The dust morphology of the elliptical Galaxy M 86 with SPIRE
Elbaz, D.; Bock, J. J.; Clements, D. L.; Ciesla, L.; Okumura, K.; Buat, V.; Dwek, E.; Roussel, H.; Cooray, A.; Isaak, K. G.; Page, M. J.; Symeonidis, M.; Vaccari, M.; Galliano, F.; Cormier, D.; Hony, S.; Sauvage, M.; Galametz, M.; Wilson, C. D.; Auld, R.; Baes, M.; Bradford, M.; Eales, S.; Panuzzo, P.; Bendo, G. J.; Boselli, A.; Cortese, L.; di Serego Alighieri, S.; Chanial, P.; Glenn, J.; Griffin, M.; Lu, N.; Madden, S.; O'Halloran, B.; Papageorgiou, A.; Pohlen, M.; Schulz, B.; Stevens, J. A.; Trichas, M.; Vigroux, L.; Spinoglio, L.; Smith, M. W. L.; Gomez, H. L.; Gear, W. K.; Barlow, M. J.; Charlot, S.; Rangwala, N.; Oliver, S.; Rigby, E. E.; Wright, G. S.; Zeilinger, W. W.; Parkin, T. J.; Perez-Fournon, I.; Castro-Rodriguez, N.; Srinivasan, S.; Davies, J. I.; Schirm, M. R. P.; Rykala, A.; Sacchi, N.; Levenson, L. R.; Wozniak, H.
United Kingdom, Belgium, France, Italy, United States, Spain, Netherlands, Canada, Austria
Abstract
We present Herschel-SPIRE observations at 250-500 μm of the giant elliptical galaxy M 86 and examine the distribution of the resolved cold dust emission and its relation with other galactic tracers. The SPIRE images reveal three dust components: emission from the central region; a dust lane extending north-south; and a bright emission feature 10 kpc to the south-east. We estimate that ~106 M_⊙ of dust is spatially coincident with atomic and ionized hydrogen, originating from stripped material from the nearby spiral NGC 4438 due to recent tidal interactions with M 86. The gas-to-dust ratio of the cold gas component ranges from ~20-80. We discuss the different heating mechanisms for the dust features.
Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA.