OTS 44 is a free-floating planetary-mass object or brown dwarf located at 550 light-years (170 pc) in the constellation Chamaeleon near the reflection nebula IC 2631. It is among the lowest-mass free-floating substellar objects, with approximately 11.5 times the mass of Jupiter, or approximately 1.1% that of the Sun.[2][4]
Its radius is not very well known and is estimated to be 23–57% that of the Sun.[1][3]
OTS 44 was discovered in 1998 by Oasa, Tamura, and Sugitani as a member of the star-forming region Chamaeleon I.[5][6] Based upon infrared observations with the Spitzer Space Telescope and the Herschel Space Observatory, OTS 44 emits an excess of infrared radiation for an object of its type, suggesting it has a circumstellar disk of dust and particles of rock and ice.[1][3][7] This disk (gas+dust) has a SED-fitted mass of at about 30 Earth masses.[3] Observations with the SINFONI spectrograph at the Very Large Telescope show that the disk
is accreting matter at the rate of approximately 10−11 of the mass of the Sun per year.[3] It could eventually develop into a planetary system. Observations with ALMA detected the disk in millimeter wavelengths. The observations constrained the dust mass of the disk between 0.07 and 0.63 ME, but these mass estimates are limited by assumptions on poorly constrained parameters.[8]
^ abcdefCite error: The named reference apj620_1_L51 was invoked but never defined (see the help page).
^ abcCite error: The named reference Bonnefoy2014_AA562 was invoked but never defined (see the help page).
^ abcdefgCite error: The named reference joergens2013_AA558 was invoked but never defined (see the help page).
^Luhmann, K. L.; Peterson, D. E.; Megeath, S. T. (2004). "Spectroscopic Confirmation of the Least Massive Known Brown Dwarf in Chamaeleon". The Astrophysical Journal. 617 (1): 565–568. arXiv:astro-ph/0411445. Bibcode:2004ApJ...617..565L. doi:10.1086/425228. S2CID 18157277.
^Tamura, M.; Itoh, Y.; Oasa, Y.; Nakajima, T. (1998). "Isolated and Companion Young Brown Dwarfs in the Taurus and Chamaeleon Molecular Clouds". Science. 282 (5391): 1095–7. Bibcode:1998Sci...282.1095T. doi:10.1126/science.282.5391.1095. PMID 9804541.
^Oasa, Y.; Tamura, M.; Sugitani, K. (1999). "A Deep Near-Infrared Survey of the Chamaeleon I Dark Cloud Core". The Astrophysical Journal. 526 (1): 336–343. Bibcode:1999ApJ...526..336O. doi:10.1086/307964.
^"Blurring the lines between stars and planets: Lonely planets offer clues to star formation". MPIA Science Release 2013-09. Retrieved 1 September 2014.
^Bayo, Amelia; Joergens, Viki; Liu, Yao; Brauer, Robert; Olofsson, Johan; Arancibia, Javier; Pinilla, Paola; Wolf, Sebastian; Ruge, Jan Philipp; Henning, Thomas; Natta, Antonella (May 2017). "First Millimeter Detection of the Disk around a Young, Isolated, Planetary-mass Object". Astrophysical Journal Letters. 841 (1): L11. Bibcode:2017ApJ...841L..11B. doi:10.3847/2041-8213/aa7046. hdl:10150/624481. ISSN 0004-637X. S2CID 73605838.
OTS44 is a free-floating planetary-mass object or brown dwarf located at 550 light-years (170 pc) in the constellation Chamaeleon near the reflection...
OTS44 is surrounded by a disk of at least 10 Earth masses and thus could eventually form a mini planetary system. Spectroscopic observations of OTS 44...
believed to be orbited by a tiny protoplanetary disc, and the sub-brown dwarf OTS44 was shown to be surrounded by a substantial protoplanetary disk of at least...
July 27, 2017. "The Caligula Effect Cast". Retrieved August 30, 2018. "OTs-44 - Girls' Frontline Wiki". www.gfwiki.com. Archived from the original on...
rogue planets, planets ejected from their original stellar system (e.g., OTS44 or Cha 110913−773444), though they are difficult to distinguish from sub-brown...
~180–290 pc, metallicity is ~0.004 ZSol. Transitional brown dwarfs. Least massive OTS44 M9.5 11h 10m 11.5s −76° 32′ 13″ Chamaeleon Has a mass range of 11.5–15 MJ...
Bonnefoy, M.; Liu, Y.; Bayo, A.; Wolf, S.; Chauvin, G.; Rojo, P. (2013). "OTS44: Disk and accretion at the planetary border". Astronomy & Astrophysics....
KPNO-Tau 12), Lupus I Cloud and the Chamaeleon Complex (e.g. the well studied OTS44 and Cha 110913−773444). These objects with disks are free-floating and are...
Georg Ots Music School of Tallinn (Estonian: Georg Otsa nimeline Tallinna Muusikakool) was a music school in Tallinn, Estonia. The school was formed 1944...
dwarf system DK Cha DK 12h 53m 17.20s −77° 07′ 10.73″ F0 Orion variable OTS44 11h 10m 11.5s −76° 32′ 13″ M9.5 One of the smallest known brown dwarfs Table...
profession and consists of occupational therapists (OTs) and occupational therapy assistants (OTAs). While OTs and OTAs have different roles, they both work...
World War II. The first assault rifle to see major usage was the German StG 44, a development of the earlier Mkb 42. While immediately after World War II...
used since its invention. There is a modern revolver of Russian design, the OTs-38, which uses ammunition that incorporates the silencing mechanism into...
Harald Vilimsky als Spitzenkandidat für EU-Wahl am 9. Juni 2024 fixiert". OTS.at (in German). Retrieved 18 January 2024. red, ORF at (22 January 2024)...
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