
<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Dear all, <div class=""><br class=""></div><div class="">this time on Astro Journal Club Ivan is going to talk about the correlation of luminosity originating from AGN and from bulges of galaxies containing AGN. </div><div class=""><br class=""></div><div class="">Astro Journal club starts on Wednesday at 3 p.m. (sharp) in the seminar room F-201 of the Physics Department. </div><div class=""><br class=""></div><div class="">Presenter: Ivan Delvecchio</div><div class=""><br class=""></div><div class="">Title: Star formation in AGNs at the hundred parsec scale using MIR high resolution images</div><div class=""><br class=""></div><div class="">Authors: D. Ruchel-Dutra et al.</div><div class=""><br class=""></div><div class="">Abstract: </div><div class=""><br class=""></div><div class="">It has been well established in the past decades that the central black hole masses of galaxies correlate with dynamical properties of their harbouring bulges. This notion begs the question of whether there are causal connections between the AGN and its immediate vicinity in the host galaxy. In this paper we analyse the presence of circumnuclear star formation in a sample of 15 AGN using mid-infrared observations. The data consist of a set of 11.3 mm PAH emission and reference continuum images, taken with ground based telescopes, with sub-arcsecond resolution. By comparing our star formation estimates with AGN accretion rates, derived from X-ray luminosities, we investigate the validity of theoretical predictions for the AGN-starburst connection. Our main results are: i) circumnuclear star formation is found, at distances as low as tens of parsecs from the nucleus, in nearly half of our sample (7/15); ii) star formation luminosities are correlated with the bolometric luminosity of the AGN (<span class="MathJax_Preview"></span><span tabindex="0" id="MathJax-Element-1-Frame" class="MathJax"><nobr class=""><span role="math" id="MathJax-Span-1" class="math" style="width: 2.587em; display: inline-block;"><span style="display: inline-block; position: relative; width: 2.089em; height: 0px; font-size: 15px;" class=""><span style="position: absolute; clip: rect(0.194em, 1002.09em, 1.348em, -1000em); top: -1.016em; left: 0em;" class=""><span id="MathJax-Span-2" class="mrow"><span id="MathJax-Span-3" class="msubsup"><span style="display: inline-block; position: relative; width: 2.088em; height: 0px;" class=""><span style="position: absolute; clip: rect(3.186em, 1000.56em, 4.178em, -1000em); top: -4.009em; left: 0em;" class=""><span id="MathJax-Span-4" class="mi" style="font-family: STIXGeneral; font-style: italic;">L<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.003em;" class=""></span></span><span style="display: inline-block; width: 0px; height: 4.009em;" class=""></span></span><span style="position: absolute; top: -3.859em; left: 0.556em;" class=""><span id="MathJax-Span-5" class="texatom"><span id="MathJax-Span-6" class="mrow"><span id="MathJax-Span-7" class="mi" style="font-size: 10px; font-family: STIXGeneral; font-style: italic;">A</span><span id="MathJax-Span-8" class="mi" style="font-size: 10px; font-family: STIXGeneral; font-style: italic;">G</span><span id="MathJax-Span-9" class="mi" style="font-size: 10px; font-family: STIXGeneral; font-style: italic;">N<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.042em;" class=""></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.009em;" class=""></span></span></span></span></span><span style="display: inline-block; width: 0px; height: 1.016em;" class=""></span></span></span><span style="display: inline-block; overflow: hidden; vertical-align: -0.27em; border-left-width: 0px; border-left-style: solid; width: 0px; height: 1.142em;" class=""></span></span></nobr></span>) only for objects with <span class="MathJax_Preview"></span><span tabindex="0" id="MathJax-Element-2-Frame" class="MathJax"><nobr class=""><span role="math" id="MathJax-Span-10" class="math" style="width: 10.503em; display: inline-block;"><span style="display: inline-block; position: relative; width: 8.525em; height: 0px; font-size: 15px;" class=""><span style="position: absolute; clip: rect(1.547em, 1008.53em, 2.984em, -1000em); top: -2.597em; left: 0em;" class=""><span id="MathJax-Span-11" class="mrow"><span id="MathJax-Span-12" class="msubsup"><span style="display: inline-block; position: relative; width: 2.088em; height: 0px;" class=""><span style="position: absolute; clip: rect(3.186em, 1000.56em, 4.178em, -1000em); top: -4.009em; left: 0em;" class=""><span id="MathJax-Span-13" class="mi" style="font-family: