Published June 10, 2013 | Version v1
Journal article Metadata-only

X-RAY DISCOVERY OF A DWARF-GALAXY-GALAXY COLLISION

Creators

  • 1. Huntingdon Institute for X-ray Astronomy, LLC, 10677 Franks Road, Huntingdon, PA 16652 (United States)

Description

We report the discovery of a probable dwarf galaxy colliding with NGC 1232. This collision is visible only in the X-ray spectral band, and it is creating a region of shocked gas with a temperature of 5.8 MK covering an impact area 7.25 kpc in diameter. The X-ray luminosity is 3.7 × 1038 erg s–1. The long lifetime of this gas against radiative and adiabatic cooling should permit the use of the luminous afterglow from such collisions to be used as a way of estimating their importance in galaxy evolution.

Availability note (English)

Available from http://dx.doi.org/10.1088/0004-637X/770/1/17

Additional details

Identifiers

DOI
10.1088/0004-637X/770/1/17;

Publishing Information

Journal Title
Astrophysical Journal
Journal Volume
770
Journal Issue
1
Journal Page Range
[5 p.]
ISSN
0004-637X
CODEN
ASJOAB

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
44082253
Subject category
S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
Descriptors DEI
AFTERGLOW; COLLISIONS; GALACTIC EVOLUTION; LUMINOSITY; X RADIATION; X-RAY GALAXIES
Descriptors DEC
COSMIC RAY SOURCES; COSMIC X-RAY SOURCES; ELECTROMAGNETIC RADIATION; EVOLUTION; GALAXIES; IONIZING RADIATIONS; OPTICAL PROPERTIES; PHYSICAL PROPERTIES; RADIATIONS