Astronomy:Oph-IRS 48
250px Artist's impression of Oph-IRS 48's dust disk | |
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Ophiuchus |
| Right ascension | 16h 27m 37.18s[1] |
| Declination | −24° 30′ 35.3″[1] |
| Apparent magnitude (V) | 14.80[2] |
| Characteristics | |
| Spectral type | B5-F2[1] |
| Astrometry | |
| Proper motion (μ) | RA: −9.190[2] mas/yr Dec.: −23.995[2] mas/yr |
| Parallax (π) | 7.4375 ± 0.1157[2] mas |
| Distance | 439 ± 7 ly (134 ± 2 pc) |
| Details[1] | |
| Mass | 2 M☉ |
| Luminosity | 14.3 L☉ |
| Other designations | |
| Database references | |
| SIMBAD | data |
Oph-IRS 48, nicknamed the Cosmic Croissant for its unique shape, is a star surrounded by a protoplanetary disk, about 444 light-years from Earth in the constellation of Ophiuchus.[3] The disk has changed the view of planet formation in astronomy. Studies have shown that the millimeter dust particles are gathered in a crescent shape, while the gas (traced by CO molecules) and small dust grains follow a full disk ring structure.[3][4][5] The centimeter grains are even more concentrated inside the crescent.[6] This structure is consistent with theoretical predictions of dust trapping. Also the chemical composition has been studied, with molecules like H2CO being present.[7] The dust trap is thought to be conducting the process of planet formation in this young system.
References
- ↑ 1.0 1.1 1.2 1.3 Bruderer, Simon (2014). "Gas structure inside dust cavities of transition disks: Ophiuchus IRS 48 observed by ALMA". Astronomy and Astrophysics 562: A26. doi:10.1051/0004-6361/201322857. Bibcode: 2014A&A...562A..26B.
- ↑ 2.0 2.1 2.2 2.3 "2MASS J16273718-2430350". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=2MASS+J16273718-2430350.
- ↑ 3.0 3.1 ALMA Discovers Comet Factory.
- ↑ Simon Bruderer, Nienke van der Marel, Ewine F. van Dishoeck and Tim A. van Kempen, Gas structure inside dust cavities of transition disks: Oph-IRS 48 observed by ALMA, Astronomy and Astrophysics. 12/2013; p562.
- ↑ 'Dust Trap' around Distant Star May Solve Planet Formation Mystery.
- ↑ jp-carousel-117541.
- ↑ Nienke van der Marel (1), Ewine F. van Dishoeck (1 and 2), Simon Bruderer (2), Tim A. van Kempen, Warm formaldehyde in the Oph IRS 48 transitional disk.
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