Hello,
this is the first announcement of the Meeting  Hunting the missing
baryons: Current view and future prospects, please circulate it in your
institutes and to the people that can be interested.

On behalf of the LOC and the SOC
Nico Cappelluti

Meeting Announcement:
Cervia Milano Marittima, Italy
Organized by INAF-Osservatorio Astronomico di Bologna
May 27-30/2012
Website: www.oabo.inaf.it/baryons2012

 1st circular
"Whereabout, Physical State and Metallicity of the Missing Baryons in the
Local Universe"
Baryons in the local Universe are missing at all scales: from galaxies to 
their immediate surroundings, to the large scale structure concentrations
and their outskirts, up to the intergalactic space. The majority of what
we think is missing from the estimated baryon budget or the measured
universal non-baryonic over baryonic mass ratio, is probably only hard to
be seen, because of the high ionization state of these baryons, their
low-density, low metallicity or all of the above. Understanding the
physics of the feedback mechanisms at work, between structures and of
structures with their surroundings, is therefore critical to refine
simulations and theoretical models, and so to increase the power of
theoretical predictions. This in turn allows the development of more
targeted hunting campaigns and observational strategies aimed to finally
locate these missing baryons.

Over the past decade, and thanks to the advent of new instrumentation,
significant progresses have been made. We now know, for example, that a
significant amount of highly ionized and metal-enriched gaseous matter
surrounds our own Galaxy, and that a significant fraction (about 20%) of
the baryons in the local Universe are found in OVI or broad Lya absorbers,
tracing collisionally ionized matter in the intergalactic space.
How close to galaxies and galaxy structures this metal-enriched
intergalactic matter is, and whether is fundamentally made of primordial
enriched gas, or recycled from galaxies is still matter of debate.
Analogously the vast majority of the probably hotter matter in the
Universe still remains elusive.

This workshop aims to gather together experts in the field, to discuss the
newest results on the open hunt of missing baryons at all scales, and put
them into context, with the goals of
(a)updating the observed Universe baryon budget, and
(b)(b) define optimal observational and theoretical strategies that will
allow the community to significantly move forward

We invite to submit abstracts on the following theory and observational
topics:

- Photo-ionized Baryons in the local IGM: residual Lya/metal forest at z<2
- Shock-heated baryons in the local IGM: BLA/metal WHIM
-Shock-heated baryons in the local IGM: X-ray WHIM
- Baryons in-and-around galaxies and correlation with baryons in the IGM
- Baryons in the hot halo/corona of the Milky Way and the Local Group
- Baryons in the outskirts of galaxy groups and clusters
- New instrumentation to hunt  the missing baryons

The workshop will be based on invited  (30 min) and contributed talks
(15+5 min).
The list of invited speakers  will soon be circulated.


Relavant Dates:

Abstract Submission: March, 20, 2012
Early Registration: April 30
Hotel Booking: April 30

LOC

Nico Cappelluti (chair)

M. Roncarelli

    P.Ranalli

    A.Comastri

    C.Vignali

    S.Ettori

SOC

F. Nicastro (chair)

S. Borgani

L. Piro

N. Cappelluti

    S.Mathur

E. Branchini

    J.Bland-Hawthorn

R. Davé

J. W. den Herder

T. Ohashi

A. Finoguenov


For any inquiry: baryons@oabo.inaf.it