dc.creator | Bassett, R. | |
dc.creator | Ryan-Weber, E.V. | |
dc.creator | Cooke, J. | |
dc.creator | Diaz, Carlos Gonzalo | |
dc.creator | Nanayakkara, T. | |
dc.creator | Yuan, T. T. | |
dc.creator | Spitler, L.R. | |
dc.creator | Mestric, U. | |
dc.creator | Garel, T. | |
dc.creator | Sawicki, Silvana Mabel | |
dc.creator | Gwyn, S. | |
dc.creator | Golob, A. | |
dc.date.accessioned | 2021-02-01T21:24:26Z | |
dc.date.accessioned | 2022-10-15T10:33:30Z | |
dc.date.available | 2021-02-01T21:24:26Z | |
dc.date.available | 2022-10-15T10:33:30Z | |
dc.date.created | 2021-02-01T21:24:26Z | |
dc.date.issued | 2019-03 | |
dc.identifier | Bassett, R.; Ryan-Weber, E.V.; Cooke, J.; Diaz, Carlos Gonzalo; Nanayakkara, T.; et al.; On the lack of correlation between [O III ]/[O II ] and Lyman continuum escape fraction; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 483; 4; 3-2019; 5223-5245 | |
dc.identifier | 0035-8711 | |
dc.identifier | http://hdl.handle.net/11336/124436 | |
dc.identifier | CONICET Digital | |
dc.identifier | CONICET | |
dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/4376081 | |
dc.description.abstract | We present the first results of our pilot study of eight photometrically selected Lyman-continuum (LyC) emitting galaxy candidates from the COSMOS field and focus on their optical emission line ratios. Observations were performed in the H and K bands using the Multi-Object Spectrometer for Infra-Red Exploration (MOSFIRE) instrument at the Keck Observatory, targeting the [O ii], H β, and [Oiii] emission lines. We find that photometrically selected LyC emitting galaxy candidates have high ionization parameters, based on their high [O iii]/[O ii] ratios (O32), with an average ratio for our sample of 2.5 ± 0.2. Preliminary results of our companion Low-Resolution Imaging Spectrometer (LRIS) observations, targeting LyC and Ly α, show that those galaxies with the largest O32 are typically found to also be Ly α emitters. High O32 galaxies are also found to have tentative non-zero LyC escape fractions (f esc (LyC)) based on u band photometric detections. These results are consistent with samples of highly ionized galaxies, including confirmed LyC emitting galaxies from the literature. We also perform a detailed comparison between the observed emission line ratios and simulated line ratios from density bounded H ii regions modelled using the photoionization code MAPPINGS V. Estimates of f esc (LyC) for our sample fall in the range from 0.0 to 0.23 and suggest possible tension with published correlations between O32 and f esc (LyC), adding weight to dichotomy of arguments in the literature. We highlight the possible effects of clumpy geometry and mergers that may account for such tension. | |
dc.language | eng | |
dc.publisher | Wiley Blackwell Publishing, Inc | |
dc.relation | info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1093/mnras/sty3320 | |
dc.relation | info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article/483/4/5223/5237720 | |
dc.relation | info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/1812.04129 | |
dc.rights | https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ | |
dc.rights | info:eu-repo/semantics/openAccess | |
dc.subject | COSMOLOGY: DARK AGES, REIONIZATION, FIRST STARS | |
dc.subject | GALAXIES: INTERGALACTIC MEDIUM | |
dc.subject | GALAXIES: ISM | |
dc.title | On the lack of correlation between [O III ]/[O II ] and Lyman continuum escape fraction | |
dc.type | info:eu-repo/semantics/article | |
dc.type | info:ar-repo/semantics/artículo | |
dc.type | info:eu-repo/semantics/publishedVersion | |