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Bhuwan Joshi
Udaipur Solar Observatory
Physical Research Laboratory (PRL)
Udaipur 313 001, INDIA

Phone: +91-294-2457215
E-mail: bhuwan[at]prl.res.in
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HXR LT and FP flare sources
X-ray and (E)UV observations of a large X-class solar flare. Looptop (LT) and footpoint (FP) sources are observed in hard X-ray energies and corresponding X-ray spectrum (Joshi et al. 2013, ApJ)

Research Interests

My research interest encompasses understanding the transient activity of our star, the Sun, and its influence on interplanetary medium and near-Earth environment. An important aspect of my research is to explore the physics of basic plasma processes which are believed to occur during the onset and evolution of the solar eruptive phenomena. We focus on the following topics:
      • Origin and evolution of solar flares and coronal mass ejections (CMEs).
      • Magnetic reconnection (in 2D and 3D) and energy release processes (thermal and non-thermal).
      • Observation and modeling of solar X-ray emission and related instrumentation.
      • Space weather and near-Earth consequences of solar eruptions.
      • Observation and analysis of solar radio emission at low frequencies.
      • Long- and mid-term behavior of solar activity cycles.


Participation in ISRO's Space Programs for Solar Studies
      • Science Team Lead and Co-Investigator on High Energy L1 Orbiting X-ray Spectrometer (HEL1OS) on board ADITYA-L1 mission.
      • Member, Science Working Group (SWG) for Aditya-L1 mission constituted by ISRO in October 2018.
      • Member of Science Team for Solar X-ray Monitor (XSM) board Chandrayaan-2 mission.
      • Member of Science Team for Solar Low Energy X-ray Spectrometer (SoLEXS) on board Aditya-L1 mission

Udaipur-CALLISTO Solar Radio Spectrometer

I am Principal Investigator of Udaipur-CALLISTO solar radio spectrometer, indigenously developed and installed at USO-PRL in collaboration with ETH Zurich, Switzerland. The CALLISTO — Compound Astronomical Low cost Low frequency Instrument for Spectroscopy and Transportable Observatory — natively operates between 45 and 870 MHz and is capable of observing the solar eruptive events on real-time basis. The Udaipur-CALLISTO is operational since October 2018. The details of instrument and data (quick look and raw files) are available in Udaipur CALLISTO website.


Research Supervision
PhD students
      • Dr. Upendra Kushawaha, 2010 - 2015, Currently Assistant Professor at University of Allahabad, India.
      • Mr. Prabir K. Mitra, 2016 - 2021, Currently Postdoctoral Fellow at Univ. of Graz, Austria.
      • Mr. Suraj Sahu, SRF, 2017 - present
      • Ms. Binal D. Patel, SRF, 2018 - present
Postdoctoral students
      • Dr. Upendra Kushwaha, 2016
      • Dr. Syed Ibrahim, 2018 - 2019
      • Dr. Navin Chandra Joshi, 2018 - 2020
      • Dr. Hema Kharayat, 2019 - 2021

Membership of Professional Bodies
      • Member of International Astronomical Union (IAU).
      • Member of Astronomial Society of India (ASI) - (L-2065).
      • Memner of Plasma Science Soceity of India (PSSI) - (LM-1305).
      • Member of Indian Society of Remote Sensing (ISRS) - (L-4770).

Curriculum Vitae
List of Publications

Last updated: October 2021
Webpage maintained by Bhuwan Joshi