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VCC 2062: an old Tidal Dwarf Galaxy in the Virgo Cluster?
Pierre-Alain Duc, Jonathan Braine, Ute Lisenfeld +2
Numerical simulations predict the existence of old Tidal Dwarf Galaxies (TDGs) that would have survived several Gyr after the collision lying at their origin. Such survivors, which…
Free-Floating HI Clouds in the M 81 Group
Elias Brinks, Fabian Walter, Evan D. Skillman
Recent VLA observations pointed at dwarf spheroidal (dSph) galaxies in the M 81 group reveal a hitherto hidden population of extremely low mass (~1e5 Msol) HI clouds with no obviou…
Star Formation in NGC 5194 (M51a). II. The Spatially-Resolved Star Formation Law
Robert C. Kennicutt, Daniela Calzetti, Fabian Walter +20
We have studied the relationship between the star formation rate (SFR) surface density and gas surface density in the spiral galaxy M51a (NGC 5194), using multi-wavelength data obt…
Tidal Debris posing as Dark Galaxies
Pierre-Alain Duc, Frederic Bournaud, Elias Brinks
Debris sent into the intergalactic medium during tidal collisions can tell us about several fundamental properties of galaxies, in particular their missing mass, both in the form o…
Missing Mass in Collisional Debris from Galaxies
F. Bournaud, P. -A. Duc, E. Brinks +6
Recycled dwarf galaxies can form in the collisional debris of massive galaxies. Theoretical models predict that, contrary to classical galaxies, they should be free of non-baryonic…
Dust and Atomic Gas in Dwarf Irregular Galaxies of the M81 Group: The SINGS and THINGS view
F. Walter, J. Cannon, H. Roussel +22
[abridged] We present observations of the dust and atomic gas phase in seven dwarf irregular galaxies of the M81 group from the SINGS and THINGS surveys. The Spitzer observations p…