Kiran S. Baliyan
Professor and Chairman,
Astronomy and Astrophysics Division
Physical Research Laboratory
Telephone: +91-79-2631-4509, 4757
My current research interests include:
- Optical and near-infrared study of AGNs
- Morphological study of the inner regions of the Milky way
- Optical photopolarimetric study of the cometary grains
- Electron /photon impact collision rates of atoms and ions
Variability in flux and polarization is used to understand the physical processes responsible for the extremely high energy emissions from the active galactic nuclei. The observations are made on blazars, a subclass of AGNs in which the emission is dominated by the radiation from the relativistic jet, using NICMOS-3 (near infrared), CCD and polarimeter (optical) mounted at the 1.2 m telescope of the Mt. Abu Infrared Observatory. In the study of the Milky way, attempts are being made to know the various stellar populations and detailed structure of the galaxy in the most obscurred inner regions. Mid infrared (ISOGAL), infrared (IRSF, South Africa) and optical (HCT, Hanle) observational data is being used for this purpose. Photopolarimetric observations are made on bright comets on their apparition in order to study their grain properties.
Future study will include, in addition to the above, high resolution imaging polarimetry of blazars to understand the magnetic field pattern which plays important role in the emission, collimation and acceleration processes. Modelling of the multifrequency emission to fit the observed data will help understand the relationhip between different emission components. Imaging and specroscopy capabilities of the new instruments, MFOSC and near IR array coupled with data from future missions- e.g AGILE, TAUVEX, are planned to be used for the study of blazars and inner regions of the Milky Way.
Here is link to my CV CLOUDS search for variability in brown dwarf atmospheres
Link to some useful AGN articles Optical polarimetry and photometry of comet 17P/Holmes,
- Rapid Optical Variability in Blazar S5 0716+71 During 2010 March,
S. Chandra, K.S. Baliyan, S. Ganesh & U C Joshi, ApJ
U.C. Joshi, S. Ganesh and K.S. Baliyan,
MNRAS 402, 2744, (2010).
B. Goldman, MC Cushings, MS Marley, E Artigau, K.S. Baliyan,
et al, AA, 487, 277, (2008).
Very high energy Gamma-ray and near infrared observations of 1ES2344+514 during 2004-05,
SV Godambe, RC Rannot, KS Baliyan, AK Tickoo et al, J.Phys G 34, 1683(2007).
Monitoring of the blazars from Mt Abu IR Observatory,
K.S. Baliyan, U.C. Joshi, S. Ganesh,
BASI, 33, 393, (2005).
Coordinated Multiwavelength Observation of 3C 66A during the WEBT Campaign of 2003-2004
M. Bottcher et al (62 co-authors including K.S. Baliyan,
ApJ, 631, 169, (2005).
Study of the Nuclear Bulge region of the Galaxy,
K.S. Baliyan, S. Ganesh, U.C. Joshi, I.S. Glass and T. Nagata,
Astro Nach., 324, 47, (2003).
ISOGAL:A deep survey of the obscured inner Milky way at 7 & 15 micron,
A. Omont, A. Gilmore, C. Alard, Aracil, August, K.S. Baliyan, U.C. Joshi, S. Ganesh et al,
A&A, 403, 975, (2003).
A morphological study of the Galactic Inner Bulge,
K.S. Baliyan, S. Ganesh, U.C. Joshi, A. Omont et al.,
Astro Nach., 324, 53, (2003).
Polarization studies of comet C/2000 WM1 (Linear)
U.C. Joshi K.S. Baliyan, S. Ganesh,
A&A, 405, 1125, (2003).
Polarimetric Study of Comets C/1995 O1 (Hale Bopp) and C/2000 WM1 (LINIEAR),
U.C. Joshi K.S. Baliyan, S. Ganesh,
Earth, Moon and Planets, 90, 413, (2002).
Multiwavelength study of the variability in blazars
K.S. Baliyan, Bull. Astron. Soc. of India, 29, 397, (2001).
Co-ordinated TeV gamma-ray and optical polarization study of BL Lac object Mkn 501,
U.C. Joshi K.S. Baliyan, S. Ganesh, M.R. Deshpande, S. Bhattacharya, R.K. Kaul, C.L. Kaul and C.L. Bhat,
BASI, 28, 409, (2000).
Polarization study of comet Hale Bopp,
S. Ganesh, U.C. Joshi K.S. Baliyan, and M.R. Deshpande,
Astron & Astrophys. Supp. 129, 489, (1998).
On the Variability Timescales and Magnetic Field in OJ 287,
K.S. Baliyan, U.C. Joshi and M.R. Deshpande,
Astrophys & Space Sc., 240, 195, (1996).
Oscillator strengths for the transitions in Ca XIII,
K.S. Baliyan, and A.K. Bhatia,
Phys. Rev. A 48, 250, (1993).
Photoionization of the 4So ground state of the N-like Cr17+ ion,
K.S. Baliyan, J. Phys. B 24, 2777, (1991).