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EnglishPassive 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.
The Herschel Virgo Cluster Survey. III. A constraint on dust grain lifetime in early-type galaxies / Clemens, M. S.; Jones, A. P.; Bressan, A.; Baes, M.; Bendo, G. J.; Bianchi, S.; Bomans, D. J.; Boselli, A.; Corbelli, E.; Cortese, L.; Dariush, A.; Davies, J. I.; De Looze, I.; Alighieri, S. di Serego; Fadda, D.; Fritz, J.; Garcia-Appadoo, D. A.; Gavazzi, G.; Giovanardi, C.; Grossi, M.; Hughes, T. M.; Hunt, L. K.; Madden, S.; Pierini, D.; Pohlen, M.; Sabatini, S.; Smith, M. W. L.; Verstappen, J.; Vlahakis, C.; Xilouris, E. M.; Zibetti, S.. - In: ASTRONOMY & ASTROPHYSICS. - ISSN 0004-6361. - 518(2010), pp. 1-4.
| Titolo: | The Herschel Virgo Cluster Survey. III. A constraint on dust grain lifetime in early-type galaxies |
| Autori: | Clemens, M. S.; Jones, A. P.; Bressan, A.; Baes, M.; Bendo, G. J.; Bianchi, S.; Bomans, D. J.; Boselli, A.; Corbelli, E.; Cortese, L.; Dariush, A.; Davies, J. I.; De Looze, I.; Alighieri, S. di Serego; Fadda, D.; Fritz, J.; Garcia-Appadoo, D. A.; Gavazzi, G.; Giovanardi, C.; Grossi, M.; Hughes, T. M.; Hunt, L. K.; Madden, S.; Pierini, D.; Pohlen, M.; Sabatini, S.; Smith, M. W. L.; Verstappen, J.; Vlahakis, C.; Xilouris, E. M.; Zibetti, S. |
| Rivista: | |
| Data di pubblicazione: | 2010 |
| Volume: | 518 |
| Pagina iniziale: | 1 |
| Pagina finale: | 4 |
| Numero di Articolo: | L50 |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1051/0004-6361/201014533 |
| URL: | https://arxiv.org/abs/1005.3056 |
| Appare nelle tipologie: | 1.1 Journal article |
File in questo prodotto:
| File | Descrizione | Tipologia | Licenza | |
|---|---|---|---|---|
| aa14533-10.pdf | Versione Editoriale (PDF) | Non specificato | Open Access Visualizza/Apri |
http://hdl.handle.net/20.500.11767/16725
