Archive for the ‘M4’ Category

M4: Chandra locates X-ray sources and binaries

July 17, 2008

[M4 in X-rays, CXO]

Globular clusters M4 and NGC 6397 have got their central parts imaged by Chandra X-ray Observatory, among a total of 13 Milky Way Globular Clusters. Astronomers found that contrary to expectation, denser M4, with its higher rate of stellar encounters, has less binaries and hot X-ray sources than less dense NGC 6397.

Credit: NASA/CXC/Northwestern Univ/John Fregeau

Chandra image:
http://chandra.harvard.edu/photo/2008/gclust/

Chandra Press Release (April 28, 2008):
http://chandra.harvard.edu/press/08_releases/press_042808.html

SEDS M4 page:
http://www.seds.org/messier/m/m004.html

Recent Images and News of Messier Objects

July 15, 2008

M4 (and NGC 6397) from Chandra; April 28, 2008:
http://chandra.harvard.edu/photo/2008/gclust/

M31 and M101 by Galex, February 21, 2008:
http://www.galex.caltech.edu/newsroom/glx2008-01f.html

M81 from Chandra; June 18, 2008:
http://chandra.harvard.edu/photo/2008/m81/

M81 group (in particular, Arp’s Loop), from Hubble; January 8, 2008:
http://hubblesite.org/newscenter/archive/releases/2008/02/

M81 group with radio clouds, from NRAO; January 10, 2008:
http://www.nrao.edu/pr/2008/m81clouds/

M82 in X-rays by XMM Newton:
http://xmm.esac.esa.int/external/xmm_science/gallery/public/level3.php?id=1004

M83 by Galex; April 16, 2008:
http://www.galex.caltech.edu/newsroom/glx2008-01r.html

M106 by Galex; April 28, 2008:
http://www.galex.caltech.edu/newsroom/glx2008-02f.html

Various THINGS galaxies, including M51, M63, M74, M81 and several M81 group dwarfs, by NRAO; January 10, 2008:
http://www.nrao.edu/pr/2008/things/