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  • Ciclo de coloquios del IAR: Lunes 24 de junio 13:30hs.

Coloquio a cargo del Lic. Leandro Abaroa

Título: Cúmulos de agujeros negros estelares en núcleos galácticos activos súper Eddington

Resumen: Los núcleos galácticos activos (AGN) son potenciados por la acreción de agujeros negros supermasivos (SMBH) con masas en el rango de millones a miles de millones de masas solares. Alrededor de los SMBH pueden orbital distintos tipos de objetos, incluidas estrellas masivas, estrellas de neutrones, nubes y binarias de rayos X. Agujeros negros aislados de masa estelar (BH de ~10 masas solares) también deberían estar presentes en grandes cantidades dentro del parsec central de las galaxias. Se espera que estos BH formen un cúmulo alrededor del SMBH como resultado de la alta tasa de formación estelar en el interior de la galaxia y la migración de agujeros negros causada por la fricción dinámica gravitacional. En esta charla, exploraremos la posibilidad de detectar emisión electromagnética de un grupo central de BHs en un AGN súper Eddington, es decir, un AGN donde la tasa de acreción en el SMBH central es mayor que la tasa de Eddington. En este régimen, el disco de acreción lanza vientos poderosos que interactúan con los objetos que orbitan alrededor del SMBH. Los BH aislados pueden capturar materia de este viento denso, lo que lleva a la formación de pequeños discos de acreción a su alrededor. Si se producen jets en estos microcuásares no-estelares, podrían acelerarse partículas hasta energías relativistas. Estas partículas, a su vez, deberían enfriarse mediante diferentes procesos radiativos. De esta manera, el viento del SMBH puede eventualmente iluminar a los BHs mediante la producción de radiación térmica y no térmica.

La charla se llevará a cabo en modo presencial y también será transmitida por el canal de YouTube del IAR:

Los esperamos! Saludos cordiales,



  • Abstract Submission and Travel Award Application | GGOS Topical Meeting on Atmosphere

Dear colleagues,

This is a friendly reminder that the abstract submission deadline for the GGOS Topical Meeting on the Atmosphere is approaching on 31 July. We encourage all researchers working in the field of the atmosphere, particularly those focusing on spatio-temporal variations from the troposphere to the ionosphere/plasmasphere, to submit their abstracts as soon as possible.

If you know of a young scientist in the field of atmosphere, please forward this email to encourage them to apply for the travel award by 15 July. This opportunity provides crucial financial support to attend and present research at our meeting in Potsdam, Germany, from October 7 to 9, 2024.

For detailed submission guidelines and to apply for the Travel Award, please visit

Thank you for your attention, and we look forward to your contributions to this important meeting.

Best regards,

Laura Sánchez, GGOS President

Martin Sehnal, Director of the GGOS Coordinating Office.




Euler International Mathematical Institute, Saint Petersburg, RUSSIA.
August 19-23, 2024

The Euler International Mathematical Institute, Saint Petersburg University, and Saint Petersburg Department of Steklov Institute of Mathematics RAS are pleased to announce the 3rd
International Conference ANALYTICAL METHODS OF CELESTIAL MECHANICS AMCM'2024, to be held in August 19-23, 2024 at the Euler International Mathematical Institute, Saint Petersburg,Russia.
The conference is devoted to the memory of K.V.Kholshevnikov (1939-2021). The event will take place on August 19-23 in the Euler International Mathematical Institute, St.Petersburg, Russia.

The conference will be held in a hybrid format. Participants who can visit Saint Petersburg at this time will be able to participate in the usual format in person. Those participants who cannot visit Saint Petersburg have the opportunity to participate in the conference in a remote format. Zoom sessions will be organized and all registered participants will receive information about the zoom channel of the AMCM2024 conference

Official languages are English and Russian.


A. Bruno, A. Batkhin, P. Cincotta, E. Kuznetsov,S. Klioner, A. Melnikov, E. Polyakhova, V. Sidorenko, I. Shevchenko, K. Tanikawa, V. Titov, N. Vassiliev, V. Edneral, A. Petrov, I. Tupikova

Others to be confirmed.


Nikolay Vassiliev (Saint Petersburg), co-chair
Ivan Shevchenko (Saint Petersburg), co-chair
Vladimir Titov (Saint Petersburg), co-chair
Victor Brumberg (Boston)
Alexandr Bruno (Moscow)
Alexandr Batkhin (Moscow)
Pablo Cincotta (La Plata)
Vladislav Sidorenko (Moscow)
Sergei Klioner (Dresden)
Yuri Medvedev (Saint Petersburg)


N. Vassiliev (Chair), I. Shevchenko, V. Titov, E. Novikova, N. Petrova,S. Petrakova (secretary),


A. Bruno, P. Cincotta, E. Kuznetsov,S. Klioner, A. Melnikov, A. Mylläri, E. Polyakhova, V. Sidorenko, I. Shevchenko, K. Tanikawa, V. Titov, N. Vassiliev, A. Petrov, V. Edneral,
I. Tupikova

Others to be confirmed.

