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VLT/MUSE illuminates possible channels for Lyman continuum escape in the halo of SBS 0335-52E
Stockholm University, Faculty of Science, Department of Astronomy.
Stockholm University, Faculty of Science, Department of Astronomy.
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Number of Authors: 72017 (English)In: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 606, article id L11Article in journal (Refereed) Published
Abstract [en]

We report on the discovery of ionised gas filaments in the circum-galactic halo of the extremely metal-poor compact starburst SBS 0335-052E in a 1.5 h integration with the MUSE integral-field spectrograph. We detect these features in H alpha and [O III] emission down to a limiting surface-brightness of 5 x 10(-19) erg s(-1) cm(-2) arcsec(-2). The filaments have projected diameters of 2.1 kpc and extend more than 9 kpc to the north and north-west from the main stellar body. We also detect extended nebular He II lambda 4686 emission that brightens towards the north-west at the rim of a starburst driven super-shell. We also present a velocity field of the ionised gas. The filaments appear to connect seamlessly in velocity space to the kinematical disturbances caused by the shell. Similar to high-z starforming galaxies, the ionised gas in this galaxy is dispersion dominated. We argue that the filaments were created via feedback from the starburst and that these ionised structures in the halo may act as escape channels for Lyman continuum radiation in this gas-rich system.

Place, publisher, year, edition, pages
2017. Vol. 606, article id L11
Keywords [en]
galaxies: starburst, galaxies: halos, galaxies: individual: SBS 0335-052E, techniques: imaging spectroscopy
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:su:diva-148986DOI: 10.1051/0004-6361/201731809ISI: 000413565200001OAI: oai:DiVA.org:su-148986DiVA, id: diva2:1161543
Available from: 2017-11-30 Created: 2017-11-30 Last updated: 2017-11-30Bibliographically approved

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Herenz, Edmund ChristianHayes, MatthewBik, AdrianusMelinder, JensÖstlin, Göran
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