Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/29887
Titolo: | Star formation inside a galactic outflow | Autori: | Maiolino, R. Russell, H. R. Fabian, A. C. Carniani, S. Gallagher, R. Cazzoli, S. Arribas, S. BELFIORE, FRANCESCO MICHEL CONCETTO Bellocchi, E. Colina, L. CRESCI, GIOVANNI Ishibashi, W. Marconi, Alessandro MANNUCCI, FILIPPO OLIVA, Ernesto Sturm, E. |
Data pubblicazione: | 2017 | Rivista: | NATURE | Numero: | 544 | Fascicolo: | 7649 | Da pagina:: | 202 | Abstract: | Recent observations have revealed massive galactic molecular outflows that may have the physical conditions (high gas densities) required to form stars. Indeed, several recent models predict that such massive outflows may ignite star formation within the outflow itself. This star-formation mode, in which stars form with high radial velocities, could contribute to the morphological evolution of galaxies, to the evolution in size and velocity dispersion of the spheroidal component of galaxies, and would contribute to the population of high-velocity stars, which could even escape the galaxy. Such star formation could provide in situ chemical enrichment of the circumgalactic and intergalactic medium (through supernova explosions of young stars on large orbits), and some models also predict it to contribute substantially to the star-formation rate observed in distant galaxies. Although there exists observational evidence for star formation triggered by outflows or jets into their host galaxy, as a consequence of gas compression, evidence for star formation occurring within galactic outflows is still missing. Here we report spectroscopic observations that unambiguously reveal star formation occurring in a galactic outflow at a redshift of 0.0448. The inferred star-formation rate in the outflow is larger than 15 solar masses per year. Star formation may also be occurring in other galactic outflows, but may have been missed by previous observations owing to the lack of adequate diagnostics. | URI: | http://hdl.handle.net/20.500.12386/29887 | URL: | http://arxiv.org/abs/1703.08587v1 https://www.nature.com/articles/nature21677 |
ISSN: | 0028-0836 | DOI: | 10.1038/nature21677 | Bibcode ADS: | 2017Natur.544..202M | Fulltext: | open |
È visualizzato nelle collezioni: | 1.01 Articoli in rivista |
File in questo documento:
File | Descrizione | Dimensioni | Formato | |
---|---|---|---|---|
1703.08587.pdf | preprint | 6.55 MB | Adobe PDF | Visualizza/apri |
nature21677.pdf | [Administrators only] | 1.56 MB | Adobe PDF |
Page view(s)
60
controllato il 28-mar-2024
Download(s)
13
controllato il 28-mar-2024
Google ScholarTM
Check
Altmetric
Altmetric
Tutti i documenti in DSpace sono pubblicati ad Accesso Aperto, salvo diversa indicazione per alcuni documenti specifici.