The conference topics will include but not restricted to:

- qualitative methods of celestial mechanics,
- N-body problem,
- exact solutions,
- stability and bifurcation analysis,
- integrability in classical and celestial mechanics,
- KAM theory,
- dynamics of stellar systems,
- dynamics of planets and satellites in the Solar system
- interactions between analytical methods and numerical simulations
- dynamics of planetary systems,
- problems of asteroid-cometary hazard,
- theory of Solar sails

The program will consist of 50 min plenary talks, 30-min communications.
We plan five working days, each day containing two plenary talks in the morning and 7 - 8 contributed talks


If you wish to give a talk, please, submit an abstract and/or extended abstract up to four pages, (both TeX & a PDF files) at the conference site.
For more details see the Online Submission page on the Conference website.
The book of abstracts will be published before the Conference.


In order to register for the Conference you should create a personal account at the site and complete an online registration form.

Deadline for the registration July 05
Uploading the final versions of the abstracts July 22
First working day of AMCM'2024 August 19


We have a possibility to provide financial support for travel and/or accommodation, especially to key speakers and junior researchers. Financial support
will be provided for eligible applicants, subject to availability.


Accommodation will be arranged at nearby hotels (we shall do our best to arrange it at reasonably low price). The Euler Mathematical Institute is located near the river Malaya Nevka in a nice historical part of Saint Petersburg. August is a peak time of tourist season. To arrange your accommodation as good as possible we will book the hotel rooms beforehand. If you have some special requests (say, you prefer a downtown hotel, you come with an accompanying person, etc), please indicate it in the registration form.


Street address: Pesochnaya nab. 10, St.Petersburg 197022, Russia
Postal address: nab. Fontanki, 27, St.Petersburg 191023, Russia
Phones: +7 812 234 05 74, +7 960 279 10 37
Fax: +7 812 234 05 74


  • Global Call for Data Science Trainer's Hackathon 2024!

Dear Colleagues,

We are excited to announce a global call for the Data Science Trainer's Hackathon 2024, taking place at WITS University in Johannesburg, South Africa, this October. If you are passionate about data science and community development, this is your chance to contribute significantly! Teams worldwide will receive training and support to host regional hackathons at their own institutions in early 2025.

Applications open on June 18, 2024, and close on July 15, 2024.

Don't miss this opportunity to make an impact in the data science community! Please spread the word and encourage others to join as well.

For more details and to apply, visit:


  • Anuncio Workshop GEM24

GEM24 Workshop: Geomatics in Environmental Monitoring (cupos limitados, online y gratuito).

Fecha: 28 y 29 de octubre de 2024.
Envío de resúmenes hasta 15 de agosto de 2024.



  • Mind the Gap: Galaxies and the Large-Scale Structure

Dear Colleagues,

We are pleased to announce the upcoming workshop titled "Mind the Gap: Galaxies and the Large Scale Structure," which will be held from December 2-6, 2024, in Córdoba, Argentina.

The aim of this workshop is to bring together experts in galaxy evolution and large-scale structure to explore the intricate connections between galaxy properties and their environmental contexts and how these relationships serve as tracers of the underlying matter distribution. While cosmological tests have reached remarkable precision in parameter determination, a significant challenge remains in understanding how luminous matter outlines large-scale structures. Galaxies' biases, intrinsic alignments, and other astrophysical properties, when considered alongside cosmological probes, may be seen as systemic noise. Nevertheless, their statistical analysis and correlation with LSS can offer profound insights into the formation and evolution of galaxies and their role in mapping the universe's matter distribution.

The list of Invited speakers:

Eric Gawiser (Rutgers Univ.)

Laura Ceccarelli (UNC)

Frank van den Bosch (Yale Univ.)

Klaus Dolag (MPA/USM)

Job Leon Feldbrugge (Edinburgh Univ.)

Noam Libeskind (Leibniz Inst., Potsdam)
Pablo Lopez (UNC)
lya Khrykin (PUCV, Chile)
Alice Pisani (CNRS, tbc)
Cristiano Porciani (UniBonn, tbc)
Jens Jasche (Stockholm Univ., tbc)
Filippo Fraternali (Groeningen Univ. tbc)

Regrettably, due to recent budget cuts in science funding in Argentina, we are unable to provide financial support for travel and accommodation. We understand that this may pose a challenge and sincerely hope it does not deter you from joining us and contributing to this important dialogue.

