AU Microscopii System

Exoplanetary Scratchpad [SysBP Img]

AU Microscopii is also known as Gl 803, HD 197481, and CD-31°17815. It forms a triple star system with the double red dwarf star AT MiC, located 1.2 ly away, which are also known as Gl 799, HD 196982, and CD-31°16135. An active flare star and about 12 Million Years old. First red dwarf found with a circumstellar disk and the nearest planetforming disk. Also the first system where particle size in disk determined. Constraints on where planets could exist was recently published. Patterns in the dust disks suggest planets. It is thought that Pluto-sized planetoids may have formed in the outer system. AT MiC A and B are separated by 24.2 to 40.8 AU, and are somewhat smaller than AU MiC. All components are part of the Beta Pictoris Moving Group.

AU Microscopii System Web Pages

• System of the Day
• http://www.solstation.com/stars/au-mic3.htm
• http://en.wikipedia.org/wiki/AU_Microscopii

AU Microscopii System In the News

Excess Infrared Detected by IRAS (1980s)

• http://adsbit.harvard.edu/cgi-bin/nph-iarticle_query?bibcode=1983ApJS...53..643J

Hubble Observed Flare (1992)

• article

Disk Imaged (Feb 2004)

• http://cfa-www.harvard.edu/press/archive/pr0411.html
• http://www.solstation.com/stars/kalas04a.pdf
• http://www.ifa.hawaii.edu/info/press-releases/AU_Mic2-24-04.html
• article
• http://www.space.com/scienceastronomy/planets_common_040302.html
• http://www.sciam.com/article.cfm?chanID=sa003&articleID=000D1E72-33E2-103D-B3E283414B7F0000
• http://www.berkeley.edu/news/media/releases/2004/02/26_dust.shtml

Disk observed by Hubble and Spitzer (2004)

• http://oposite.stsci.edu/pubinfo/pr/2004/33/paper1.pdf
• http://www.astronomy.com/asy/default.aspx?c=a&id=2648
• http://www.newscientist.com/article.ns?id=dn6780

Disk Clumps Detected (2004)

• http://www.ifa.hawaii.edu/info/press-releases/Liu0804.html
• http://arxiv.org/abs/astro-ph/0408164
• http://www.space.com/scienceastronomy/planet_formation_040812.html

Sharper Images Obtained (Aug 2005)

• http://www.sciam.com/article.cfm?chanID=sa003&articleID=000F1E16-226E-111D-941783414B7F4945
• http://www.space.com/scienceastronomy/planet_formation_040812.html

Dust Found to Be Light As Snow (Jan 2007)

• http://www.berkeley.edu/news/media/releases/2007/01/08_dust.shtml
  

Transit Detection Attempts (Apr 2007)

• http://fr.arxiv.org/abs/0704.3584
  

Mini-Planet Embros Detected (Oct 2007)

• http://www.rochester.edu/news/show.php?id=2993
  
• http://www.space.com/scienceastronomy/071001_mm_planet_embryos.html

See Also

• Aliases: Gliese 803 System, HD 197481 System, and CD-31°17815 System, AU Microscopii System, AT Microscopii System, Gliese 799 System, HD 196982 System, CD-31°16135 System
• Nearest Orange Dwarf Star: CD-27°14659 System
• Beta Pictoris Moving Group