dc.date.accessioned | 2018-02-18T11:52:41Z | |
dc.date.available | 2018-02-18T11:52:41Z | |
dc.date.created | 2017-02-04T12:02:53Z | |
dc.date.issued | 2017 | |
dc.identifier.citation | Vanzella, E. Balestra, I. Gronke, Max Balthasar Karman, W. Caminha, G. B. Dijkstra, Mark Rosati, P. De Barros, S. Caputi, K. Grillo, C. Tozzi, P. Meneghetti, M. Mercurio, A. Gilli, R. . Illuminating gas inflows/outflows in the MUSE deepest fields: Lyα nebulae around forming galaxies at z ≃ 3.3. Monthly notices of the Royal Astronomical Society. 2017, 465(4), 3803-3816 | |
dc.identifier.uri | http://hdl.handle.net/10852/60243 | |
dc.description.abstract | We report the identification of extended Lyα nebulae at z ≃ 3.3 in the Hubble Ultra Deep Field (HUDF, ≃40 kpc × 80 kpc) and behind the Hubble Frontier Field galaxy cluster MACSJ0416 (≃40 kpc), spatially associated with groups of star-forming galaxies. VLT/MUSE integral field spectroscopy reveals a complex structure with a spatially varying double-peaked Lyα emission. Overall, the spectral profiles of the two Lyα nebulae are remarkably similar, both showing a prominent blue emission, more intense and slightly broader than the red peak. From the first nebula, located in the HUDF, no X-ray emission has been detected, disfavouring the possible presence of active galactic nuclei. Spectroscopic redshifts have been derived for 11 galaxies within 2 arcsec from the nebula and spanning the redshift range 1.037 < z < 5.97. The second nebula, behind MACSJ0416, shows three aligned star-forming galaxies plausibly associated with the emitting gas. In both systems, the associated galaxies reveal possible intense rest-frame-optical nebular emissions lines [O iii] λλ4959, 5007+Hβ with equivalent widths as high as 1500 Å rest frame and star formation rates ranging from a few to tens of solar masses per year. A possible scenario is that of a group of young, star-forming galaxies emitting ionizing radiation that induces Lyα fluorescence, therefore revealing the kinematics of the surrounding gas. Also Lyα powered by star formation and/or cooling radiation may resemble the double-peaked spectral properties and the morphology observed here. If the intense blue emission is associated with inflowing gas, then we may be witnessing an early phase of galaxy or a proto-cluster (or group) formation.
© 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society | en_US |
dc.language | EN | |
dc.language.iso | en | en_US |
dc.publisher | Blackwell Publishing | |
dc.title | Illuminating gas inflows/outflows in the MUSE deepest fields: Lyα nebulae around forming galaxies at z ≃ 3.3 | en_US |
dc.type | Journal article | en_US |
dc.creator.author | Vanzella, E. | |
dc.creator.author | Balestra, I. | |
dc.creator.author | Gronke, Max Balthasar | |
dc.creator.author | Karman, W. | |
dc.creator.author | Caminha, G. B. | |
dc.creator.author | Dijkstra, Mark | |
dc.creator.author | Rosati, P. | |
dc.creator.author | De Barros, S. | |
dc.creator.author | Caputi, K. | |
dc.creator.author | Grillo, C. | |
dc.creator.author | Tozzi, P. | |
dc.creator.author | Meneghetti, M. | |
dc.creator.author | Mercurio, A. | |
dc.creator.author | Gilli, R. | |
cristin.unitcode | 185,15,3,0 | |
cristin.unitname | Institutt for teoretisk astrofysikk | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |
dc.identifier.cristin | 1446951 | |
dc.identifier.bibliographiccitation | info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Monthly notices of the Royal Astronomical Society&rft.volume=465&rft.spage=3803&rft.date=2017 | |
dc.identifier.jtitle | Monthly notices of the Royal Astronomical Society | |
dc.identifier.volume | 465 | |
dc.identifier.issue | 4 | |
dc.identifier.startpage | 3803 | |
dc.identifier.endpage | 3816 | |
dc.identifier.doi | http://dx.doi.org/10.1093/mnras/stw2442 | |
dc.identifier.urn | URN:NBN:no-62880 | |
dc.type.document | Tidsskriftartikkel | en_US |
dc.type.peerreviewed | Peer reviewed | |
dc.source.issn | 0035-8711 | |
dc.identifier.fulltext | Fulltext https://www.duo.uio.no/bitstream/handle/10852/60243/1/stw2442.pdf | |
dc.type.version | PublishedVersion | |