Oph-IRS 48

Oph-IRS 48
	; Artist's impression of Oph-IRS 48's dust disk
Observation data; Epoch J2000 Equinox J2000
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 mas[2]
Distance	439 ± 7 ly ; (134 ± 2 pc)
Details[1]
Mass	2 M☉
Luminosity	14.3 L☉
Other designations
	IRAS 16245-2423, 2MASS J16273718-2430350 Gaia DR2 6049145880875631744
Database references
SIMBAD	data

Oph-IRS 48 is a star surrounded by an extraordinary protoplanetary disk, about 444 light-years from Earth in the constellation of Ophiuchus.[3] The disk has revolutionized 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

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.
"2MASS J16273718-2430350". SIMBAD. Centre de données astronomiques de Strasbourg.
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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[ALMA-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.

[SIMBAD-2] "2MASS J16273718-2430350". SIMBAD. Centre de données astronomiques de Strasbourg.

[ALMA_Discovers_Comet_Factory-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] -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.