Passive early-type galaxies (ETGs) provide an ideal laboratory for studying the interplay between dust formation around evolved stars and its subsequent destruction in a hot gas. Using Spitzer-IRS and Herschel data we compare the dust production rate in the envelopes of evolved AGB stars with a constraint on the total dust mass. Early-type galaxies which appear to be truly passively evolving are not detected by Herschel. We thus derive a distance independent upper limit to the dust grain survival time in the hostile environment of ETGs of <46±25 Myr for amorphous silicate grains. This implies that ETGs which are detected at far-infrared wavelengths have acquired a cool dusty medium via interaction. Given likely time-scales for ram-pressure stripping, this also implies that only galaxies with dust in a cool (atomic) medium can release dust into the intra-cluster medium. © ESO 2010.
Clemens, M.S., Jones, A.P., Bressan, A., Baes, M., Bendo, G.J., Bianchi, S., et al. (2010). The Herschel Virgo Cluster Survey. III. A constraint on dust grain lifetime in early-type galaxies. ASTRONOMY & ASTROPHYSICS, 518, L50-L50.
Citazione: | Clemens, M.S., Jones, A.P., Bressan, A., Baes, M., Bendo, G.J., Bianchi, S., et al. (2010). The Herschel Virgo Cluster Survey. III. A constraint on dust grain lifetime in early-type galaxies. ASTRONOMY & ASTROPHYSICS, 518, L50-L50. |
Tipo: | Articolo in rivista - Articolo scientifico |
Carattere della pubblicazione: | Scientifica |
Titolo: | The Herschel Virgo Cluster Survey. III. A constraint on dust grain lifetime in early-type galaxies |
Autori: | Clemens, MS; Jones, AP; Bressan, A; Baes, M; Bendo, GJ; Bianchi, S; Bomans, DJ; Boselli, A; Corbelli, E; Cortese, L; Dariush, A; Davies, JI; De Looze, I; di Serego Alighieri, S; Fadda, D; Fritz, J; Garcia-Appadoo, DA; Gavazzi, G; Giovanardi, C; Grossi, M; Hughes, TM; Hunt, LK; Madden, S; Pierini, D; Pohlen, M; Sabatini, S; Smith, MWL; Verstappen, J; Vlahakis, C; Xilouris, EM; Zibetti, S |
Autori: | |
Data di pubblicazione: | 2010 |
Lingua: | English |
Rivista: | ASTRONOMY & ASTROPHYSICS |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1051/0004-6361/201014533 |
Appare nelle tipologie: | 01 - Articolo su rivista |