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Title: An ionized superbubble powered by a protocluster at z = 6.5
Author: Rodríguez Espinosa, José Miguel
Mas-Hesse, José Miguel
Salvador Solé, Eduard
Calvi, R.
Manrique Oliva, Alberto
Chanchaiworawit, K.
Guzmán, Rafael
Gallego, Jesús
Herrero, Artemio
Marín Franch, Antonio
Keywords: Galàxies
Formació d'estels
Formació de les galàxies
Star formation
Galaxy formation
Issue Date: 18-Mar-2020
Publisher: Royal Astronomical Society
Abstract: We show herein that a proto-cluster of Ly α emitting galaxies, spectroscopically confirmed at redshift 6.5, produces a remarkable number of ionizing continuum photons. We start from the Ly α fluxes measured in the spectra of the sources detected spectroscopically. From these fluxes, we derive the ionizing emissivity of continuum photons of the protocluster, which we compare with the ionizing emissivity required to reionize the protocluster volume. We find that the sources in the protocluster are capable of ionizing a large bubble, indeed larger than the volume occupied by the protocluster. For various calculations, we have used the model AMIGA, in particular to derive the emissivity of the Lyman continuum photons required to maintain the observed volume ionized. Besides, we have assumed the ionizing photons escape fraction given by AMIGA at this redshift.
Note: Reproducció del document publicat a:
It is part of: Monthly Notices of the Royal Astronomical Society: Letters, 2020, vol. 495, num. 1, p. L17-L21
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ISSN: 1745-3933
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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