Seminari


Seminars are organized jointly by the Trieste Astronomical Observatory (INAF/OATS) and the Astronomy Unit of the Physics Dept. of the Trieste University (UNI/TS). They usually take place on Wednesdays at 11:30, in the seminar room (Sala Ovale) of Villa Bazzoni in via Bazzoni 2, TS.

 
NEXT SEMINAR:   
 

Wed, MAY 23, 2018 
SPEAKER: Veronica Strazzullo (LMU, Munich, DE)
TITLE: Environmental quenching in the most massive galaxy clusters at z~1.5


ABSTRACT: I will present first results from a galaxy population study in the five most distant clusters identified in the South Pole Telescope Sunyaev Zel’dovich survey (SPT-SZ), based on a dedicated 4-band HST and Spitzer follow-up of the complete z>1.4 tail of the SPT-SZ cluster sample (z~1.4-1.7). The wide survey volume of SPT-SZ, and the cluster selection to first order independent of cluster galaxies, make this sample ideally suited for studying galaxy populations in the rarest, most massive (>4x10^14 Msun) clusters at the cosmic epoch bridging the formation of massive cluster galaxies at z>~2 with their passive evolution regime at z<1. Based on photometric classification of quiescent and star-forming galaxies, we measure quiescent galaxy fractions at high stellar masses log(M/Msun)>10.85 of >~ 80% in the cluster core, yielding environmental quenching efficiencies in the range ~0.5-0.8 in the inner r<0.5xr500 cluster region. Our results thus suggest that, at least in the central regions of the most massive clusters, the suppression of star formation in massive galaxies with respect to their field analogs already effciently occurs earlier than z~1.5.

contact: Alex Saro

&

Fri, MAY 25, 2018 @ 11:30 --- EXTRA SEMINAR 
SPEAKER: Jader Monari (INAF IRA, Villafontana - BO, IT)
TITLE: Installation of the SKA Aperture Array Verification 1


ABSTRACT: In this talk I will present AAVS1 (Aperture Array Verification 1), telling the vicissitudes of the INAF team during the first installation in Australia of the first prototype station with 256 antennas, in the missions held in March, August and November 2017. The installation was in the deep Australian outback in the Murchison region that is hosting the country for the Square Kilometer Array program, the low frequency radio telescope of the future, which will count at least 128,000 antennas distributed in 5000Kmq at the end of phase 1 of the program (2024). The presentation in Italian will be introduced by a general overview of the program with a surprise ending …

contact: Riccardo Smareglia

 

 
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ORGANIZATION:

Seminar organizers:
Elena Mason: This email address is being protected from spambots. You need JavaScript enabled to view it.
Valentina D'Odorico: This email address is being protected from spambots. You need JavaScript enabled to view it.
Pierluigi Monaco: This email address is being protected from spambots. You need JavaScript enabled to view it.

Seminar logistic:
Gabriella Schiulaz and Simonetta Fabrizio: This email address is being protected from spambots. You need JavaScript enabled to view it.

Should you wish to give a talk at OATS, please feel free to contact the organizers.
Should you be one of our next speakers and need any travel and/or logistic information, please contact our Seminar logistic.
Please find here the Speaker's Vademecum, in preparation for your coming visit at OATS.