Archive for the ‘M82’ Category

M81 and its group: New images

July 24, 2008

[M81 composite, CXO/HST/SST/GALEX]

This composite NASA image of the spiral galaxy M81, located about 12 million light years away, includes X-ray data from the Chandra X-ray Observatory (blue), optical data from the Hubble Space Telescope (green), infrared data from the Spitzer Space Telescope (pink) and ultraviolet data from GALEX (purple). The inset shows a close-up of the Chandra image. The object at the center of M81 is considered to be a supermassive black hole that is about 70 million times more massive than the Sun.

Credit: X-ray: NASA/CXC/Wisconsin/D.Pooley & CfA/A.Zezas; Optical: NASA/ESA/CfA/A.Zezas; UV: NASA/JPL-Caltech/CfA/J.Huchra et al.; IR: NASA/JPL-Caltech/CfA

Chandra Press Release, June 18, 2008:

[M81 group, HST]

Nasa’s Hubble Space Telescope, as well as GALEX, were used to obtain deep images from the M81 group, and imaged a number of faint blue blobs, actually large young star clusters. These are aligned along bridges of matter between the galaxies M81, M82 and NGC 3077, and nicknamed Arp¬ís Loop.

Credit: NASA, ESA, and D. de Mello (Catholic University of America/GSFC)

STScI Press Release, January 8, 2008:

[M81 group, VLA]

Radio astronomers using the NRAO’s Very Large Array (VLA) of radi antennae have found a number of faint, hitherto unknown hydrogen clouds
in the M81 group.

NRAO Press Release, January 10, 2008:

SEDS M81 page:


M82: X-ray view by XMM-Newton

July 24, 2008

[M82 in X-rays, XMM-Newton]

M82 was captured in X-rays by a telesope on ESA’s XMM-Newton satellite, featuring its powerful outflow. M82 is actively forming stars, and exhibits a several kpc large outflow, made up of very hot gas produced by supernova explosions. The image has been produced from EPIC data; the colours indicate the energy of the X-rays (red: 0.4-1 keV; green: 1-2 keV; blue: 2-8 keV). The central regions of the galaxy appear blueish because of heavy absorption.

Credit: P. Ranalli, A. Comastri, L. Origlia, R. Maiolino and ESA.

XMM Newton image:

SEDS M82 page:

Recent Images and News of Messier Objects

July 15, 2008

M4 (and NGC 6397) from Chandra; April 28, 2008:

M31 and M101 by Galex, February 21, 2008:

M81 from Chandra; June 18, 2008:

M81 group (in particular, Arp’s Loop), from Hubble; January 8, 2008:

M81 group with radio clouds, from NRAO; January 10, 2008:

M82 in X-rays by XMM Newton:

M83 by Galex; April 16, 2008:

M106 by Galex; April 28, 2008:

Various THINGS galaxies, including M51, M63, M74, M81 and several M81 group dwarfs, by NRAO; January 10, 2008: