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<p class="MsoNormal"><span style="font-size:12.0pt;mso-fareast-language:EN-US">Dear colleagues,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;mso-fareast-language:EN-US">For those interested in galaxy spectral energy distributions, the IAU commission J1 on SEDs organizes a monthly online seminar where invited speakers discuss various SED-related
topics. Please see below the announcement for the next one, happening on May 12<sup>th</sup>. For those who can’t attend live, the talks are recorded and uploaded to Youtube (see details below).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;mso-fareast-language:EN-US">Cheers<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;mso-fareast-language:EN-US">Elisabete<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Aptos Display",sans-serif;color:black">---------------------------------------------------------------------------------------------------------<br>
A/Prof Elisabete da Cunha (she/her)<br>
<br>
Principal Research Fellow<br>
<br>
ORCiD: </span><a href="https://url.au.m.mimecastprotect.com/s/Ogn7C6XQ4Lfy08M91cpfzf5QRF7?domain=orcid.org"><span style="font-size:12.0pt;font-family:"Aptos Display",sans-serif;color:#467886">https://orcid.org/0000-0001-9759-4797</span></a><span style="font-size:12.0pt;font-family:"Aptos Display",sans-serif;color:black"> <br>
<br>
International Centre for Radio Astronomy Research • University of Western Australia<br>
ICRAR M468, 35 Stirling Hwy, Crawley 6009, Western Australia<br>
<br>
Chair — Development, Equity, and Inclusion Committee<br>
UWA DEI Contact Officer<br>
Mental Health First Aid Officer<br>
LGBTQIA+ Ally<br>
<br>
Fellow of the Astronomical Society of Australia<br>
<br>
---------------------------------------------------------------------------------------------------------<br>
We acknowledge we are situated on Noongar land, and that Noongar people remain the spiritual and cultural custodians <br>
of their land, and continue to practise their values, languages, beliefs, and knowledge.<br>
We pay our respects to the traditional owners of the lands on which we live and work across Western Australia and Australia.<br>
---------------------------------------------------------------------------------------------------------</span><span style="font-size:12.0pt;mso-fareast-language:EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<b><span style="font-size:12.0pt;color:black">From: </span></b><span style="font-size:12.0pt;color:black">Ignacio Ferreras <ignacio.ferreras@iac.es><br>
<b>Date: </b>Monday, 5 May 2025 at 19:31<br>
<b>To: </b>Ralf Siebenmorgen <rsiebenm@eso.org>, Médéric Boquien <mederic.boquien@oca.eu>, Elisabete Lima da Cunha <elisabete.dacunha@uwa.edu.au>, aaron.robotham@icrar.org <aaron.robotham@icrar.org>, azezas@physics.uoc.gr <azezas@physics.uoc.gr>, Nick Kylafis
<kylafis@physics.uoc.gr>, salims@indiana.edu <salims@indiana.edu><br>
<b>Subject: </b>Next IAU J1 seminar<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:12.0pt">Dear J1 OC<o:p></o:p></span></p>
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Please find below the announcement that will be circulated within the commission.<br>
It would be great if you could also circulate this within your national/institution lists. <br>
Thank you !<br>
<br>
Regards,<br>
Ignacio<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-left:36.0pt"><strong><span style="font-size:12.0pt;font-family:Menlo;color:#0433FF">Dear members of IAU Commission J1,</span></strong><span style="font-size:12.0pt"><o:p></o:p></span></p>
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<strong><span style="font-size:12.0pt;font-family:Menlo;color:#0433FF">This is an announcement of our next online seminar:</span></strong><b><span style="font-size:12.0pt"><br>
<br>
</span></b><strong><span style="font-size:12.0pt;font-family:Menlo;color:#0433FF">Date & Time: May 12, 2025 11:00am London (GMT+1)</span></strong><b><span style="font-size:12.0pt"><br>
</span></b><b><span style="font-size:12.0pt;font-family:Menlo;color:#0433FF"><br>
<strong><span style="font-family:Menlo">Join Zoom Meeting</span></strong><br>
