WISE J080822.18-644357.3
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Carina |
Right ascension | 08h 08m 22.18s[1] |
Declination | −64° 43′ 57.3″[1] |
Characteristics | |
Evolutionary stage | red dwarf |
Spectral type | M5.5V[2] |
Astrometry | |
Radial velocity (Rv) | 22.7 ± 0.5[1] km/s |
Proper motion ( | RA: −11.54±0.12[1] mas/yr Dec.: 25.61±0.10[1] mas/yr |
Parallax ( | 9.8599±0.0551[3] mas |
Distance | 331 ly (101.4 ± 0.6[1] pc) |
Details | |
Mass | 0.16+0.03 −0.04[1] M☉ |
Temperature | 3050 ± 100[1] K |
Age | 45+11 −7[4] Myr |
Other designations | |
WISE J080822.18-644357.3 | |
Database references | |
SIMBAD | data |
WISE J080822.18-644357.3, also called J0808, is a 45+11
−7 Myr old[4] star system in the Carina constellation with a circumstellar debris disk orbiting an M-type red dwarf about 331 lightyears from Earth.
On October 21, 2016, NASA's Goddard Space Flight Center announced that its citizen science project, Disk Detective, discovered a debris disk around J0808, using the WISE telescope, a M5.5V dwarf with significant infrared excess at both 12 and 22
A follow-up study with an optical spectrum obtained with the ANU Siding Spring 2.3 meter telescope showed a Li-rich M5-star with strong H
Debris disk
[edit]The fitting of a modeled disk with the Spectral Energy Distribution of J0808 indicates a disk temperature of about 263 K (-10 °C or 14 °F).[2] The follow-up study found that a single disk had a poor match with the 22
ALMA detected a third component with a temperature of 20 K (-253 °C or -424 °F). Using this temperature the researchers were able to estimate the dust mass to 0.057±0.006 M☉. This is higher than the disk mass around ~20 Myr old
A light curve from CTIO shows variations, which could be disk material blocking light from the star. The TESS light curve shows aperiodic dipping on timescales of 0.5–2 days.[7]
Peter Pan disks
[edit]Other stars and brown dwarfs were discovered to be similar to J0808, with signs of youth while being in an older moving group.[6][7] Together with J0808, these older low-mass accretors in nearby moving groups are being called Peter Pan disks.[8][7]
Gallery
[edit]-
Spectral Energy Distribution (SED) of J0808 (from Disk Detective talk page)
See also
[edit]- Peter Pan Disk
- Disk Detective
- HD 74389 another system discovered by Disk Detective volunteers
- Debris disk
- Protoplanetary disk
- Accretion disk
- T Tauri star
- Goddard Space Flight Center
- Citizen science
References
[edit]- ^ a b c d e f g h i j Flaherty, Kevin; Hughes, A. Meredith; Mamajek, Eric E.; Murphy, Simon J. (2019-02-13). "The Planet Formation Potential around a 45 Myr Old Accreting M Dwarf". The Astrophysical Journal. 872 (1): 92. arXiv:1812.04124. Bibcode:2019ApJ...872...92F. doi:10.3847/1538-4357/aaf794. ISSN 1538-4357. S2CID 119251811.
- ^ a b c Silverberg, Steven M.; Kuchner, Marc J.; Wisniewski, John P.; Gagné, Jonathan; Bans, Alissa S.; Bhattacharjee, Shambo; Currie, Thayne R.; Debes, John R.; Biggs, Joseph R. (14 October 2016). "A New M Dwarf Debris Disk Candidate in a Young Moving Group Discovered with Disk Detective". The Astrophysical Journal. 830 (2): L28. arXiv:1610.05293. Bibcode:2016ApJ...830L..28S. doi:10.3847/2041-8205/830/2/L28. ISSN 2041-8205. S2CID 119183849.
- ^ Gaia Collaboration (2018-08-01). "Gaia Data Release 2 - Summary of the contents and survey properties". Astronomy & Astrophysics. 616: A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. ISSN 0004-6361. S2CID 49211658.
- ^ a b Bell, Cameron P. M.; Mamajek, Eric E.; Naylor, Tim (2015-11-21). "A self-consistent, absolute isochronal age scale for young moving groups in the solar neighbourhood". Monthly Notices of the Royal Astronomical Society. 454 (1): 593–614. arXiv:1508.05955. Bibcode:2015MNRAS.454..593B. doi:10.1093/mnras/stv1981. ISSN 0035-8711. S2CID 55297862.
- ^ Ramsey, Sarah (2016-10-21). "Citizen Scientists Discover Potential New Exoplanet Hunting Ground". NASA. Retrieved 2020-01-08.
- ^ a b c Murphy, Simon J.; Mamajek, Eric E.; Bell, Cameron P. M. (2018-05-21). "WISE J080822.18−644357.3 – a 45 Myr-old accreting M dwarf hosting a primordial disc". Monthly Notices of the Royal Astronomical Society. 476 (3): 3290–3302. arXiv:1703.04544. Bibcode:2018MNRAS.476.3290M. doi:10.1093/mnras/sty471. ISSN 0035-8711. S2CID 119341475.
- ^ a b c d Silverberg, Steven M.; Wisniewski, John P.; Kuchner, Marc J.; Lawson, Kellen D.; Bans, Alissa S.; Debes, John H.; Biggs, Joseph R.; Bosch, Milton K. D.; Doll, Katharina; Luca, Hugo A. Durantini; Enachioaie, Alexandru; Hamilton, Joshua; Holden, Jonathan; Hyogo, Michiharu; the Disk Detective Collaboration (2020-01-14). "Peter Pan Disks: Long-lived Accretion Disks Around Young M Stars". The Astrophysical Journal. 890 (2): 106. arXiv:2001.05030. Bibcode:2020ApJ...890..106S. doi:10.3847/1538-4357/ab68e6. S2CID 210718358.
- ^ "Low-mass Stars | Steven M. Silverberg". www.nhn.ou.edu. Retrieved 2019-07-25.
External links
[edit]- AWI0005x3s talk page at diskdetective.org