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  1. OA@INAF
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  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
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Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/27986
Title: Alone on a wide wide sea. The origin of SECCO 1, an isolated star-forming gas cloud in the Virgo cluster*†‡
Authors: BELLAZZINI, Michele 
Armillotta, L.
Perina, S.
MAGRINI, LAURA 
CRESCI, GIOVANNI 
Beccari, G.
Battaglia, G.
Fraternali, F.
de Zeeuw, P. T.
Martin, N. F.
CALURA, Francesco 
Ibata, R.
Coccato, L.
TESTA, Vincenzo 
Correnti, M.
Issue Date: 2018
Journal: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 
Number: 476
Issue: 4
First Page: 4565
Abstract: SECCO 1 is an extremely dark, low-mass (M<SUB>⋆</SUB> ≃ 10<SUP>5</SUP> M<SUB>☉</SUB>), star-forming stellar system lying in the low-velocity cloud (LVC) substructure of the Virgo cluster of galaxies, and hosting several H II regions. Here, we review our knowledge of this remarkable system, and present the results of (a) additional analysis of our panoramic spectroscopic observations with MUSE, (b) the combined analysis of Hubble Space Telescope and MUSE data, and (c) new narrow-band observations obtained with OSIRIS@GTC to search for additional H II regions in the surroundings of the system. We provide new evidence supporting an age as young as ≲ 4 Myr for the stars that are currently ionizing the gas in SECCO 1. We identify only one new promising candidate H II region possibly associated with SECCO 1, thus confirming the extreme isolation of the system. We also identify three additional candidate pressure-supported dark clouds in Virgo among the targets of the SECCO survey. Various possible hypotheses for the nature and origin of SECCO 1 are considered and discussed, also with the help of dedicated hydrodynamical simulations showing that a hydrogen cloud with the characteristics of SECCO 1 can likely survive for ≳ 1 Gyr while travelling within the LVC Intra Cluster Medium.
URI: http://hdl.handle.net/20.500.12386/27986
URL: https://academic.oup.com/mnras/article-abstract/476/4/4565/4898074?redirectedFrom=fulltext
ISSN: 0035-8711
DOI: 10.1093/mnras/sty467
Bibcode ADS: 2018MNRAS.476.4565B
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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