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 The Fifth Workshop on Compact Steep Spectrum and GHz-Peaked
 Spectrum Radio Sources
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Workshop Location

The Institute of Radioastronomy (IRA - INAF) and the Department of
Physics and Astronomy (DIFA - UniBO) are organizing an international
workshop on GHz Peaked Spectrum (GPS) and Compact Steep Spectrum (CSS)
radio sources. The workshop will take place in Rimini (Adriatic coast,
Italy), 27 (Wednesday) through 29 May (Friday) 2015, at the Sporting
Hotel (http://www.hotelsportingrimini.com).
The plan is to have a full day meeting on the 27th and the 29th, and a
morning session on the 28th, to have the opportunity to visit a nearby
historical place in the afternoon of the 28th.

This workshop is the fifth in a series following the meetings in
Dwingeloo (1990), Leiden (1996), Kerastari (2002) and Riccione (2008).

Scientific Rationale

The GHz Peaked Spectrum (GPS) and Compact Steep Spectrum (CSS) radio
sources are the most likely candidates for the progenitors of the large
scale radio sources. They are powerful but compact radio sources whose
spectra are generally simple and convex with peaks near 1 GHz and 100
MHz respectively. In general, the GPS sources are entirely contained
within the extent of the narrow line region (< 1 kpc) while the CSS
sources are contained entirely within the host galaxy (< 15 kpc). The
GPS and CSS sources provide (1) probes of the ISM of the host galaxy,
and (2) constraints on the physics of radio galaxy evolution, and (3)
provide witness to a very short period of activity of an active galactic
nucleus (AGN).
As the radio plasma propagates outwards through the host galaxy, it
provides feedback in the form of strong shocks which may influence star
formation in the galaxy and further fuelling of the AGN, and definitely
influences/determines other radiative processes as observed in various
bands.

Substantial progress has been made in our understanding of GPS and CSS
sources through the combination of high resolution radio, optical and UV
imaging as well as IR and X-ray observations, and the availability of
GeV observations with the Fermi LAT. Recent work has extended samples of
sources to lower power and higher peak frequency. Dramatic improvements
to existing facilities (VLA, GMRT, VLBA) and a new generation of radio
telescopes (LOFAR, ALMA, and SKA precursors/pathfinders) are impacting
our understanding of these interesting sources. This workshop will bring
together observers from across the spectrum with theorists for an
informal and stimulating exchange of ideas and results.

Proceedings

The proceedings will appear in Astronomische Nachrichten, which is a
fully-refereed journal published both online and in paper form. Details
on paper submission will be given at the conference. A hard copy will be
sent to each participant.

Sponsors

Radionet, the National Institute for Astrophysics (INAF), the Institute
of Radioastronomy (IRA) and the Department of Physicis and Astronomy
(DIFA) will contribute to reduce the registration fee, in particular for
students, postdocs and those eligible for Radionet support.

Important dates

July 30th, 2014 : first announcement
September 15th, 2014: second announcement, with details on logistics and
costs; registration opens
December 15th, 2014: third announcement with invited speakers, scheme of
scientific program available (just topic of the various sessions)
April 15th, 2015: end of registration
April 22nd, 2015: assignment of poster/oral contribution
April 30th 2015: Final Announcement with scientific program of the
meeting, end of application of discounted fee for early payment.

Organizing Committees

SCIENTIFIC ORGANIZING COMMITTEE:

Chris O'Dea (RIT, co-chair)
Daniele Dallacasa (IRA, co-chair)
Teddy Cheung (NRL)
Magdalena Kunert-Bajraszewska (U Torun)
Motoki Kino (KASI)
Raffaella Morganti (ASTRON)
Aneta Siemiginowska (CfA)
Lukasz Stawarz (ISAS)
Greg Taylor (UNM)

LOCAL ORGANIZING COMMITTEE:

Daniele Dallacasa (chair)
Karl Heinz Mack
Barbara Neri (secretary)
Matteo Stagni