Dr
Shashikiran Ganesh
(Physical Research Laboratory, Ahmedabad, India)
10/10/18, 9:50 AM
2.1. Data & Science with the Indo-Belgian telescopes
Invited Review
Access to 2 and 4m class telescopes and sophisticated instrumentation are one of the key points of the BINA collaboration. It is expected that like other fields, the field of solar system astronomy would also greatly benefit from observations carried out with these telescopes. In this review talk I will be highlighting some of the work carried out on similar telescopes elsewhere and the gap...
Mr
Bikram Pradhan
(University of Liège)
10/10/18, 10:30 AM
2.1. Data & Science with the Indo-Belgian telescopes
Contributed Talk
The size distribution of space debris is an important input to
risk analysis for current and future space missions. In preparation for
future observations with the zenith-pointing 4-m International Liquid
Mirror Telescope, the 1.3-m Devasthal Fast Optical Telescope was used to
gain experience with zenith-pointing observations and, serendipitously,
to detect, identify and characterize...
Prof.
Ram Sagar
(Indian Institute of Astrophysics)
10/10/18, 10:50 AM
2.2. Data & Science with the Indo-Belgian telescopes
Invited Review
Both India and Belgium have jointly established two 4 meter class optical telescopes at Devasthal, Nainital (Longitude = 79º 41' 04" E; Latitude = 29 º 21' 40" N; Altitude= 2450 m) located in central Himalayan region of Kumaon, Uttarakhand, India. After successful installation of the 3.6 meter modern new technology Devasthal Optical Telescope (DOT) in 2015, it was technically activated by...
Dr
Yogesh Joshi
(Scientist ARIES)
10/10/18, 11:50 AM
2.2. Data & Science with the Indo-Belgian telescopes
Contributed Talk
Recently, large catalogues of exoplanet and eclipsing binary candidates are reported in the Kepler archival data. In the framework of BINA, we therefore initiated a long-term project "Optical characterization and Radial velocity monitoring with Belgian and Indian Telescopes (ORBIT)" which focuses on ground-based photometric monitoring and high-resolution spectroscopic observations of selected...
Dr
Patricia Lampens
(Koninklijke Sterrenwacht van België)
10/10/18, 12:10 PM
2.2. Data & Science with the Indo-Belgian telescopes
Contributed Talk
The oEA stars are the former secondaries of evolved, semi-detached eclipsing binaries which are (still) undergoing mass transfer and form a newly detected class of pulsators close to the main sequence (Mkrtichian et al. 2002). Their unique feature consists of mass accretion onto the atmosphere of the pulsating star. Mass accretion affects the mass, radius, density as well as the star's...
Prof.
Harinder P. Singh
(University of Delhi)
10/10/18, 12:30 PM
2.2. Data & Science with the Indo-Belgian telescopes
Contributed Talk
We analyse the theoretical light curves of Cepheid and RR Lyrae variables at optical (UBVRI) and near-infrared (JKL) wavelengths using Fourier decomposition. A large number of models have been studied appropriate for galactic and magellanic cloud Cepheids and RR Lyraes. We discuss the variation of light-curve parameters with different compositions and mass-luminosity levels as a function of...
Dr
Soumen Mondal
(S. N. Bose National Centre for Basic Sciences)
10/10/18, 12:50 PM
2.2. Data & Science with the Indo-Belgian telescopes
Contributed Talk
Pre-main sequence (PMS) stars first came into the spotlight due to their photometric variable characteristics. Observational studies have been performed on exploring variability in young stars and the role of angular momentum in their stellar evolution. The variability in a PMS star is thought to be originated via various mechanisms like magnetically induced cool spots or magnetically...
Dr
Abhay Pratap Yadav
(University of Goettingen, Germany)
10/10/18, 2:30 PM
2.2. Data & Science with the Indo-Belgian telescopes
Contributed Talk
Spectroscopic and photometric variabilities have been noticed in several stars. The cause and responsible mechanism for such variabilities are not yet properly understood. Among the possible origins, radial and non-radial pulsations have been proposed as a cause of these variabilities. With the help of linear stability analysis, we have found several strong instabilities in models of massive...
Prof.
