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Bhuwan Joshi
Associate Professor
Udaipur Solar Observatory
Physical Research Laboratory
Udaipur 313 004, INDIA

Phone: +91-294-2457215
Fax: +91-294-2457202
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 observed in hard X-ray energies and corresponding X-ray spectrum (Joshi et al. 2013, ApJ).

Research interests

              • High energy processes in solar eruptive phenomena
              • Investigations of long and mid term behavior of solar activity cycles
              • Initiation and evolution of coronal mass ejections
newRecent works

  • Can a coronal jet trigger a two-ribbon solar flare? [click here]
  • Observations and modeling of the  largest flare of Solar Cycle 24 [click here]
  • Coronal Sigmoids: the source of major solar eruptions [click here]
  • Coronal jets and subsequent activation and eruption of a solar eruptive prominence [click here]
  • Evolution and north-south asymmetry of solar activity during cycles 21, 22, and 23 [click here]
  • Large-scale contraction of coronal loops and flare energetics [click here]
  • HXR high energy coronal source: "Smoking gun" evidence for coronal magnetic reconnection [click here]
  • Projects
  • e-CALLISTO - a Solar Radio Spectrograph - at Udaipur Solar Observatory
  • High Energy L1 Orbiting X-ray Spectrometer (HEL1OS) for Aditya L-1 mission
  • Selected publications of last five years (2014-2018)
Successive Flux Rope Eruptions from δ-sunspots Region of NOAA 12673 and Associated X-class Eruptive Flares on 2017 September 6
Mitra, Prabir K.; Joshi, Bhuwan; Prasad, Avijeet; Veronig, Astrid M.; Bhattacharyya, R., The Astrophysical Journal, 2018, 869, 1, id 69

Generalisation of the Magnetic Field Configuration of typical and atypical Confined Flares
Joshi, Navin Chandra; Zhu, Xiaoshuai; Schmieder, Brigitte; Aulanier, Guillaume; Janvier, Miho; Joshi, Bhuwan; Magara, Tetsuya; Chandra, Ramesh; Inoue, Satoshi, The Astrophysical Journal, In press, astro-ph arXiv

A Major Geoeffective CME from NOAA 12371: Initiation, CME-CME Interactions, and Interplanetary Consequences
Joshi, Bhuwan; Ibrahim, M. Syed; Shanmugaraju, A.; Chakrabarty, D., Solar Physics, 2018, 293, 7, id 107

Observations of Two Successive EUV Waves and Their Mode Conversion
Chandra, Ramesh; Chen, P. F.; Joshi, Reetika; Joshi, Bhuwan; Schmieder, Brigitte, The Astrophysical Journal, 2018, 863, 1, id. 101

Observational and model analysis of a two-ribbon flare possibly induced by a neighbouring blowout jet.
Bhuwan Joshi, Julia K. Thalmann, Prabir K. Mitra, Ramesh Chandra, and Astrid M. Veronig, The Astrophysical Journal, 2017, 851, 1, id 29

X-ray Spectrometers onboard Aditya L-1 for solar flare studies.
K. Sankarasubramanian, Manju Sudhakar, Anuj Nandi, Ramadevi M. C., Abhijit Avinash Adoni, Ankur Kushwaha, Anil Agarwal, Arjun Dey, Bhuwan Joshi, et al. (+18 co-authors), Current Science, 2017, Vol 113, No. 4, 625-627

Formation and Eruption of a Flux Rope from the Sigmoid Active Region NOAA 11719 and Associated M6.5 Flare: A Multi-wavelength Study
Joshi, Bhuwan; Kushwaha, Upendra; Veronig, Astrid M.; Dhara, Sajal Kumar; Shanmugaraju, A.; Moon, Yong-Jae, The Astrophysical Journal, 834, 1, id. 42

Blowout Jets and Impulsive Eruptive Flare in a Bald-Patch Topology.
R. Chandra, C.H. Mandrini, B. Schmieder, Bhuwan Joshi , G.D. Cristiani, H. Cremades, E. Pariat, F.A. Nuevo, A.K. Srivastava, and W. Uddin, Astronomy & Astrophysics, 2017, 598, A41

Trigger of successive filament eruptions observed by SDO and STEREO
Sajal Kumar Dhara, B. Ravindra, Pankaj Kumar, R. Banyal, Shibu Mathew, Bhuwan Joshi, Solar Physics, 2017, 292, 145 (22pp)

Pre-flare coronal jet and evolutionary phases of a solar eruptive prominence associated with M1.8 flare: SDO and RHESSI observations.
Bhuwan Joshi, Upendra Kushwaha, Astrid Veronig, and Kyung-Suk Cho, The Astrophysical Journal, 2016, 832, 130 (15pp).

On the role of repetitive magnetic reconnections in evolution of magnetic flux-ropes in solar corona.
Sanjay Kumar, R. Bhattacharyya, Bhuwan Joshi, P. K. Smolarkiewicz, The Astrophysical Journal, 2016, 830, 80 (12pp).

Evolutionary aspects and north-south asymmetry of soft X-ray flare index during solar cycles 21, 22, and 23
Bhuwan Joshi, R. Bhattacharyya, K. K. Pandey, U. Kushwaha and Y.-J. Moon, Astronomy and Astrophysics,  2015, 514, A4 (11pp).

Large-scale Contraction and Subsequent Disruption of Coronal Loops During Various Phases of the M6.2 Flare Associated with the Confined Flux Rope Eruption.
Upendra Kushwaha, Bhuwan Joshi, Astrid M. Veronig, and Yong-Jae Moon, The Astrophysical Journal, 2015, 807, 101 (18 pp).

Impulsive Energy Release and Non-thermal Emission in a Confined M4.0 Flare Triggered by Rapidly Evolving Magnetic Structures.
Upendra Kushwaha, Bhuwan Joshi, Kyung-Suk Cho, Astrid Veronig, Sanjiv Kumar Tiwari, and S. K. Mathew, The Astrophysical Journal, 2014, 791, 1 (16pp).
  • Research Group

  • PhD students
Mr. Prabir K. Mitra (SRF)
Mr. Suraj Sahu (JRF)
  • Postdoctoral researchers
Dr. Navin C. Joshi
Mr. M. Syed Ibrahim
  • Former PhD student
Dr. Upendra Kushwaha (2010-2015) - Currently a faculty in B. N. Mandal University, Fobesganj, Bihar
  • Membership
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)

Complete CV
Useful Links

Last updated: December 2018
Webpage maintained by Bhuwan Joshi