[ASA] IUCAA international conference "Stellar Variability: Taking the Pulse of the Universe" - abstracts & registration deadline

[Richard de Grijs]

Dear colleagues,

This is a reminder about the upcoming Abstracts Submission and 
Registration deadline for the IUCAA International Conference “Stellar 
Variability: Taking the Pulse of the Universe”, to be held at IUCAA, 
Pune, Maharashtra, India, between November 24-28, 2025.

*Register and submit the abstract**now**: 
**https://url.au.m.mimecastprotect.com/s/qcxdC6XQ4LfyOXrBWipfph5ZwWc?domain=web.iucaa.in 
<https://url.au.m.mimecastprotect.com/s/Ji5JC71R2NTZpLAJRcWhkhonOXM?domain=web.iucaa.in>

*Deadline: June 30, 2025 *

Maximum number of participants: 100.

*Conference website: **https://url.au.m.mimecastprotect.com/s/22swC81V0PTYv96Kki2iOhykV7B?domain=web.iucaa.in 
<https://url.au.m.mimecastprotect.com/s/cXDqC91WPRT238kpOiOsvhqAfhe?domain=web.iucaa.in>

*Conference email: **stars at iucaa.in* <mailto:stars at iucaa.in>

Please forward this announcement to your colleagues who may be 
interested in this conference.

We look forward to seeing you in Pune.

Best regards,


Marina Rejkuba, Anupam Bhardwaj and Devendra Ojha

*************************************************************************************************************

*Announcement*

**

*IUCAA International Conference*

*"Stellar Variability: Taking the Pulse of the Universe"*

**

*November 24-28, 2025*

*Venue: Inter-University Centre for Astronomy & Astrophysics (IUCAA) 
Pune, Maharashtra, India*

*************************************************************************************************************

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 andnear-field cosmology. This conference 
will explore the astrophysics of stellar variability and the use of 
variable stars as stellar population tracers and distance indicators.It 
will provide a broad overview of the field as well as bring networking 
opportunities for Indian astronomers with theinternational community to 
fully exploit the largeastronomical datasets from the recent and 
upcoming wide-field variability surveys.

*Important Dates:*

Abstract submission and Registration Form deadline: June 30, 2025

Program announcement: July 31, 2025

Registration fee and accommodation booking deadline: August 15, 2025

Conference starts: November 24, 2025

Conference email:stars at iucaa.in <mailto:stars at iucaa.in>

Conferencewebsite:https://url.au.m.mimecastprotect.com/s/cXDqC91WPRT238kpOiOsvhqAfhe?domain=web.iucaa.in 
<https://url.au.m.mimecastprotect.com/s/cXDqC91WPRT238kpOiOsvhqAfhe?domain=web.iucaa.in>

*Confirmed Invited Speakers:*

**

Earl P. Bellinger (Yale, USA)

Aru Beri (IISER, India)

Giuseppe Bono (Rome University, Italy)

Santi Cassisi (INAF Teramo, Italy)

Gisella Clementini (Bologna, Italy)

Laurent Eyer (Geneva, Switzerland)

Caroline Huang (CfA Harvard, USA)

Željko Ivezić (University of Washington, USA)

Barry Madore (Carnegie, USA)

Amanda Karakas (Monash Uni., Australia)

Marcella Marconi (INAF-OACN, Italy)

Clara E. Martínez-Vázquez (NOIRLab, USA)

László Molnár (Konkoly Obs., Hungary)

Joe P. Ninan (TIFR, India)

Grzegorz Pietrzyński (CAMK, Poland)

Zdeněk Prudil (ESO, Germany)

Saurabh Sharma (ARIES, India)

Dorota Skowron (Warsow Uni, Poland)

*SOC:*

**

Marina Rejkuba (ESO, Germany; Co-Chair)

Devendra K. Ojha (TIFR, India; Co-Chair)

Anupam Bhardwaj (IUCAA, India; Co-Chair)

Richard de Grijs (Macquarie Uni., Australia)

Jessy Jose (IISER, India)

Shashi Kanbur (SUNY Oswego, USA)

Noriyuki Matsunaga (Tokyo Uni., Japan)

Matteo Moneli (INAF-OAR, Italy)

Jeewan C. Pandey (ARIES, India)

Vincenzo Ripepi (INAF-OACN, Italy)

T. Sivarani (IIA, India)

Annapurni Subramaniam (IIA, India)

Robert Szabo (Konkoly Observatory, Hungary)

*LOC:*

Anupam Bhardwaj, Susmita Das, Prashant Nishad, IUCAA Standing LOC

*Scientific Rationale:*

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

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

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.

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.

Topics to be covered:

  * Stellar variability across the Hertzsprung-Russell diagram
  * Stellar evolution and Pulsation physics - structure and atmospheric
    dynamics
  * Stellar models and numerical simulations
  * Stellar multiplicity –binary stars and physical parameter determinations
  * Galactic archaeology and near-field cosmology with variable stars
  * Extragalactic distance scale with variable distance indicators
  * Upcoming large surveys and observational facilities for variable
    star research
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