ROXs 42Bb
Direct imaging | |
| Orbital characteristics | |
|---|---|
| 1968.3[2] | |
| Star | ROXs 42B |
| Physical characteristics | |
Mean radius | 2.43±0.18 – 2.55±0.2[3] RJ |
| Mass | 9.0+6 −3[3] MJ |
| 3.8 ± 0.2[3] g | |
| Temperature | 1,800-2,600 K[3] |
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.
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
References
- ^ S2CID 118464822.
- ^ "Exoplanet-catalog".
- ^ S2CID 118376549.
- S2CID 122944079.
2013 in space | ||
|---|---|---|
Space probes |
| |
| Space observatories | ||
- DENIS-P J082303.1−491201 b
- Gliese 504 b
- Gliese 667
- e
- f
- g
- h?
- HD 95086 b
- HD 100546 b
- HD 106906 b
- blue color of HD 189733 b
- cloud map of Kepler-7b
- Kepler-37
- Kepler-61b
- Kepler-62
- Kepler-65
- b
- c
- d
- Kepler-68
- Kepler-69
- Kepler-78b
- MOA-2011-BLG-262Lb
- PSO J318.5−22 (rogue planet)
- ROXs 42Bb
- Luhman 16
- GRB 130427A
- Hippocamp
- 1E 2259+586 anti-glitch
- M60-UCD1
- z8_GND_5296
- Hercules–Corona Borealis Great Wall
- Water vapor plumes of Europa
- C/2011 L4 (PANSTARRS)
- C/2012 F6 (Lemmon)
- C/2012 S4 (PANSTARRS)
- C/2013 A1 (Siding Spring)
- Comet ISON
- C/2013 R1 (Lovejoy)
- P/2013 P5 (PanSTARRS)
- Herschel Space Observatory retirement (Jun 2013)
- Cassini–Huygens (The Day the Earth Smiled; Jul 2013)
- Voyager 1 (enters interstellar space; Sep 2013)
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