Sravani Vaddi

Visiting Fellow
Email: sravani [at]
Phone: +91 - 20 - 25719218
Extn: 9218
Office: F218
National Centre for Radio Astrophysics
Tata Institute of Fundamental Research
Savitribai Phule Pune University Campus,
Pune 411 007
Maharashtra, INDIA

Main Research Areas: Active Galactic Nuclei (AGNs); AGN feedback; Star formation; Galaxy clusters; Cooling flows.


I have obtained my Ph.D. degee from the Rochester Institute of Technology, Rochester, USA in 2016 where I worked with Dr. Chris O'Dea and Dr. Stefi Baum. Prior to this, I obtained a Master's of Technology degree in Digital Electronics and Communication Systems from Jawaharlal Nehru Technological University. I also have five years of work experience as a Software Engineer in Tata Consultancy Services.

Research description:

Ionization of cooling flow filaments in the cool-core galaxy clusters has been an unsolved mystery for more than two decades. I am currently exploring the possible sources that are heating/ionizing the gas in these filaments by analyzing HST-COS far-ultraviolet spectra of cool-core galaxy clusters. Ultraviolet line diagnostics can be used to distinguish between various ionization models. In an earlier project, I studied the effect of AGN activity in a sample of nearby early-type galaxies using analysis of multi-wavelength archival data. I am also involved in a citizen science research collaboratory, RAD@home, which is a human-resource network to educate and directly involve a large population of science-educated graduates and under-graduates in research.

Selected publications:

1. Constraints on feedback in the local universe: The relation between star formation and AGN activity in typical elliptical galaxies (Vaddi et al. 2016, ApJ, 818, 182)

2. New results on the exotic galaxy Speca and discovering many more Specas with RAD@home network (Hota et al. (including Vaddi) 2014, arxiv/1402.3674)

3. On the Ionization of Luminous WMAP Sources in the Galaxy: Constraints from He Recombination Line Observations with the GBT (Roshi, A., Plunkett, A., Rosero, V., & Vaddi, S. 2012, ApJ, 749, 49)