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<p class="MsoNormal"><b>************************************</b><b>********************************************************</b><b><span lang="EN-US">**********************************************************<o:p></o:p></span></b></p>
<p class="MsoNormal" style="text-align:center" align="center"><b>First
Announcement<o:p></o:p></b></p>
<p class="MsoNormal" style="text-align:center" align="center"><b><o:p> </o:p></b></p>
<p class="MsoNormal" style="text-align:center" align="center"><b>IUCAA
International Conference<o:p></o:p></b></p>
<p class="MsoNormal" style="text-align:center" align="center"><b>"Stellar
Variability: Taking the Pulse of the Universe"<o:p></o:p></b></p>
<p class="MsoNormal" style="text-align:center" align="center"><b><o:p> </o:p></b></p>
<p class="MsoNormal" style="text-align:center" align="center"><b>November
24-28, 2025<o:p></o:p></b></p>
<p class="MsoNormal" style="text-align:center" align="center"><b>Venue:
Inter-University Centre for Astronomy & Astrophysics
(IUCAA) Pune, Maharashtra, India<o:p></o:p></b></p>
<p class="MsoNormal"><b>********************************************************************************************</b><b><span lang="EN-US">**********************************************************<o:p></o:p></span></b></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Dear Colleagues,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We are pleased to announce the IUCAA
International Conference entitled: "Stellar Variability:
Taking the Pulse of the Universe",
<span lang="EN-US"><o:p></o:p></span> to be held at IUCAA,
Pune, Maharashtra, India, between November 24-28, 2025.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Stellar variability, both intrinsic as in
pulsating stars and extrinsic as caused by binary motions,
plays a crucial role in a wide range of topics in modern
astrophysics and
<span lang="EN-US"><o:p></o:p></span> near-field cosmology.
This conference will explore the astrophysics of stellar
variability and the use of variable stars as stellar
population tracers and distance indicators.
<span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><br>
</p>
<p class="MsoNormal">It will provide a broad overview of the
field as well as bring networking opportunities for Indian
astronomers with the international community to fully exploit
the large
<span lang="EN-US"><o:p></o:p></span> astronomical datasets
from the recent and upcoming wide-field variability surveys.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b>Important Dates:<o:p></o:p></b></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Registration opens: April 1<span lang="EN-US">0</span>, 2025<o:p></o:p></p>
<p class="MsoNormal">Abstract submission deadline: June 15, 2025<o:p></o:p></p>
<p class="MsoNormal">Program announcement: July 31, 2025<o:p></o:p></p>
<p class="MsoNormal">Registration fee deadline: August 15, 2025<o:p></o:p></p>
<p class="MsoNormal">Hotels/Guest House booking deadline: August
15, 2025<o:p></o:p></p>
<p class="MsoNormal">Conference starts: November 24, 2025<o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Conference email</span>:
<a href="mailto:stars@iucaa.in" moz-do-not-send="true" class="moz-txt-link-freetext">
stars@iucaa.in</a><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Conference</span><span lang="EN-US"> </span>
<span lang="EN-US">website</span>: <a href="https://url.au.m.mimecastprotect.com/s/uLSvCk81N9tqVNjjnc2fvUGCiSO?domain=web.iucaa.in" moz-do-not-send="true">
https://web.iucaa.in/ws/~SVTPU2025/index.html</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b>Confirmed Invited Speakers:</b><b><span lang="EN-US"><o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span lang="EN-US"><o:p> </o:p></span></b></p>
<p class="MsoNormal">Earl P. Bellinger (Yale, USA)<o:p></o:p></p>
<p class="MsoNormal">Aru Beri (IISER, India)<o:p></o:p></p>
<p class="MsoNormal">Giuseppe Bono (Rome University, Italy) <o:p></o:p></p>
<p class="MsoNormal">Santi Cassisi (INAF Teramo, Italy)<o:p></o:p></p>
<p class="MsoNormal">Gisella Clementini (Bologna, Italy)<o:p></o:p></p>
<p class="MsoNormal">Laurent Eyer (Geneva, Switzerland)<o:p></o:p></p>
<p class="MsoNormal">Caroline Huang (CfA Harvard, USA)<o:p></o:p></p>
<p class="MsoNormal">Željko Ivezić (University of Washington,
USA) <o:p></o:p></p>
<p class="MsoNormal">Barry Madore (Carnegie, USA)<o:p></o:p></p>
<p class="MsoNormal">Amanda Karakas (Monash Uni., Australia)</p>
<p class="MsoNormal"><span lang="EN-US">Barry Madore (Carnegie,
USA)</span><o:p></o:p></p>
<p class="MsoNormal">Marcella Marconi (INAF-OACN, Italy)<o:p></o:p></p>
<p class="MsoNormal">Clara E. Martínez-Vázquez (NOIRLab, USA)<o:p></o:p></p>
<p class="MsoNormal">László Molnár (Konkoly Obs., Hungary)<o:p></o:p></p>
<p class="MsoNormal">Joe P. Ninan (TIFR, India)<o:p></o:p></p>
<p class="MsoNormal">Grzegorz Pietrzyński (CAMK, Poland)<o:p></o:p></p>
<p class="MsoNormal">Zdeněk Prudil (ESO, Germany)<o:p></o:p></p>
<p class="MsoNormal">Saurabh Sharma (ARIES, India)<o:p></o:p></p>