Anwesh Mazumdar
(Homi Bhabha Centre for Science Education)
10/10/18, 2:50 PM
2.2. Data & Science with the Indo-Belgian telescopes
Contributed Talk
Recent data from the NASA Kepler mission has provided a big boost to
asteroseismic studies of solar-type stars and red giants. It is now
possible to provide strict constraints to models of such
stars by comparing the observed frequencies with the theoretically
predicted ones. However, the seismic constraints are only useful when
the effective temperature (Teff) and surface metallicity...
Prof.
GOPAL KRISHNA
(ARIES, Nainital)
10/10/18, 3:10 PM
2.3. Data & Science with the Indo-Belgian telescopes
Contributed Talk
The talk will mainly focus on the variability patterns of active galactic nuclei (AGN), specially their subset (including quasars, BL Lacs, Seyfert galaxies) which manifests nuclear jets of nonthermal radiation boosted due to relativistic beaming. Many of their striking observational traits, particularly intensity variations have been extensively recorded across the electromagnetic spectrum,...
Dr
SACHINDRA NAIK
(PHYSICAL RESEARCH LABORATORY, AHMEDABAD, INDIA)
10/10/18, 3:40 PM
2.3. Data & Science with the Indo-Belgian telescopes
Contributed Talk
We present a detailed multi-frequency analysis of an intense monitoring programme of the Seyfert 1 galaxy NGC 4593 over a duration of nearly a month with the Swift observatory. We used 185 pointings to study the variability in six ultraviolet/optical and two soft (0.3-1.5 keV) and hard X-ray (1.5-10 keV) bands. The amplitude of the observed variability is found to decrease from high energy to...
Mr
BIJU KG
(WMO Arts \& Science college, Muttil, Kerala, India-673122)
10/10/18, 4:00 PM
2.3. Data & Science with the Indo-Belgian telescopes
Contributed Talk
We present the results of our radio, optical and infrared studies of Zwicky's Nonet, which is a compact group of nine merging galaxies, at the centre of the rich galaxy cluster A 407. Here, all the nine galaxies are packed within a radius of only 25 kpc, with the smallest projected separation between galaxy pair combinations is about 5 kpc. This group is found to be hosting a radio source 4C...
Mr
Pratik Dabhade
(IUCAA)
10/10/18, 4:40 PM
2.3. Data & Science with the Indo-Belgian telescopes
Contributed Talk
In this talk, we will present about Giant Radio Galaxies (GRGs) and highlight the importance of their studies and our efforts to solve major standing problems related to growth and evolution of GRGs and their host active galactic nucleus (AGN). They represent an extreme class of active galaxies which have linear sizes in the range of ~0.7 Mpc to 5 Mpc which places them among the largest single...
Dr
Dominique Sluse
(STAR Institute (U. Liège))
10/10/18, 5:00 PM
2.3. Data & Science with the Indo-Belgian telescopes
Contributed Talk
Strongly lensed quasars and active galactic nuclei (AGN), namely active galaxies that appear multiply imaged due to a foreground lensing galaxy, are exceptional astrophysical tools that may be used to probe the expansion rate of the Universe, study the evolution of galaxies and of their dark matter content over cosmic time, and zoom in into the structure of AGNs. We are entering a new era in...
Mr
Amit Kumar Mandal
(Indian Institute of Astrophysics, CHRIST(Deemed to be University), Bangalore)
10/10/18, 5:20 PM
2.3. Data & Science with the Indo-Belgian telescopes
Contributed Talk
Active galactic nuclei (AGN) are high luminosity sources powered by accretion of matter onto super-massive black holes (SMBHs). According to the unification model of AGN, the SMBH is surrounded by a dusty torus. It is difficult to study the extent of the dusty torus as the central region of AGN is not resolvable using any conventional imaging techniques available today. Though the current...
Mr
Rajesh Kumar Dubey
(Researcher and Principal)
10/10/18, 5:40 PM
2.3. Data & Science with the Indo-Belgian telescopes
Contributed Talk
Galaxy collision is an important event in astrophysics and opens doors for many unanswered questions. The collision between NGC 1232 with a dwarf galaxy or NGC 5256 is another example of merging of two galaxies. APR 256 is another example of merging of the two spiral galaxies. These collisions takes place for millions of years and the statistics changes with time. However, observations show...