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Oph-IRS 48

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Oph-IRS 48

Artist's impression of Oph-IRS 48's dust disk
Observation data
Epoch J2000      Equinox J2000
Constellation Ophiuchus
Right ascension 16 27 37.18
Declination −24° 30′ 35.3″
Apparent magnitude (V) 14.80
Characteristics
Spectral type B5-F2
Astrometry
Proper motion (μ) RA: −9.190 mas/yr
Dec.: −23.995 mas/yr
Parallax (π)7.4375 ± 0.1157 mas
Distance439 ± 7 ly
(134 ± 2 pc)
Details
Mass2 M☉
Luminosity14.3 L☉
Other designations
IRAS 16245-2423, 2MASS J16273718-2430350 Gaia DR2 6049145880875631744
Database references
SIMBADdata

Oph-IRS 48 is a star surrounded by a protoplanetary disk, about 444 light-years from Earth in the constellation of Ophiuchus. 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. The centimeter grains are even more concentrated inside the crescent. This structure is consistent with theoretical predictions of dust trapping. Also the chemical composition has been studied, with molecules like H2CO being present. The dust trap is thought to be conducting the process of planet formation in this young system.

References

  1. ^ Bruderer, Simon; et al. (2014). "Gas structure inside dust cavities of transition disks: Ophiuchus IRS 48 observed by ALMA". Astronomy and Astrophysics. 562: A26. arXiv:1312.2756. Bibcode:2014A&A...562A..26B. doi:10.1051/0004-6361/201322857. S2CID 21707964.
  2. ^ "2MASS J16273718-2430350". SIMBAD. Centre de données astronomiques de Strasbourg.
  3. ^ ALMA Discovers Comet Factory.
  4. 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.
  5. 'Dust Trap' around Distant Star May Solve Planet Formation Mystery.
  6. jp-carousel-117541.
  7. 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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