | |
| Evolutionary stage | pre-main-sequence star |
| Spectral type | K7[4] |
| Apparent magnitude (U) | 14.04[2] |
| Apparent magnitude (g) | 12.1368[5] |
| Apparent magnitude (B) | 14.59[2] |
| Apparent magnitude (R) | 11.85[2] |
| Variable type | T Tau[4] |
| Astrometry | |
| Proper motion (μ) | RA: 9.25±0.02[5] mas/yr Dec.: −18.497±0.017[5] mas/yr |
| Parallax (π) | 6.2525 ± 0.0194[5] mas |
| Distance | 522 ± 2 ly (159.9 ± 0.5 pc) |
| Details | |
| Mass | 0.72±0.11[4] M☉ |
| Luminosity | 0.68[4] L☉ |
| Temperature | 4060[4] K |
| Age | 1[6] Myr |
| Other designations | |
2MASS J04333906+2520382, TIC 268444139, HBC 58, UBV 4371, Gaia DR2 148010281032823552 | |
| Database references | |
| SIMBAD | data |
DL Tauri is a young T Tauri-type pre-main sequence stars in the constellation of Taurus about 522 light years away, belonging to the Taurus Molecular Cloud. It is partially obscured by the foreground gas cloud rich in carbon monoxide,[4] and is still accreting mass, producing 0.14 L☉ due to release of accretion energy.[3] The stellar spectrum shows the lines of ionized oxygen, nitrogen, sulfur and iron.[3]
Protoplanetary disk
Star is surrounded by a massive (0.029±0.003 M☉) protoplanetary disk,[7] which is extensive yet relatively flattened and rich in large grains, indicated a significantly evolved state. With a mass this massive the disk can possibly form a brown dwarf. The area of disk about 100 AU from the star may be on the verge of the gravitational instability.[7] The disk have a multiple dust rings with poorly resolved gaps between.[8]
Suspected planetary companion
The object 2MASS J04333960+2520420, designated DL Tau/cc1 in 2008, is a suspected superjovian planet with mass about 12MJ on the likely bound orbit around DL Tauri. The object is either a sub-brown dwarf or a low mass brown dwarf or even a low-mass ultra-cool red dwarf star if strongly veiled by accretion disk, which is not unusual for the young star systems.[6]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| protoplanetary disk | 8.18±0.89[7]–520[4] AU | — | — | |||
References
- ↑ "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. https://mast.stsci.edu/portal/Mashup/Clients/Mast/Portal.html.
- ↑ 2.0 2.1 2.2 2.3 2.4 "V* DL Tau". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=V%2A+DL+Tau.
- ↑ 3.0 3.1 3.2 Giannini, T.; Nisini, B.; Antoniucci, S.; Biazzo, K.; Alcalá, J.; Bacciotti, F.; Fedele, D.; Frasca, A. et al. (2019). "GIARPS High-resolution Observations of T Tauri stars (GHOsT)". Astronomy & Astrophysics 631: A44. doi:10.1051/0004-6361/201936085.
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 Simon, M.; Dutrey, A.; Guilloteau, S. (2000). "Dynamical Masses of T Tauri Stars and Calibration of Pre–Main-Sequence Evolution". The Astrophysical Journal 545 (2): 1034–1043. doi:10.1086/317838. Bibcode: 2000ApJ...545.1034S.
- ↑ 5.0 5.1 5.2 Brown, A. G. A. (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics 649: A1. doi:10.1051/0004-6361/202039657. Bibcode: 2021A&A...649A...1G. Gaia EDR3 record for this source at VizieR.
- ↑ 6.0 6.1 Itoh, Yoichi; Tamura, Motohide; Hayashi, Masahiko; Oasa, Yumiko; Hayashi, Saeko S.; Fukagawa, Misato; Kudo, Tomoyuki; Mayama, Satoshi et al. (2008). "Near-Infrared Spectroscopy of Faint Companions around Young Stellar Objects Associated with the Taurus Molecular Cloud". Publications of the Astronomical Society of Japan 60 (2): 209–218. doi:10.1093/pasj/60.2.209. Bibcode: 2008PASJ...60..209I.
- ↑ 7.0 7.1 7.2 Kwon, Woojin; Looney, Leslie W.; Mundy, Lee G.; Welch, William J. (2015), "Resolving Protoplanetary Disks at Millimeter Wavelengths with Carma", The Astrophysical Journal 808 (1): 102, doi:10.1088/0004-637X/808/1/102, Bibcode: 2015ApJ...808..102K
- ↑ Cite error: Invalid
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