</span></b><a href="https://url.au.m.mimecastprotect.com/s/yGZjC71R2NTZVoy6QSWhlfodwU_?domain=rediris.zoom.us"><b><span style="font-size:12.0pt;font-family:Menlo">https://rediris.zoom.us/j/91898338628</span></b></a><strong><span style="font-size:12.0pt;font-family:Menlo;color:#0433FF"> </span></strong><b><span style="font-size:12.0pt;font-family:Menlo;color:#0433FF"><br>
<strong><span style="font-family:Menlo">Meeting ID: 918 9833 8628</span></strong><br>
<br>
<strong><span style="font-family:Menlo">Impact of Binary Stars on Spectral Energy Distributions</span></strong></span></b><span style="font-size:12.0pt"><o:p></o:p></span></p>
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<strong><span style="font-size:12.0pt;font-family:Menlo;color:#0433FF">Zhanwen Han, </span></strong><span lang="EN-GB" style="font-size:12.0pt;font-family:"PingFang TC",sans-serif;color:#0433FF;background:white">韩</span><span lang="EN-GB" style="font-size:12.0pt;font-family:"MS Gothic";color:#0433FF;background:white">占文</span><strong><span style="font-size:12.0pt;font-family:Menlo;color:#0433FF"> (</span></strong><b><span style="font-size:12.0pt;font-family:Menlo;color:#0433FF">Yunnan
Observatories, Chinese Academy of Sciences<strong><span style="font-family:Menlo">)</span></strong></span></b><span style="font-size:12.0pt"><o:p></o:p></span></p>
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<b><span style="font-size:12.0pt;font-family:Menlo;color:#0433FF">More than half of all stars reside in binary systems, and binary evolution plays a critical role in our understanding of the Universe. Binary interactions are responsible for a variety of astrophysical
phenomena, including Type Ia supernovae, double black holes, double neutron stars, heavy-element production, reionization of the Universe, and significant modifications to the spectral energy distributions (SEDs) of simple stellar populations (SSPs).</span></b><span style="font-size:12.0pt"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><b><span style="font-size:12.0pt;font-family:Menlo;color:#0433FF">In this talk, I will begin with a brief overview of single star evolution, followed by an introduction to the key binary interaction processes
that can dramatically alter stellar fates. I will then present the framework of evolutionary population synthesis and demonstrate how binary evolution influences the SEDs of SSPs across the electromagnetic spectrum—from X-rays to the infrared. Finally, I will
discuss how the inclusion of binary interactions affects the physical parameters derived from SED fitting, particularly for studies of old stellar populations using short-wavelength observations, where binary effects must not be neglected.</span></b><span style="font-size:12.0pt"><o:p></o:p></span></p>
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<strong><span style="font-size:12.0pt;font-family:Menlo;color:#0433FF">The talk will be recorded and uploaded to our YouTube Channel:</span></strong><b><span style="font-size:12.0pt"><br>
</span></b><a href="https://url.au.m.mimecastprotect.com/s/D0plC91WPRT2N9xKMIOs5fqya8q?domain=urldefense.com" target="_blank"><b><span style="font-size:12.0pt;font-family:Menlo;color:#0433FF">https://www.youtube.com/@IAUCommissionJ1</span></b></a><strong><span style="font-size:12.0pt;font-family:Menlo;color:#0433FF"> </span></strong><b><span style="font-size:12.0pt"><br>
</span></b><strong><span style="font-size:12.0pt;font-family:Menlo;color:#0433FF">(You may also access it from the IAU YouTube link by clicking on "Channels")</span></strong><b><span style="font-size:12.0pt"><br>
<br>
</span></b><strong><span style="font-size:12.0pt;font-family:Menlo;color:#0433FF">Looking forward to seeing you at the seminar!</span></strong><b><span style="font-size:12.0pt"><br>
<br>
</span></b><strong><span style="font-size:12.0pt;font-family:Menlo;color:#0433FF">Ignacio Ferreras,</span></strong><b><span style="font-size:12.0pt"><br>
</span></b><strong><span style="font-size:12.0pt;font-family:Menlo;color:#0433FF">on behalf of the J1 Organising Committee</span></strong><b><span style="font-size:12.0pt"><br>
<br>
</span></b><strong><span style="font-size:12.0pt;font-family:Menlo;color:#0433FF">Reply-To Contact & Email: Ignacio Ferreras, </span></strong><a href="mailto:ignacio.ferreras@iac.es" target="_blank"><b><span style="font-size:12.0pt;font-family:Menlo;color:#0433FF">ignacio.ferreras@iac.es</span></b></a><span style="font-size:12.0pt"><o:p></o:p></span></p>
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