Dr
Emmanuel Jehin
(STAR Institute - University of Liège)
10/11/18, 9:30 AM
3.1. Data & Science with other telescopes of interest
Invited Review
Comets, asteroids and transneptunien objects are remnants of the early stages of the Solar system and, likely, the most pristine solar system bodies. Understanding their nature and their evolution is a clue to the history of our Solar System and panet formation. Comets and meteorites contain complex organic molecules, and may have played a key role in the transfer of water and organics from...
Prof.
Anandmayee Tej
(Indian Institute of Space Science and Technology, Thiruvananthapuram, India)
10/11/18, 10:10 AM
3.2. Data & Science with other telescopes of interest
Invited Review
We have started a programme with Giant Metrewave Radio Telescope (GMRT) to survey the Cygnus OB2 region at 325 and 610 MHz. The Cygnus OB2 region is rich with a wide variety of sources across the electromagnetic spectrum such as protostars, young massive stars, X-ray sources, unidentified VHE sources, colliding wind binaries, shells, bubbles, shocks, etc. Frequencies below 1 GHz trace the...
Dr
Kaushal Sharma
(Inter University Centre for Astronomy and Astrophysics)
10/11/18, 10:50 AM
3.2. Data & Science with other telescopes of interest
Contributed Talk
We propose an automated approach for the classification of stellar spectra using Deep Neural Networks. Due to the ever-expanding volume of observed spectroscopic data from surveys such as SDSS and LAMOST, it has become important to apply artificial intelligence (AI) techniques for analysing stellar spectra to solve spectral classification and regression problems like the determination of...
Dr
Subhajeet Karmakar
(Aryabhatta Research Institute of Observational Sciences (ARIES))
10/11/18, 11:30 AM
3.2. Data & Science with other telescopes of interest
Contributed Talk
Solar-type stars with a similar internal structure to that of the Sun (spectral type from late-F to early-M) are supposed to operate a similar type of dynamo mechanism. However, the observations of these stars have introduced a range of stellar rotation periods, gravities, masses, and ages, which put into the debate on the existing magnetic dynamo theory. In order to provide useful constraints...
Girish V
(ISRO)
10/11/18, 11:50 AM
3.2. Data & Science with other telescopes of interest
Contributed Talk
AstroSat, India’s first dedicated astronomy mission has successfully completed its third year in orbit. The AstroSat observatory carries five astronomy payloads covering from ultraviolet to soft/medium energies to hard X-rays. The data from AstroSat has led to several new scientific results like X-ray polarisation using the Cadmium Zinc Telluride Imager (CZTI) and solving of a twenty years...
Dr
Stalin Chelliah Subramonian
(Indian Institute of Astrophysics, Bangalore)
10/11/18, 12:10 PM
3.2. Data & Science with other telescopes of interest
Contributed Talk
The UltraViolet Imaging Telescope (UVIT) is one of the scientific payloads on board India's first multi-wavelength astronomical satellite AstroSat launched by the Indian Space Research Organisation on 28 September 2015. Along with UVIT and other X-ray instruments, AstroSat has the unique capability of simultaneously imaging a celestial source from the ultraviolet to the hard X-ray band. UVIT...
Dr
Eugene Semenko
(Special Astrophysical Observatory, Nizhnii Arkhyz, Russia)
10/11/18, 12:30 PM
3.2. Data & Science with other telescopes of interest
Contributed Talk
This talk reviews the results of a spectroscopic study of two pulsating A-stars. HD 118660 was known as a photometric variable star whose physical properties had been studied with the use of spectroscopy from the Russian 6-m Большой Телескоп Альт-азимутальный (BTA). Here, we present the direct spectroscopic confirmation of the pulsational nature of the star and outline the requirements for the...
Prof.
Aruna Goswami
(Indian Institute of Astrophysics, Bangalore)
10/12/18, 9:30 AM
3.2. Data & Science with other telescopes of interest
Contributed Talk
The Himalayan Chandra Telescope (HCT), Indian Astronomical Observatory (IAO), Hanle, India, has entered its 15th year of operation. Over the years, various observational programs have been carried out leading to a large number of publications. A brief overview of stellar and galactic studies carried out using HCT and its back end instruments such as the Himalaya Faint Object Spectrograph...
Prof.
Aruna Goswami
(Associate professor)
10/12/18, 9:50 AM
3.2. Data & Science with other telescopes of interest
Contributed Talk
The halo system of the Milky Way comprises the vast majority of the presently observed metal-poor ([Fe/H]< -1.0) and very metal-poor ([Fe/H] < -2.0) stars. Among these metal-poor stars, a sizable fraction (~30%) show carbon enhancement ([C/Fe] > 1.0). These stars are called Carbon-Enhanced Metal-Poor (CEMP) stars. Studies of these objects are of special interest, since they bear the fossil...
Ms
Shejeelammal J
(Student)
10/12/18, 10:10 AM
3.2. Data & Science with other telescopes of interest
Contributed Talk
The origin and evolution of neutron-capture elements in our Galaxy is poorly understood. Detailed chemical composition analysis of stars with the atmosphere enriched by these elements can throw light on the Galactic chemical evolution history. Metal-deficient Ba stars form useful candidates for this kind of studies. They are mostly in their main-sequence and giant phase of stellar evolution...
