C. W. Engelbracht et al 2006 ApJ 642 L127 doi:10.1086/504590
C. W. Engelbracht1, P. Kundurthy1, K. D. Gordon1, G. H. Rieke1, R. C. Kennicutt1,2, J.-D. T. Smith1, M. W. Regan3, D. Makovoz4, M. Sosey3, B. T. Draine5, G. Helou4, L. Armus4, D. Calzetti3, M. Meyer3, G. J. Bendo6, F. Walter7, D. Hollenbach8, J. M. Cannon7, E. J. Murphy9, D. A. Dale10, B. A. Buckalew4 and K. Sheth4
Show affiliationsWe present new images (ground-based optical and mid-infrared [MIR] from the Spitzer Space Telescope) and spectra (from Spitzer) of the archetypal starburst galaxy M82. The Spitzer data show that the MIR emission extends at least 6 kpc along the minor axis of the galaxy. We use the optical and infrared data to demonstrate that the extended emission is dominated by emission from dust. The colors of the MIR emission and the spectra indicate that there is a strong component of aromatic feature emission (the MIR features commonly attributed to polycyclic aromatic hydrocarbons). The dust continuum and aromatic feature emission are both strong in the well-known superwind region of this galaxy; clearly, the carrier of the aromatic features can survive in close proximity to the wind, far from the plane of the galaxy. We also see significant emission by dust well outside the superwind region, providing the clearest picture to date of the dust distribution in the halo of this galaxy.
dust, extinction; galaxies: individual (M82); galaxies: ISM; galaxies: peculiar; galaxies: starburst
Issue 2 (2006 May 10)
Received 2006 February 2, accepted for publication 2006 March 27
Published 2006 April 17
C. W. Engelbracht et al 2006 ApJ 642 L127
Daniel R. Weisz et al. 2008 ApJ 689 160
George J. Bendo et al. 2006 ApJ 645 134
D. A. Dale et al. 2005 ApJ 633 857
John M. Cannon et al. 2005 ApJ 618 247
V. Cvetkovic et al 2008 EPL 81 27001
E. J. Murphy et al. 2006 ApJ 638 157
Adam Leroy et al. 2007 ApJ 663 990
D. A. Dale et al. 2007 ApJ 655 863
John M. Cannon and Evan D. Skillman 2004 ApJ 610 772