STIXGeneral; font-style: italic;">L<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.003em;" class=""><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t: 4.009em;" class=""></span></span><span style="position: absolute; top: -3.859em; left: 0.556em;" class=""><span id="MathJax-Span-44" class="texatom"><span id="MathJax-Span-45" class="mrow"><span id="MathJax-Span-46" class="mi" style="font-size: 10px; font-family: STIXGeneral; font-style: italic;">A</span><span id="MathJax-Span-47" class="mi" style="font-size: 10px; font-family: STIXGeneral; font-style: italic;">G</span><span id="MathJax-Span-48" class="mi" style="font-size: 10px; font-family: STIXGeneral; font-style: italic;">N<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.042em;" class=""></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.009em;" class=""></span></span></span></span><span id="MathJax-Span-49" class="mo" style="font-family: STIXGeneral; padding-left: 0.313em;"><</span><span id="MathJax-Span-50" class="msubsup" style="padding-left: 0.313em;"><span style="display: inline-block; position: relative; width: 1.782em; height: 0px;" class=""><span style="position: absolute; clip: rect(3.163em, 1000.98em, 4.192em, -1000em); top: -4.009em; left: 0em;" class=""><span id="MathJax-Span-51" class="mn" style="font-family: STIXGeneral;">10</span><span style="display: inline-block; width: 0px; height: 4.009em;" class=""></span></span><span style="position: absolute; top: -4.412em; left: 1em;" class=""><span id="MathJax-Span-52" class="texatom"><span id="MathJax-Span-53" class="mrow"><span id="MathJax-Span-54" class="mn" style="font-size: 10px; font-family: STIXGeneral;">42</span></span></span><span style="display: inline-block; width: 0px; height: 4.009em;" class=""></span></span></span></span><span id="MathJax-Span-55" class="mspace" style="height: 0em; vertical-align: 0em; width: 0.188em; display: inline-block; overflow: hidden;"></span><span id="MathJax-Span-56" class="mspace" style="height: 0em; vertical-align: 0em; width: 0.188em; display: inline-block; overflow: hidden;"></span><span id="MathJax-Span-57" class="texatom"><span id="MathJax-Span-58" class="mrow"><span id="MathJax-Span-59" class="mi" style="font-family: STIXGeneral;">e</span><span id="MathJax-Span-60" class="mi" style="font-family: STIXGeneral;">r<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.002em;" class=""></span></span><span id="MathJax-Span-61" class="mi" style="font-family: STIXGeneral;">g</span><span id="MathJax-Span-62" class="mspace" style="height: 0em; vertical-align: 0em; width: 0.188em; display: inline-block; overflow: hidden;"></span><span id="MathJax-Span-63" class="mspace" style="height: 0em; vertical-align: 0em; width: 0.188em; display: inline-block; overflow: hidden;"></span><span id="MathJax-Span-64" class="msubsup"><span style="display: inline-block; position: relative; width: 1.302em; height: 0px;" class=""><span style="position: absolute; clip: rect(3.38em, 1000.35em, 4.188em, -1000em); top: -4.009em; left: 0em;" class=""><span id="MathJax-Span-65" class="mi" style="font-family: STIXGeneral;">s</span><span style="display: inline-block; width: 0px; height: 4.009em;" class=""></span></span><span style="position: absolute; top: -4.371em; left: 0.389em;" class=""><span id="MathJax-Span-66" class="texatom"><span id="MathJax-Span-67" class="mrow"><span id="MathJax-Span-68" class="mo" style="font-size: 10px; font-family: STIXGeneral;">−</span><span id="MathJax-Span-69" class="mn" style="font-size: 10px; font-family: STIXGeneral;">1</span></span></span><span style="display: inline-block; width: 0px; height: 4.009em;" class=""></span></span></span></span></span></span></span><span style="display: inline-block; width: 0px; height: 2.597em;" class=""></span></span></span><span style="display: inline-block; overflow: hidden; vertical-align: -0.338em; border-left-width: 0px; border-left-style: solid; width: 0px; height: 1.491em;" class=""></span></span></nobr></span>) seem to have starburst luminosities far greater than their bolometric luminosities. </div><div class=""><br class=""></div><div class="">Link: <a href="https://arxiv.org/abs/1701.05048" class="">https://arxiv.org/abs/1701.05048</a></div><div class=""><br class=""></div><div class="">If you have recently read interesting astrophysics paper you would like to present, please contact me via e-mail: <a href="mailto:lceraj@phy.hr" class="">lceraj@phy.hr</a></div><div class=""><br class=""></div><div class="">See you on Wednesday.</div><div class=""><br class=""></div><div class="">Cheers,</div><div class="">Lana</div><div class=""><br class=""></div></body></html>