[ASA] FW: Next IAU J1 seminar

Tue May 6 13:27:53 AEST 2025

Dear colleagues,

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 12th. For those who can’t attend live, the talks are recorded and uploaded to Youtube (see details below).

Cheers
Elisabete

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A/Prof Elisabete da Cunha (she/her)

Principal Research Fellow

ORCiD: https://url.au.m.mimecastprotect.com/s/Ogn7C6XQ4Lfy08M91cpfzf5QRF7?domain=orcid.org

International Centre for Radio Astronomy Research • University of Western Australia
ICRAR M468, 35 Stirling Hwy, Crawley 6009, Western Australia

Chair — Development, Equity, and Inclusion Committee
UWA DEI Contact Officer
Mental Health First Aid Officer
LGBTQIA+ Ally

Fellow of the Astronomical Society of Australia

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From: Ignacio Ferreras <ignacio.ferreras at iac.es>
Date: Monday, 5 May 2025 at 19:31
To: Ralf Siebenmorgen <rsiebenm at eso.org>, Médéric Boquien <mederic.boquien at oca.eu>, Elisabete Lima da Cunha <elisabete.dacunha at uwa.edu.au>, aaron.robotham at icrar.org <aaron.robotham at icrar.org>, azezas at physics.uoc.gr <azezas at physics.uoc.gr>, Nick Kylafis <kylafis at physics.uoc.gr>, salims at indiana.edu <salims at indiana.edu>
Subject: Next IAU J1 seminar
Dear J1 OC

Please find below the announcement that will be circulated within the commission.
It would be great if you could also circulate this within your national/institution lists.
Thank you !

Regards,
Ignacio

Dear members of IAU Commission J1,
This is an announcement of our next online seminar:

Date & Time: May 12, 2025 11:00am London (GMT+1)

Join Zoom Meeting
https://url.au.m.mimecastprotect.com/s/yGZjC71R2NTZVoy6QSWhlfodwU_?domain=rediris.zoom.us
Meeting ID: 918 9833 8628

Impact of Binary Stars on Spectral Energy Distributions
Zhanwen Han, 韩占文 (Yunnan Observatories, Chinese Academy of Sciences)
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).
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.
The talk will be recorded and uploaded to our YouTube Channel:
https://url.au.m.mimecastprotect.com/s/M1UMC81V0PTYPLQMzh2iGfyQzxc?domain=youtube.com<https://url.au.m.mimecastprotect.com/s/D0plC91WPRT2N9xKMIOs5fqya8q?domain=urldefense.com>
(You may also access it from the IAU YouTube link by clicking on "Channels")

Looking forward to seeing you at the seminar!

Ignacio Ferreras,
on behalf of the J1 Organising Committee

Reply-To Contact & Email: Ignacio Ferreras, ignacio.ferreras at iac.es<mailto:ignacio.ferreras at iac.es>

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