The frequency and properties of young tidal dwarf galaxies in nearby groups.

Authors :: Lee-Waddell, K.
Spekkens, K.
Chandra, P.
Patra, N.
Cuillandre, J.-C.
Wang, J.
Haynes, M. P.
Cannon, J.
Stierwalt, S.
Sick, J.
Giovanelli, R.
Gil de Paz, Armando
Knapen, Johan H.
Lee, Janice C.
Source :: Proceedings of the International Astronomical Union; 2016 Supplement S321, Vol. 11, p238-240, 3p
Publication Year :: 2016
Abstract: We present the results of a multi-wavelength investigation of the dwarf galaxy populations in three interacting galaxy groups: NGC 871/6/7, NGC 3166/9, NGC 4725/47. Using degree-scale Giant Metrewave Radio Telescope Hi mosaics and deep optical photometry from the Canada-France-Hawaii Telescope, we measured the Hi and stellar properties of the gas-rich low-mass group members to classify each one as a classical dwarf galaxy, a short-lived tidal knot or a tidal dwarf galaxy (TDG). Our observations detect several dwarf irregulars and various tidal knots. We identify four potentially long-lived tidal objects in the three groups, implying that TDGs are not readily produced. The tidal objects examined in this small survey also appear to have a wider variety of properties than TDGs formed in current simulations. [ABSTRACT FROM PUBLISHER]