The OTELO survey as a morphological probe. Last ten Gyr of galaxy evolution : The mass–size relation up to z = 2

Media type: E-Article
Title: The OTELO survey as a morphological probe. Last ten Gyr of galaxy evolution : The mass–size relation up to z = 2 : The mass–size relation up to <i>z</i>
Contributor: Nadolny, Jakub; Bongiovanni, Ángel; Cepa, Jordi; Cerviño, Miguel; Pérez García, Ana María; Pović, Mirjana; Pérez Martínez, Ricardo; Sánchez-Portal, Miguel; de Diego, José A.; Pintos-Castro, Irene; Alfaro, Emilio; Castañeda, Héctor O.; Gallego, Jesús; Jesús González, J.; Ignacio González-Serrano, J.; Lara-López, Maritza A.; Padilla Torres, Carmen P.
imprint: EDP Sciences, 2021
Published in: Astronomy & Astrophysics
Language: Not determined
DOI: 10.1051/0004-6361/202037861
ISSN: 0004-6361; 1432-0746
Keywords: Space and Planetary Science ; Astronomy and Astrophysics
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Footnote:
Description: <jats:p><jats:italic>Context.</jats:italic> The morphology of galaxies provide us with a unique tool for relating and understanding other physical properties and their changes over the course of cosmic time. It is only recently that we have been afforded access to a wealth of data for an unprecedented number galaxies thanks to large and deep surveys.</jats:p> <jats:p><jats:italic>Aims.</jats:italic> We present the morphological catalogue of the OTELO survey galaxies detected with the <jats:italic>Hubble</jats:italic> Space Telescope (HST)-ACS <jats:italic>F</jats:italic>814<jats:italic>W</jats:italic> images. We explore various methods applied in previous works to separate early-type (ET) and late-type (LT) galaxies classified via spectral energy distribution (SED) fittings using galaxy templates. Together with this article, we are releasing a catalogue containing the main morphological parameters in the <jats:italic>F</jats:italic>606<jats:italic>W</jats:italic> and <jats:italic>F</jats:italic>814<jats:italic>W</jats:italic> bands derived for more than 8000 sources.</jats:p> <jats:p><jats:italic>Methods.</jats:italic> The morphological analysis is based on the single-Sérsic profile fit. We used the <jats:monospace>GALAPAGOS2</jats:monospace> software to provide multi-wavelength morphological parameters fitted simultaneously in two HST-ACS bands. The <jats:monospace>GALAPAGOS2</jats:monospace> software detects, prepares guess values for <jats:monospace>GALFIT-M</jats:monospace>, and provides the best-fitting single-Sérsic model in both bands for each source. Stellar masses were estimated using synthetic rest-frame magnitudes recovered from SED fittings of galaxy templates. The morphological catalogue is complemented with concentration indexes from a separate <jats:monospace>SExtractor</jats:monospace> dual, high dynamical range mode.</jats:p> <jats:p><jats:italic>Results.</jats:italic> A total of 8812 sources were successfully fitted with single-Sérsic profiles. The analysis of a carefully selected sample of ∼3000 sources up to <jats:italic>z</jats:italic><jats:sub>phot</jats:sub> = 2 is presented in this work, of which 873 sources were not detected in previous studies. We found no statistical evidence for the evolution of the low-mass end of mass–size relation for ET and LT since <jats:italic>z</jats:italic> = 2. Furthermore, we found a good agreement for the median size evolution for ET and LT galaxies, for a given stellar mass, with the data from the literature. Compared to previous works on faint field galaxies, we found similarities regarding their rest-frame colours as well as the Sérsic and concentration indices.</jats:p>
Access State: Open Access

The OTELO survey as a morphological probe. Last ten Gyr of galaxy evolution : The mass–size relation up to z = 2 : The mass–size relation up to <i>z</i> = 2

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