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Physical Sciences and Mathematics Commons

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Astrophysics and Astronomy

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University of Massachusetts Amherst

2011

Galaxies: distances and redshifts

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Full-Text Articles in Physical Sciences and Mathematics

On The Detection Of Ionizing Radiation Arising From Star-Forming Galaxies At Redshift Z ~ 3-4 : Looking For Analogs Of "Stellar Reionizers", Eros Vanzella, Yicheng Guo, Mauro Giavalisco, Andrea Grazian, Marco Castellano, Stefano Cristiani, Mark Dickinson, Adriano Fontana, Mario Nonino, Emanuele Giallongo, Laura Pentericci, Audrey Galametz, S. M. Faber, Henry C. Ferguson, Norman A. Grogin, Anton M. Koekemoer, Jeffrey Newman, Brian D. Siana Jan 2011

On The Detection Of Ionizing Radiation Arising From Star-Forming Galaxies At Redshift Z ~ 3-4 : Looking For Analogs Of "Stellar Reionizers", Eros Vanzella, Yicheng Guo, Mauro Giavalisco, Andrea Grazian, Marco Castellano, Stefano Cristiani, Mark Dickinson, Adriano Fontana, Mario Nonino, Emanuele Giallongo, Laura Pentericci, Audrey Galametz, S. M. Faber, Henry C. Ferguson, Norman A. Grogin, Anton M. Koekemoer, Jeffrey Newman, Brian D. Siana

Mauro Giavalisco

We use the spatially-resolved, multi-band photometry in the GOODS South field acquired by the CANDELS project to constrain the nature of candidate Lyman continuum (LyC) emitters at redshift z~3.7 identified using ultra-deep imaging below the Lyman limit (1-sigma limit of ~30 AB in a 2" diameter aperture). In 18 candidates, out of a sample of 19 with flux detected at >3-sigma level, the light centroid of the candidate LyC emission is offset from that of the LBG by up to 1.5". We fit the SED of the LyC candidates to spectral population synthesis models to measure photometric redshifts and the …