Important dates:

August 16th: deadline abstract submission.

September 2nd: accepted works communication

September 6th: end of early registration

December 2dn: Workshop

In the very near future the conference web page will be available at (still under construction) to follow updates, please share this announcement among your colleagues and don't hesitate to contact us to:

Best regards,

Mind the Gap: Galaxies and the LSS
Local Organizing Committee:
Sebastián Gualpa, Laura Ceccarelli, Facundo Rodriguez, Pablo López, Nelson Padilla, Andrés Ruiz, and Federico Stasyszyn.

Scientific Organizing Committee

Claudia Lagos, John Peacock, Rien van de Weygaert, Baojiu Li, Miguel Aragon Calvo, Franco Vazza, Elisa Chisari, Diego Garcia Lambas, Ravi Sheth, and Dante Paz.

Primera circular



Estimados/as colegas:

Tenemos el agrado de invitarlos/as a participar de la sesión técnica ST14 GEOFÍSICA Y PALEOMAGNETISMO que se realizará en el marco del XXII Congreso Geológico Argentino en la ciudad de San Luis, desde el 17 al 22 de noviembre de 2024 (

La Sesión Técnica reunirá presentaciones enfocadas a la aplicación de los distintos métodos geofísicos en la prospección de recursos, la resolución de problemáticas geológicas, estructurales, geodinámicas, ambientales, arqueológicas, ingenieriles, etc., tanto a escala local como regional. También se incluirán trabajos orientados a la aplicación del paleomagnetismo, la anisotropía de susceptibilidad magnética y el magnetismo ambiental a problemas tales como paleoreconstrucción de continentes, geología estructural, determinación de edades magnéticas, paleointensidad del CMT, contaminación, paleoclima, ocupación humana, etc. Serán bienvenidas contribuciones que presenten análisis estadísticos; avances metodológicos; modelados; etc. También se esperan trabajos de análisis de la sismicidad y la aplicación de los métodos sismológicos para conocer la estructura del subsuelo.

¡Esperamos verlos/as en San Luis en noviembre!

Saludos cordiales,


Claudia Prezzi y Silvana Spagnotto


  • 2nd Circular - VII CosmoSul - Cosmology and Gravitation in the Southern Cone

Dear Colleagues,

The VII CosmoSul - Cosmology and Gravitation in the Southern Cone - will take place in Salvador, Brazil, from 19 to 23 August of this year, at the Federal University of Bahia, in a borough of beaches, hotels, and restaurants.

This event is the seventh edition of a biennial meeting whose previous editions occurred in Rio de Janeiro, Valparaíso, Córdoba, and São Paulo. The conference, usually attended by around a hundred researchers, pos-docs, and PhD students, intends to join people from Brazil, Argentina, Chile, Uruguay, and other countries of South America working in Cosmology, Gravitation, and Astrophysics.

The deadline for registrations and talk submissions has been extended to 21 June. In the webpage below you can find information about the plenary talks, the meeting place, and hotels:

For any further information, please write to

On behalf of the Scientific and Organising committees,

Rodrigo von Marttens (chair)

Scientific Committee:

Jailson Alcaniz, Brazil

Saulo Carneiro, Brazil

Julio Fabris, Brazil

Rodolfo Gambini, Uruguay

Ramón Herrera, Chile

Gilberto Kremer, Brazil

Susana Landau, Argentina

Osvaldo Moreschi, Argentina

Joel Saavedra, Chile

Winfried Zimdahl, Brazil

2da Circular


  • V VISCACHA & friends meeting

Dear colleagues,

We are pleased to announce that the V VISCACHA & friends meeting will take place at Universidad de La Serena, La Serena, Chile from 1-6 September 2024.

The VISCACHA survey ( is an ongoing scientific project involving researchers from Chile, Brazil, Argentina, México, United States and Poland, aimed at studying star clusters in the Large and Small Magellanic Clouds (LMC and SMC), using SOAR and Gemini-S telescopes. The past four editions of the meeting occurred in a format reserved only for VISCACHA members. This year, we want to open the doors and extend our invitation to the general academic public. This edition is also special since it will be our first meeting held in Chile.

The meeting is planned to have talks (no posters) and one or two round table discussions during the first three days (open to the general academic public) and sprint sessions the last two days (reserved for members of the collaboration). The first half of the event will have invited and contributed talks from VISCACHA members and other international scientists, covering topics such as:

-Chemical evolution of the Magellanic Clouds

-Structure and dynamics of the Magellanic Clouds

-Stellar and star cluster evolution

-Interaction of the Magellanic Clouds with the Milky Way

We have also organized a visit to Cerro Pachón, where the telescopes are situated, and a closing "Star Party" on Friday night to observe the Magellanic Clouds.

