This is the second announcement of the IAU symposium 356 on ‘Nuclear
Activity in Galaxies Across Cosmic Time’, to be held in Addis Ababa in
Ethiopia, from October 7 – 11, 2019. We apologise if you received this
information multiple times. Please take a note that deadline for
abstract submission is next Tuesday 30 of April.

This is only the third symposium to be held in Africa in the past 100
years of the IAU. Currently many African countries are putting huge
efforts in developing astronomy and space science for their long-term
socioeconomic benefits. Therefore, beside revising the physics behind
AGN, another important aim of the IAU 356 symposium is to contribute to
the development of astronomy in Ethiopia and Africa in general. Please
help us in achieving these aims, by coming to the meeting and sharing
your knowledge and experience, and by
forwarding this information in your research centres and within your
colleagues.

Many thanks in advance, and we are looking forward to host you in
Ethiopia.

Best wishes, and have a nice day,

Mirjana Mpovic
on behalf of organisers

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Second announcement
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IAU symposium 356:
Nuclear Activity in Galaxies Across Cosmic Time
http://iau356.essti.gov.et/
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7 – 11 October 2019, Addis Ababa, Ethiopia
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ABSTRACT SUBMISSION DEADLINE: April 30

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SUMMARISED RATIONALE:
With this conference we would like to achieve two main goals. First, we
want to provide a general overview of recent findings and progress in
observations, simulations, and theory of AGN from the local universe up
to high redshifts. This includes the following questions:

1. What have we learnt from AGN multiwavelength studies and what can we
expect from future instruments such as eROSITA, JWST, Euclid, CTA, SKA,
E-ELT, Athena, etc.?

2. What is the current status of the unification model of AGN? What are
the components distinguishing type-1 and type-2 AGN?

3. What do we know about AGN host galaxies? What is the effect of AGN on
their host galaxy and how important is AGN feedback compared with
stellar feedback in the context of preserving (or not) SMBH scaling
relationships at low and high redshift?

4. What is the status of AGN theory and numerical simulations regarding
AGN triggering, including mergers and secular processes, AGN disks, AGN
outflows and the shutting off of AGN activity?

5. How well we understand the origin of jets and their impact on galaxy
evolution? What evidences do we have for AGN positive and negative
feedback across cosmic time? In what kind of environments AGN reside?

6. How precisely can we measure BH mass at different redshifts?

7. What are the properties of highest-redshift AGN? What do we know
about AGN evolution?
Secondly, we aim at strengthening the development of science in Ethiopia
and Africa and opening new space for collaborations between Africa and
other parts of the globe for the benefit of all.

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KEY TOPICS
– Multiwavelength AGN surveys: past, present, and future
– AGN types and unification
– Variability
– Active black holes and their host galaxies
– Triggering, feedback and shutting off AGN activity
– Jets and environment
– Highest redshift AGN and AGN evolution

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IMPORTANT DATES
– Abstract submission deadline: 30 April 2019
– Regular registration closed: 01 September 2019

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ADDITIONAL ACTIVITIES
Students training, outreach activities, and teachers training will be
organised before, during, and after symposium, respectively, by
conference experts.

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INVITED SPEAKERS
– Niel Brandt (Penn State University, USA)
– Claudio Ricci (Universidad Diego Portales, Chile)
– Paulina Lira (Universidad de Chile, Chile)
– Petri Vaisanen (SALT-SAAO, South Africa)
– Francoise Combes (Observatoire de Paris, France)
– Raffaella Morganti (ASTRON, Netherlands)
– Benny Trakhtenbrot (Tel Aviv University, Israel)

Discussions will be organised after each session, and will be summarised
and chaired by SOC members

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SOC
– Mirjana Pović (ESSTI, Ethiopia) – chair
– Paola Marziani (INAF, Italy) – co-chair
– Hagai Netzer (Tel Aviv University, Israel) – co-chair
– Pheneas Nkundabakura (University of Rwanda, Rwanda) – co-chair
– Isabel Márquez (IAA-CSIC, Spain)
– Miguel Sánchez Portal (IRAM, Spain)
– Vincenzo Mainieri (ESO, Germany)
– Sylvain Veilleux (University of Maryland, USA)
– Itziar Aretxaga (INAOE, Mexico)
– Andrew C. Fabian (University of Cambridge, UK)
– Mara Salvato (MPE, Germany)
– Lisa J. Kewley (Australian National University, Australia)
– Jian-Min Wang (Institute of High Energy Physics – CAS, China)
– Prajval Shastri (Indian Institute of Astrophysics, India)
– Bradley M. Peterson (STScI, USA)
– Nebiha Shafi (HartRAO, South Africa)
– Bililign T. Dullo (Universidad Compultense de Madrid, Spain)

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LOC
– Mirjana Pović (ESSTI) – chair
– Solomon Tessema Belay (ESSTI) – co-chair
– Alemiye Mamo Yacob (ESSTI) – co-chair
– Jerusalem Tamirat (ESSTI) – co-chair
– Feleke Zerihun (ESSTI) – co-chair
– Josefa Masegosa (IAA-CSIC, Spain) – co-chair
– Getachew Wollel (ESSTI)
– Mekbeb Tamrat (ESSTI)
– Sebhat Tadesse (ESSTI)
– Daniel Fikadu (ESSTI)
– Fraol Lenjisa (ESSTI)
– Biruk Abrham (ESSTI)
– Dugasa Belay (ESSTI)
– Alazar Seyoum (ESSTI)
– Eyoas Ergetu (ESSTI)
– Christopher D. Impey (University of Arizona, USA)
– Getinet Feleke (Kotebe Metropolitan University and ESSTI)
– Etsegenet Getachew (ESSTI)
– Zeleke Amado Beyoro (Kotebe Metropolitan University and ESSTI)
– Tilahun Getachew Woreta (Bule Hora University and ESSTI)
– Shimeles Terefe (Jimma University and ESSTI)
– Betelehem Bilata (Debre Birhan University and ESSTI)
– Tolu Biressa (Jimma University)

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GENDER/GEOGRAPHICAL BALANCE, AND CHILD CARE
We will strongly try to achieve 50% – 50% of female – male participation
in
all parts of symposium organisation, and will take a special care to
have
participation of experts from all geographical locations. Child care
will be provided.

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For more information, registration, and abstract submission see
http://iau356.essti.gov.et/