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            <title xml:lang="en">Morphological Evolution from z ~ 2 in the COSMOS Field from Ks-Band Imaging</title>
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            <idno type="halRefHtml">&lt;i&gt;Highlights of Spanish Astrophysics V&lt;/i&gt;, Jul 2008, Santander, Spain, Spain. pp.301, &lt;a target="_blank" href="https://dx.doi.org/10.1007/978-3-642-11250-8_50"&gt;&amp;#x27E8;10.1007/978-3-642-11250-8_50&amp;#x27E9;&lt;/a&gt;</idno>
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              <p>Morphology is the most accessible tracer of galaxies physical structure, although its interpretation in the framework of galaxy evolution still remains a problem. Its quantification at high redshift requires deep high angular resolution imaging, the reason why space data (HST) are normally employed. At z &gt; 1, the HST visible cameras probe however the UV flux, dominated by the emission of young stars, which could bias the estimated morphologies towards late-type systems. In this paper we quantify the effects of this morphological k-correction at 1 &lt; z &lt; 2 by comparing morphologies measured in the K and I-bands in the COSMOS area. Ks-band data have indeed the advantage of probing old stellar populations in the rest-frame for z &lt; 2, enabling a determination of galaxy morphological types unaffected by recent star formation. We employ a new non-parametric method based on SVM to classify&amp;tilde;50,000 Ks selected galaxies in the COSMOS area observed with WIRCam at CFHT. We use a 10-dimensional volume, including 5 morphological parameters, and other characteristics of galaxies such as luminosity and redshift. The classification is globally in good agreement with the one obtained using HST/ACS for z &lt; 1. Above z &amp;tilde; 1, the I-band classification tends to find less early-type galaxies than the Ks-band one by a factor&amp;tilde;1.5 which might be a consequence of morphological k-correction effects. We argue therefore that studies based on I-band HST/ACS classifications at z &gt; 1 could be underestimating the elliptical population.</p>
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