Below you will find more relevant information. Do not hesitate to write to us if you have any questions.

I hope to see you in La Serena!!!

Celeste Parisi, on behalf of the LOC.

Important dates 

01/Jul: Abstract submission and registration deadline

12/Jul: Programme release

01/Sep: Meeting starts.


The registration and abstract submission is already open. Complete the form on the event website:  

The registration fee is CLP 30000 for undergraduate or masters students, CLP 55000 for PhD students, CLP 75000 for post-docs, CLP 110000 for faculty. For non-members of the VISCACHA collaboration, the registration fee is according to their category plus CLP 10000 extra. The registration fee must be paid upon arrival. We will receive requests for waivers of the registration fee in the registration form. We will do our best to accommodate them according to the availability of funds for the event.

SOC members 

Alexandre Roman-Lopes (Universidad de La Serena, Chile)

Bruno Dias (Universidad Andrés Bello, Chile), Co-Chair

Elisa Garro (European Southern Observatory, Chile)

Francisco Maia (Universidade Federal do Rio de Janeiro, Brazil), Co-Chair

Gustavo Baume (Universidad Nacional de La Plata, Argentina)

Raphael Oliveira (University of Warsaw, Polonia)

LOC members 

Alexandre Roman-Lopes (Universidad de La Serena, Chile), Co-Chair

Amelia Ramirez (Universidad de La Serena, Chile)

Bernardo Pereira (Universidade Federal de Minas Gerais, Brazil)

Celeste Parisi (Universidad Nacional de Córdoba and IATE, Argentina), Co-Chair

Doug Geisler (Universidad de La Serena and Universidad de Concepción, Chile)

José Fernandez Trincado (Universidad Católica del Norte, Chile)


Please write to


  • GGOS Topical Meeting on the Atmosphere, October 7-9, 2024, Potsdam, Germany

Dear Colleagues,

The GGOS Topical Meeting on the Atmosphere will bring together outstanding colleagues from the International Association of Geodesy (IAG) and the International Association of Geomagnetism and Aeronomy (IAGA) to integrate geodetic and geophysical technologies for comprehensive monitoring of the atmosphere (troposphere, stratosphere, mesosphere, thermosphere, ionosphere/plasmasphere) and the magnetosphere.

The meeting will take place from 7 to 9 October 2024 in Potsdam, Germany. Participation is free (no registration fee), but pre-registration is required to ensure room capacity. Participants are invited to submit their papers to the journal Advances in Space Research (ASR), Special Issue: Ionospheric Imaging: Recent Advances and Future Directions.

Thanks to the support of the International Union of Geodesy and Geophysics (IUGG), IAGA and IAG, we will be able to provide some financial support to early career scientists and colleagues from developing countries who wish to present their research at the meeting. All details are available at

Important dates

Travel Award application deadline, July 15
Travel Award notification, July 31
Abstract submission deadline, July 31
Abstract acceptance notification, August 15
Schedule and conference program, August 31
Pre-registration deadline, August 31
List of participants, September 5
GGOS Topical Meeting, October 7 - 9

Don't miss this opportunity to network with colleagues who are at the forefront of cross-cutting research in this important area.

Best regards,

Laura Sánchez, GGOS President

Martin Sehnal, Director of the GGOS Coordinating Office



  • First announcement: DDAYS LAC 2024

Fecha: 9 al 13 de diciembre de 2024, Buenos Aires.

Primera Circular


  • DR4 y Proyecto Zoouniverse Citizen Science de S-PLUS

Hola a tod@s:

Por este medio quisiera ponerl@s en conocimiento de la cuarta liberación de datos (DR4) y del proyecto Zoouniverse Citizen Science de la colaboración S-PLUS.

Toda la informacion sobre la liberación de datos la pueden encontrar en el siguiente enlace: 

Toda la informacion relacionada al proyecto Zoouniverse Citizen Science la pueden encontrar en:

Home Page Zoouniverse
Science Hunter project:

Cualquier consulta, no duden en escribirme.



Dra. Analia Smith Castelli
Investigadora Independiente - CONICET
Grupo ALAS
Instituto de Astrofisica de La Plata, UNLP-CONICET
Facultad de Ciencias Astronomicas y Geofisicas, UNLP
Paseo del Bosque s/n, La Plata, Buenos Aires, Argentina (B1900FWA)
phone: +54 221 4236593 int. 1117


  • Electromagnetic Induction Workshop (EMIW)

Primera circular


  • Historia de la Astronomía

Se ha agregado una nueva entrada en Historia de la Astronomía en el siguiente enlace: 



Actualizado el 19/06/2024