Prof.
Anandmayee Tej
(Indian Institute of Space Science and Technology, Thiruvananthapuram, India)
10/12/18, 10:30 AM
3.2. Data & Science with other telescopes of interest
Contributed Talk
The formation of high-mass stars remains an enigmatic process. Through a multi-wavelength study of G12.42+0.50, designated as an outflow source, we probe the various associated components that shed crucial light on the processes involved in the early phases of massive star formation. We present the first low-frequency radio observations of this source and attempt to reveal the nature of this...
Prof.
Anandmayee Tej
(Indian Institute of Space Science and Technology, Thiruvananthapuram, India)
10/12/18, 10:50 AM
3.2. Data & Science with other telescopes of interest
Contributed Talk
An investigation in radio and infrared wavelengths of two high-mass star-forming regions toward the southern Galactic bubble S10 is presented in this work. The two regions under study are associated with the broken bubble S10 and Extended Green Object, G345.99-0.02, respectively. Radio continuum emission mapped at 610 and 1280 MHz using the Giant Metrewave Radio Telescope, India, is detected...
Ms
ARTI JOSHI
(Aryabhatta Research Institute of observational sciencES (ARIES))
10/12/18, 11:30 AM
3.2. Data & Science with other telescopes of interest
Contributed Talk
We present analyses of optical (photometric and spectroscopic) data obtained from 1-m class telescopes at ARIES (Nainital) and the 2.01-m Himalayan Chandra Telescope (HCT) at Indian Astronomical Observatory (IAO), Hanle, India, for three candidate polars namely RX J0859.1+0537, RX J0749.1-0549, and RX J0649-0737. An analysis of X-ray data obtained from the ROSAT satellite is also presented....
Dr
Santosh Joshi
(ARIES, Nainital)
10/12/18, 11:50 AM
3.2. Data & Science with other telescopes of interest
Contributed Talk
A survey project called the “Nainital-Cape Survey” was started in the late 1990s with the aim to search and study pulsation in Ap & Am stars using the observing facilities from Nainital and Cape Town. This ongoing survey programme has monitored so far more than 350 stars and has discovered pulsation variability in one roAp and seven Delta Scuti stars. Recently, we obtained time-series PMT...
Dr
David Mkrtichian
(NARIT)
10/12/18, 12:10 PM
3.2. Data & Science with other telescopes of interest
Contributed Talk
I will give a review on pulsation properties of the group of mass-accreting components of Algols (oEA stars). I will discuss the importance of detection of high-degree nonradial pulsations (NRP). The precise monitoring of frequencies of high-degree NRPs allows tracking the micro-variations (acceleration and braking) of the surface layers of oEA stars under high mass-transfer events. I will...
Dr
Michaël De Becker
(STAR, Liège University)
10/12/18, 12:30 PM
3.2. Data & Science with other telescopes of interest
Contributed Talk
Synchrotron radiation identified in the radio domain for several tens of binary systems made of massive stars provides compelling evidence that a particle acceleration process is at work in these objects, hence their Particle-Accelerating Colliding-Wind Binaries (PACWB) status. Measurements of the synchrotron radio emission allow to investigate the non-thermal physics and to derive some of...
Dr
Soumen Mondal
(S. N. Bose National Centre for Basic Sciences)
10/12/18, 12:50 PM
3.2. Data & Science with other telescopes of interest
Contributed Talk
A sample of young M-dwarfs from young moving groups and old population from the galactic field is observed using the near-infrared TIRSPEC instrument (R=1200) on the 2-m Himalayan Chandra Telescope (HCT) at Hanle. Using interferometrically measured effective temperatures, radii, luminosities of a sample of calibrators with spectral type ranging from M0 V to M6 V, we have developed modified...
Prof.
Maarten Baes
(Universiteit Gent)
10/12/18, 2:30 PM
3.3. Data & Science with other telescopes of interest
Invited Review
Galaxies are generally considered as the basic building blocks of the Universe. Besides stars, galaxies also contain a multi-phase interstellar medium that consists of molecules, atoms, ions, and dust grains. A global picture of the structure, formation, and evolution of galaxies requires observations of all these different components, and hence a multi-wavelength approach. We will describe...
Ms
Marjorie Decleir
(Universiteit Gent)
10/12/18, 3:10 PM
3.3. Data & Science with other telescopes of interest
Contributed Talk
Dust attenuation is a crucial but highly uncertain parameter that hampers the determination of intrinsic galaxy properties, such as stellar masses, star formation rates and star formation histories. The shape of the dust attenuation law is not expected to be uniform between galaxies, nor within a galaxy. Our DustKING project was introduced at the first BINA workshop in 2016 and studies the...
Dr
Alok Chandra Gupta
(ARIES, Nainital, India)
10/12/18, 3:30 PM
3.3. Data & Science with other telescopes of interest
Contributed Talk
Blazar is a sub-class of radio loud active galactic nuclei (AGN). Blazars show large amplitude flux and polarization variability in the complete electromagnetic spectrum and emission being pre-dominantly nonthermal. Occasionally quasi-periodic oscillations (QPOs) are also reported in blazars time series data. In the talk, I will discuss about our recent results obtained using multi-wavelength...
