What evidence do we have that the disks of gas and dust are common among young stars?

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What evidence do we have that the disks of gas and dust are common among young stars?

2007-10-14 12:06:07 · 2 answers · asked by greeneyeglitter 1 in Science & Mathematics ➔ Astronomy & Space

2 answers

planets?
http://www.ifa.hawaii.edu/info/press-releases/Liu0804.html
http://mr.caltech.edu/media/lead/080597AIS.html
http://www.spitzer.caltech.edu/Media/releases/ssc2007-14/release.shtml

2007-10-14 12:26:56 · answer #1 · answered by Mercury 2010 7 · 0⤊ 0⤋

Disks of gas and dust give the star an infrared excess - it's brighter in the infrared than the optical because the dust blocks optical light from leaving while letting infrared through. If it were lacking the dust, we would see an optical excess instead.

2007-10-14 13:44:35 · answer #2 · answered by eri 7 · 0⤊ 0⤋