ROXs 42Bb is a directly imaged planetary-mass companion[1] to the binary M star ROXs 42B,[4] a likely member of the Rho Ophiuchi cloud complex. The companion was announced/discovered on October 17, 2013, by University of Toronto astronomer Thayne Currie.
ROXs 42Bb
ROXs 42B and its companion (small red object on the right) with VLT MUSE
The object has an estimated mass around 9 Jupiter masses, depending on the age of the star,[1] similar to the masses of directly imaged planets around HR 8799 and beta Pictoris. However, it is unclear whether ROXs 42Bb formed like these planets via core accretion, by disk (gravitational) instability, or more like a binary star. Preliminary fits of the spectra and broadband photometry to atmospheric models imply a radius of 2.43 ± 0.18RJ for an effective temperature of about 2,000 K or a radius of 2.55 ± 0.20RJ for about 1950 K.[3] Like Beta Pictoris b, ROXs 42Bb's atmosphere is likely very cloudy and dusty.[3]
^ abcdefCurrie, Thayne; Burrows, Adam; Daemgen, Sebastian (2014). "A First-Look Atmospheric Modeling Study of the Young Directly-Imaged Planet-Mass Companion, ROXs 42Bb". The Astrophysical Journal. 787 (2): 104. arXiv:1404.0131. Bibcode:2014ApJ...787..104C. doi:10.1088/0004-637X/787/2/104. S2CID 118376549.
^Simon, Michael; Ghez, A. M.; Leinert, Ch.; Cassar, L.; Chen, W. P.; Howell, R. R.; Jameson, R. F.; Matthews, K.; Neugebauer, G.; Richichi, A. (1995). "A lunar occultation and direct imaging survey of multiplicity in the Ophiuchus and Taurus star-forming regions" (PDF). The Astrophysical Journal. 443: 625. Bibcode:1995ApJ...443..625S. doi:10.1086/175554. S2CID 122944079.
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roxs, 42bb, directly, imaged, planetary, mass, companion, binary, star, roxs, likely, member, ophiuchi, cloud, complex, companion, announced, discovered, october, 2013, university, toronto, astronomer, thayne, currie, roxs, companion, small, object, right, wit. ROXs 42Bb is a directly imaged planetary mass companion 1 to the binary M star ROXs 42B 4 a likely member of the Rho Ophiuchi cloud complex The companion was announced discovered on October 17 2013 by University of Toronto astronomer Thayne Currie ROXs 42BbROXs 42B and its companion small red object on the right with VLT MUSEDiscoveryDiscovered byCurrie et al 1 Discovery siteKeck Telescope Very Large Telescope Subaru TelescopeDiscovery dateOctober 17 2013Detection methodDirect imagingOrbital characteristicsOrbital period sidereal 1968 3 2 StarROXs 42BPhysical characteristicsMean radius2 43 0 18 2 55 0 2 3 RJMass9 0 6 3 3 MJSurface gravity3 8 0 2 3 gTemperature1 800 2 600 K 3 The object has an estimated mass around 9 Jupiter masses depending on the age of the star 1 similar to the masses of directly imaged planets around HR 8799 and beta Pictoris However it is unclear whether ROXs 42Bb formed like these planets via core accretion by disk gravitational instability or more like a binary star Preliminary fits of the spectra and broadband photometry to atmospheric models imply a radius of 2 43 0 18 RJ for an effective temperature of about 2 000 K or a radius of 2 55 0 20 RJ for about 1950 K 3 Like Beta Pictoris b ROXs 42Bb s atmosphere is likely very cloudy and dusty 3 See also editList of largest exoplanetsReferences edit a b c Currie Thayne Daemgen Sebastian Debes John Lafreniere David Itoh Yoichi Jayawardhana Ray Ratzka Thorsten Correia Serge 2014 Direct Imaging and Spectroscopy of a Candidate Companion Below Near the Deuterium Burning Limit In The Young Binary Star System ROXs 42B The Astrophysical Journal Letters 780 2 30 arXiv 1310 4825 Bibcode 2014ApJ 780L 30C doi 10 1088 2041 8205 780 2 L30 S2CID 118464822 Exoplanet catalog a b c d e f Currie Thayne Burrows Adam Daemgen Sebastian 2014 A First Look Atmospheric Modeling Study of the Young Directly Imaged Planet Mass Companion ROXs 42Bb The Astrophysical Journal 787 2 104 arXiv 1404 0131 Bibcode 2014ApJ 787 104C doi 10 1088 0004 637X 787 2 104 S2CID 118376549 Simon Michael Ghez A M Leinert Ch Cassar L Chen W P Howell R R Jameson R F Matthews K Neugebauer G Richichi A 1995 A lunar occultation and direct imaging survey of multiplicity in the Ophiuchus and Taurus star forming regions PDF The Astrophysical Journal 443 625 Bibcode 1995ApJ 443 625S doi 10 1086 175554 S2CID 122944079 nbsp This extrasolar planet related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title ROXs 42Bb amp oldid 1218954438, wikipedia, wiki, book, books, library,
