Star Formation - Images of Various Stages        Return to Unit 4 Assignments

1. Molecular cloud (Banard 68) - a Bok globule (aka Thackeray globules)
http://www.eso.org/outreach/press-rel/pr-1999/phot-29b-99-normal.jpg - blue through near-IR images of B 68
http://www.eso.org/outreach/press-rel/pr-1999/phot-29c-99-normal.jpg - iso-extinction map of Barnard 68
http://aanda.u-strasbg.fr:2002/articles/aa/full/2003/09/aael211/img15.gif - sub millimeter contour of B. 68
http://antwrp.gsfc.nasa.gov/apod/ap950911.html Proplyds in Orion, the next phase after Bok globule contraction

2. Dusty disks, visible and IR, with jets
http://imgsrc.hubblesite.org/hu/db/1995/24/images/a/formats/web_print.jpg some HH objects - visible light
http://antwrp.gsfc.nasa.gov/apod/ap020607.html dusty disk stage star - infrared
http://antwrp.gsfc.nasa.gov/apod/ap961207.html Dust disks now forming planetary systems in Orion - visible light image

3. T Tauri stars
http://www.ifa.hawaii.edu/ao/images/TTauri/TTauri.html T Tauri stars in near-infrared from U. of H., using adaptive optics to eliminate effects due to atmospheric turbulence. Protostars are clearing out dust and gas, as well as getting rid of angular momentum via strong solar winds.

4. Three very young stars, showing residual dust even though fusion is now on. Sub-mm radiation from dust actually shows mass distribution of the dust.
http://antwrp.gsfc.nasa.gov/apod/ap980423.html

5. X-ray image (also infrared, optical, and radio) of star forming region M17 in Orion, showing X-radiation from gas heated by UV from hot young stars. Scroll to number 5 image at bottom to see comparison of X-ray image with optical light image.
http://chandra.harvard.edu/photo/2003/m17/more.html

6. Putting it all together, here is a multi-wavelength overlaid picture of a famous star-forming region in the Large Magellanic cloud, a galaxy only 160,000 light years distant from our solar system.
http://antwrp.gsfc.nasa.gov/apod/ap971224.html