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.
Mon, JUL 15, 2019 @ 11:30 AM-- EXTRA SEMINAR
SPEAKER: Stefania Barsanti (Macquarie University, Sydney, AU)
TITLE: The SAMI galaxy survey: bulge and disk properties of cluster galaxies
ABSTRACT: The formation of lenticular galaxies is still a deep mystery and conflicting results are found in the literature regarding their origin: Johnston et al. (2014) observed younger stellar populations in bulges of cluster lenticular galaxies than those in the disks, while Head et al. (2014) observed that the bulges are generally older than the disk components. The method used by Johnston et al. (2014) consists of decomposing long-slit spectroscopic data to build separated one-dimensional spectra of the bulge and the disk, while Head et al. (2014) performed 2D photometric bulge-disk decomposition in multiple bands and analysed the colours. In this context, the study of more than 800 cluster galaxies from the Sydney-AAO Multi-Object Integral field spectrograph (SAMI) galaxy survey offers a unique tool to resolve these discrepancies between the results and the methods. SAMI allows to combine the 2D photometric bulge-disk decomposition, performed in the g-, r- and i-bands using the new analysis packages ProFound and ProFit, with the information from the integral field spectroscopic data. In this talk, I will explain how disentangling the ages and metallicities of bulge and disk stellar populations sheds light on galaxy evolution and I will show some important preliminary findings.
Mon, JUL 15, 2019 @ 14:30 -- 2nd EXTRA SEMINAR OF THE DAY
SPEAKER: Eiichiro Komatsu (MPA-MPG, Garching bei München, DE)
TITLE: Mapping the large-scale structure of the Universe with emission-line galaxies from z=0.6 to 3.5: HETDEX and PFS
ABSTRACT: We describe two unique galaxy redshift surveys to map out the large-scale structure of the Universe from z=0.6 to 3.5. Both will use the prime focus of large-aperture telescopes for wide fields of view. One is HETDEX, the on-going survey on 10-m Hobby-Eberly Telescope in West Texas, and the other is PFS, the planned survey on 8.2-m Subaru Telescope in Hawaii. We use Lyman-alpha emitters (HETDEX) and [OII] emitters (PFS) for z=1.9-3.5 and 0.6-2.4, respectively. The HETDEX is a super unique, non-traditional survey: we use integral field unit spectrographs (IFUs) to do the first blind emission-line surveys in a cosmological volume, without pre-selecting objects by imaging surveys. The PFS will use the highly multiplexed robotic multi-object fibre spectrograph. We describe the motivation for the projects, science goals, survey designs, as well as the current status of both projects.
| COMING SEMINARS |
ORGANIZATION:
Seminar organizers:
Elena Mason: Questo indirizzo email è protetto dagli spambots. È necessario abilitare JavaScript per vederlo.
Valentina D'Odorico: Questo indirizzo email è protetto dagli spambots. È necessario abilitare JavaScript per vederlo.
Pierluigi Monaco: Questo indirizzo email è protetto dagli spambots. È necessario abilitare JavaScript per vederlo.
Seminar logistic:
Gabriella Schiulaz and Simonetta Fabrizio: Questo indirizzo email è protetto dagli spambots. È necessario abilitare JavaScript per vederlo.
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.
