View source for Astronomy:IRAS 16293-2422

{{Starbox begin 
| name = 16293–2422 }}
{{Starbox image 
| image=[[File:Sugar molecules in the gas surrounding a young Sun-like star.ogv|250px]] 
| caption=This video starts with a broad panorama of the spectacular central regions of the [[Astronomy:Milky Way|Milky Way]] seen in visible light. It then zooms in to the Rho Ophiuchi star-forming region in [[Physics:Infrared|infrared]] light, highlighting '''IRAS 16293–2422'''. Finally, we see an artist's impression of glycolaldehyde molecules, showing glycolaldehyde's molecular structure {{chem|C|2|H|4|O|2}}. }}
{{Starbox observe 
| epoch = [[Astronomy:J2000.0|J2000.0]] 
| constell = [[Astronomy:Ophiuchus|Ophiuchus]]
| ra = {{RA|16|32|22.56}}
| dec = {{DEC|-24|28|31.8}}
| appmag_v = 
}}
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{{Starbox catalog
|names= WISE J163222.62-242833.6
}}
{{Starbox reference
| Simbad = IRAS+16293-2422
}}
{{Starbox end}}

'''IRAS 16293–2422''' is a binary system consisting of at least two forming [[Astronomy:Protostar|protostar]]s A and B, separated by a distance of 700 astronomical units (AU), all having masses similar to that of the [[Astronomy:Sun|Sun]].<ref name="Wootten1989" /><ref name="Ceccarelli2000a" />  It is located in the [[Astronomy:Rho Ophiuchi cloud complex|Rho Ophiuchi]] star-forming region. Astronomers using the [[Astronomy:Atacama Large Millimeter Array|ALMA array]] found [[Chemistry:Glycolaldehyde|glycolaldehyde]] — a simple form of sugar — in the gas surrounding the star.<ref name="Jorgensen2012" /><ref name="ESO1234" /> This discovery was the first time sugar has been found in space around a solar-type star on scales corresponding to the distance between Sun and Uranus - i.e., the scales where a planet-forming disk is expected to arise. The discovery shows that the building blocks of life may in the right place, at the right time, to be included in planets forming around the star.

The [[Astronomy:Accretion disk|accretion disk]] was found to have parts rotating in opposite directions,<ref name="remijan2005" /> the first time such a discovery has been made, and means that when planets form, the inner planets may orbit the opposite direction to the outer planets.<ref name="prfinley2006" />

==References==
{{reflist|refs=

<ref name="Ceccarelli2000a">{{cite journal | last=Ceccarelli | first=C. | last2=Castets | first2=A. | last3=Caux | first3=E. | last4=Hollenbach | first4=D. | last5=Loinard | first5=L. | last6=Molinari | first6=S. | last7=Tielens | first7=A. G. G. M. | display-authors=3 | title=The structure of the collapsing envelope around the low-mass protostar IRAS 16293–2422 | journal=Astronomy and Astrophysics | volume=355 | date=2000 | pages=1129–37 | issn=0004-6361 | bibcode = 2000A&A...355.1129C }}{{open access}}</ref>

<ref name="ESO1234">{{cite press release | url=http://www.eso.org/public/news/eso1234/ | title=Sugar molecules in the gas surrounding a young Sun-like star | publisher=[[Organization:European Southern Observatory|ESO]] | date=February 29, 2012 }}</ref>

<ref name="Jorgensen2012">{{cite journal | last=Jørgensen | first=J. K. | last2=Favre | first2=C. | last3=Bisschop | first3=S. E. | last4=Bourke | first4=T. L. | last5=van Dishoeck | first5=E. F. | last6=Schmalzl | first6=M. | display-authors=3 | title=Detection of the Simplest Sugar, Glycolaldehyde, in a Solar-type Protostar with ALMA | journal=The Astrophysical Journal Letters | volume=757 | date=2012 | pages=L4 | bibcode=2012ApJ...757L...4J | doi = 10.1088/2041-8205/757/1/L4 |arxiv = 1208.5498 }}{{open access}}</ref>

<ref name="remijan2005">{{cite journal | doi=10.1086/500239 | title=IRAS 16293-2422: Evidence for Infall onto a Counterrotating Protostellar Accretion Disk  | author=Remijan, Anthony J. | author2=Hollis, J. M. | date=April 1, 2006 | journal=The Astrophysical Journal | volume=640 | pages=842–8 |arxiv = astro-ph/0512225 |bibcode = 2006ApJ...640..842R }}{{open access}}</ref>

<ref name="Wootten1989">{{cite journal | last=Wootten | first=Alwyn | title=The Duplicity of IRAS 16293-2422: A Protobinary Star? | journal=The Astrophysical Journal | volume=337 | date=1989 | pages=858 | doi=10.1086/167156 | bibcode = 1989ApJ...337..858W }}{{open access}}</ref>

<ref name="prfinley2006">{{cite press release | url=http://www.nrao.edu/pr/2006/counterdisk/ | title=Still-Forming Solar System May Have Planets Orbiting Star in Opposite Directions, Astronomers Say | publisher=[[Astronomy:National Radio Astronomy Observatory|National Radio Astronomy Observatory]] | date=February 13, 2006 | editor=Finley, Dave | location=New Mexico, United States }}</ref>

}}

{{Stars of Ophiuchus}}

[[Category:Ophiuchus (constellation)]]
[[Category:Binary stars]]
[[Category:Protostars]]
[[Category:IRAS catalogue objects|16293-2422]]



{{Sourceattribution|IRAS 16293-2422|1}}