PL EN


Program spotkania dnia 8 kwietnia 2019 r.

CAMK PAN, godz. 11.00, Sala Seminaryjna

10:30 - 11:00 Kawa, herbata itd.
11:00 - 11:05 Przywitanie
11:05 - 11:35 J. Mikołajewska K. Iłkiewicz Późne fazy ewolucji gwiazd podwójnych
11:35 - 12:00 C. Gałan HRS monitoring of yellow symbiotic systems
I will tell about our program of monitoring of so called yellow symbiotic systems (SySt) during two last SALT seasons. We proposed to obtain high resolution (R~40000; S/N~>50) spectra for two dozens of yellow SySt using HRS spectrograph in MR mode. The aim is to use HRS spectra for the radial velocity monitoring and to study chemical composition. Abundances will be measured using the spectral synthesis employing the method of standard LTE analysis. We will look also for possible abundance anomalies due to, e.g., former mass transfer pollution. We expect to obtain new information about orbital parameters of these systems. Using it together with new Gaia DR2 distances we are going to revise and put new constraints on the physical parameters (temperature, luminosity, abundances) of these giants. It seems be very likely that these objects may turn out to have significantly larger diameters, and so be located at longer distances, be significantly colder and more luminous – the bright giants rather than a normal giants.
12:00 - 12:30 B. Czerny, K. Hryniewicz Dark Energy test with quasar monitoring
12:30 - 12:45 R. Smiljanic Follow-up of interesting binaries and multiple systems discovered by the Gaia-ESO Survey
The Gaia-ESO Large Spectroscopic Survey conducted with FLAMES at the Very Large Telescope has proven extremely relevant for binarity/multiplicity investigations because its selection biases are well-constrained. It has led to the detection of a large number of possible spectroscopic binaries and multiple systems. More than 98% of them are new candidates. Recently, we started a program to follow-up some of the candidates, focusing on the very rare multiple objects (including one SB4 and a few SB3 candidates). In this talk, we present the sample being observed and preliminary results for the SB4 candidate.
12:35 - 13:00 G. Handler TESSting the interior structures of supernova progenitors
13:00 - 14:00 Obiad
14.00 - 14.20 M. Hajduk Wyznaczanie zmian temperatury gwiazd centralnych mgławic planetarnych za pomocą widm z teleskopu SALT
Mgławice planetarne powstają z gwiazd o masach poczatkowych 1–8 Msun. Po opuszczeniu asymptotycznej gałezi olbrzymów gwiazdy te ewoluują niezwykle szybko. W krótkim czasie ich temperatura rośnie o czynnik 20 lub większy, od około 5000 K do powyżej 100,000 K, zaś promień kurczy się o trzy rzędy wielkości przy stałej dzielności promieniowania. Następnie gwiazda osiada na torze stygnących białych karłów. Ewolucję gwiazdy można obserwować porównując stosunki strumieni linii mgławicowych czułych na temperaturę zmierzone w odpowiednim odstępie czasu. W przypadku gwiazd centralnych z silnymi wiatrami gwiazdowymi typu [WC] wyznacznikiem zmian temperatury mogą być linie gwiazdowe. Do badań wykorzystałem widma z teleskopu SALT zebrane na dwóch instrumentach, RSS oraz HRS.
14.20 - 14.40 P. Guzik, M. Drahus Early results from the rst dedicated search for asteroid dust trails with SALTICAM
One of the most remarkable advances in Solar System science over the past decade is the direct observation of asteroidal disruptions. The most striking phenomenon associated with the disruption is the formation of a dust trail along the body's orbit. The trail can be observed for many years, as showed by the studies of two recently disrupted asteroids, P/2010 A2 and P/2012 F5. We argue that a dedicated survey with a large telescope can possibly detect much fainter (thus older) trails - precious remnants from historical disruptions - thereby providing basis for detailed research into the causes of the disruption. A pilot survey has been recently initiated by our team at SALT, with the first results already appearing. At the time of writing, we have successfully detected the known ultra-faint trail of the disrupted asteroid P/2012 F5 - proving the concept in terms of technical feasibility. I will present the main science goals of the survey, discuss the early results from the pilot phase, and draw conclusions for the anticipated full phase.
14:40 - 15:00 T. Kwiatkowski Photometry and spectroscopy of asteroids
15:00 - 15:15 A. Pollo Podsumowanie Kraków
15:15 - 15:30 A. Słowikowska Podsumowanie Toruń
15:30 - 15:45 G. Kopacki Wroclawskie projekty obserwacyjne SALT'a
15:45 - 16:00 W. Pych, M. Sarna Podsumowanie SALT
16:00 - 17:00 A. Kryszczyńska, P. Życki, wszyscy Dyskusja na temat: perspektywy na przyszłość