Search Publications
Identifying Li-rich giants from low-resolution spectroscopic survey
Zhao, Gang; Kumar, Yerra Bharat; Reddy, Bacham Eswar
In this paper we discuss our choice of a large unbiased sample used for the survey of red giant branch stars for finding Li-rich K giants, and the method used for identifying Li-rich candidates using low-resolution spectra. The sample has 2000 giants within a mass range of 0.8 to
Stellar parameters of the two binary systems: HIP 14075 and HIP 14230
Al-Wardat, Mashhoor A.; Pathan, J. M.; Masda, Suhail G.
We present the stellar parameters of the individual components of the two old close binary systems HIP 14075 and HIP 14230 using synthetic photometric analysis. These parameters are accurately calculated based on the best match between the synthetic photometric results within three different photometric systems with the observed photometry of the …
Measurement of coronal properties of Seyfert galaxies from NuSTAR's hard X-ray spectrum
Stalin, C. S.; Rani, Priyanka
Precise measurement of the coronal properties of Active Galactic Nuclei (AGN) requires the availability of high signal-to-noise ratio data covering a wide range of X-ray energies. The Nuclear Spectroscopic Telescope Array (NuSTAR) which is highly sensitive to earlier missions in its operational energy range of 3–79 keV, allows us to arrive at prec…
Suzaku observation of the eclipsing high mass X-ray binary pulsar XTE J1855-026
Paul, Biswajit; Devasia, Jincy
We report results from analysis performed on an eclipsing supergiant high mass X-ray binary pulsar XTE J1855-026 observed with the X-ray Imaging Spectrometer (XIS) on-board Suzaku Observatory in April 2015. Suzaku observed this source for a total effective exposure of
Dust color temperature distribution of two FIR cavities at IRIS and AKARI maps
Jha, A. K.; Aryal, B.
By systematically searching the region of far infrared loops, we found a number of huge cavity-like dust structures at
Short timescale UV variability study in NGC 4151 using IUE data
Doddamani, Vijayakumar H.; Vedavathi, P.
IUE has made very successful long term and intense short time-scale monitoring spectroscopic study of NGC 4151, a Seyfert 1 galaxy for over nearly 18 years from its launch in 1978 to 1996. The long-term observations have been useful in understanding the complex relation between UV continuum and emission line variability Seyfert galaxies. In this p…