<p class="MsoNormal">Dorota Skowron (Warsow Uni, Poland)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b>SOC:</b><b><span lang="EN-US"><o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span lang="EN-US"><o:p> </o:p></span></b></p>
<p class="MsoNormal">Marina Rejkuba (ESO, Germany; Co-Chair)<o:p></o:p></p>
<p class="MsoNormal">Devendra K. Ojha (TIFR, India; Co-Chair)<o:p></o:p></p>
<p class="MsoNormal">Anupam Bhardwaj (IUCAA, India; Co-Chair)<o:p></o:p></p>
<p class="MsoNormal">Richard de Grijs (Macquarie Uni.,
Australia)<o:p></o:p></p>
<p class="MsoNormal">Jessy Jose (IISER, India)<o:p></o:p></p>
<p class="MsoNormal">Shashi Kanbur (SUNY Oswego, USA)<o:p></o:p></p>
<p class="MsoNormal">Noriyuki Matsunaga (Tokyo Uni., Japan)<o:p></o:p></p>
<p class="MsoNormal">Matteo Moneli (INAF-OAR, Italy)<o:p></o:p></p>
<p class="MsoNormal">Jeewan C. Pandey (ARIES, India)<o:p></o:p></p>
<p class="MsoNormal">Vincenzo Ripepi (INAF-OACN, Italy) <o:p></o:p></p>
<p class="MsoNormal">T. Sivarani (IIA, India)<o:p></o:p></p>
<p class="MsoNormal">Annapurni Subramaniam (IIA, India) <o:p></o:p></p>
<p class="MsoNormal">Robert Szabo (Konkoly Observatory, Hungary)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b>LOC:<o:p></o:p></b></p>
<p class="MsoNormal">Anupam Bhardwaj, Susmita Das, Prashant
Nishad, IUCAA Standing LOC<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b>Scientific Rationale:<o:p></o:p></b></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Massive time-domain astronomical surveys in
the last decade have revolutionised our knowledge of the
properties, physical nature, and the very existence of several
different<o:p></o:p> classes of variable stars known to date.
Stellar variability, both intrinsic as in pulsating stars and
extrinsic as caused by binary motions, plays a crucial role in
a wide range of<o:p></o:p> topics in modern astrophysics and
near-field cosmology. Variable stars have been extensively
used to explore various aspects of star-planet formation and
evolution, applied to Galactic and extragalactic archaeology
studies and have played the key role in establishing the
cosmic distance scale. Thanks to wide-field variability
surveys (e.g. Gaia, TESS, OGLE, ASAS-SN, CRTS, ZTF, VVV ,
VMC), the numbers of variable stars have increased
exponentially, providing both opportunities for new
discoveries as well as challenges associated with dealing with
a plethora of data. The latest Gaia Data Release 3 (DR3) has
published light curves of more than 10 million variable
sources and DR4, expected in late 2026, will increase the
number statistics by at least a factor of two. At the same
time, Vera C. Rubin Observatory’s Legacy Survey of Space and
Time (LSST) will have started operations further expanding the
parameter space for multi-wavelength variable stars studies to
fainter magnitudes and larger distances. Stellar variability
studies will undoubtedly be at their zenith in the next few
years making this conference very timely.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The conference will explore the
astrophysics of stellar variability and the use of variable
stars as stellar population tracers and distance indicators.
It will provide the opportunity for young researchers to get a
broad overview of this exciting field, and connect Indian
astronomers with the international community providing new
networking opportunities to fully exploit these
unprecedentedly large astronomical datasets on the horizon.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Topics to be covered:<o:p></o:p></p>
<ul style="margin-top:0cm" type="disc">
<li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo1">Stellar
variability across the Hertzsprung-Russell diagram<o:p></o:p></li>
<li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo1">Stellar
evolution and Pulsation physics - structure and atmospheric
dynamics<o:p></o:p></li>
<li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo1">Stellar
models and numerical simulations<o:p></o:p></li>
<li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo1">Stellar
multiplicity –
<span lang="EN-US">b</span>inary stars and physical
parameter determinations<o:p></o:p></li>
<li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo1">Galactic
archaeology and near-field cosmology with variable stars<o:p></o:p></li>
<li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo1">Extragalactic
distance scale with variable distance indicators<o:p></o:p></li>
<li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo1">Upcoming
large surveys and observational facilities for variable star
research<o:p></o:p></li>
</ul>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Please forward this
announcement to your colleagues who may be interested in
this conference.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Best regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Marina Rejkuba, Anupam
Bhardwaj and Devendra Ojha<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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