Somak Raychaudhury
Somak Raychaudhury | |
---|---|
Born | Calcutta (now Kolkata), India |
Nationality | Indian |
Fields | Astrophysics, Cosmology |
Institutions | Presidency University, Kolkata, University of Birmingham |
Alma mater |
University of Cambridge Churchill College, Cambridge University of Oxford Trinity College, Oxford Presidency College, Calcutta University of Calcutta |
Doctoral advisor | Donald Lynden-Bell |
Somak Raychaudhury (Bengali: সোমক রায়চৌধুরী) is an Indian astrophysicist. He is Professor and Head of Physics at Presidency University, Kolkata, India,[1] and is affiliated to the University of Birmingham, United Kingdom.[2] He is best known for the discovery and detailed analysis of the Shapley supercluster,[3] the largest and most massive structure of galaxies in the local Universe, and for his work on X-ray, radio and optical studies of galaxy formation and evolution, and observational studies of stellar mass black holes[4][5][6] and supermassive black holes.[7] His significant contributions include those in the fields of gravitational lensing,[8] galaxy dynamics[9] and large-scale motions in the Universe, including the Great Attractor.[10]
Education
Somak Raychaudhury was born in Kolkata (then Calcutta), India. He attended St Xavier's Collegiate School, Kolkata, from which he ranked second in the Madhyamik examination of the West Bengal Board of Secondary Education, 1978. He then studied at St Xavier's College, Kolkata, from which he placed second in the state in the Higher Secondary Examination of the West Bengal Council of Higher Secondary Education. He attended Presidency College, Calcutta, where he completed his B.Sc degree in Physics in 1983. He then went to complete a BA degree in Physics at Trinity College, Oxford, University of Oxford, supported by an Inlaks Scholarship from the Inlaks Shivdasani Foundation,[11] where he won a Douglas Sladen Essay prize. He then proceeded to obtain a Ph.D. in Astrophysics from the University of Cambridge, United Kingdom, as a member of Churchill College, Cambridge, in 1990, supported by an Isaac Newton Studentship. Here, he was a recipient of a Smith's Prize (J.T. Knight Prize) in 1988. The subject of his doctoral thesis, supervised by Donald Lynden-Bell, FRS, was "Gravity, Galaxies and the "Great Attractor" Survey".[12]
Career
Somak Raychaudhury is Professor and Head of Physics at Presidency University, Kolkata,[13] where he is also the Interim Dean of the Faculty of Natural and Mathematical Sciences. He remains affiliated to the Astrophysics and Space Research group, School of Physics and Astronomy, University of Birmingham, where he used to be the director of the Wast Hills Observatory[14] for the period 2003-2012. Prior to this, he was a member of the faculty at the Inter-University Centre for Astronomy and Astrophysics, Pune, India. He was a staff member at the Harvard–Smithsonian Center for Astrophysics, in Cambridge, Massachusetts, working for the Chandra X-ray Observatory. Before this, He was a Smithsonian postdoctoral fellow at the Harvard–Smithsonian Center for Astrophysics, and a tutor at Lowell House, Harvard University. Following his PhD, he was a SERC Research Fellow at the Institute of Astronomy, at the University of Cambridge, Cambridge, and a resident Junior Research fellow at St. Edmund's College, University of Cambridge.
Raychaudhury's research interests lie in the study of the evolution of galaxies in groups and clusters, and on the supercluster filaments of the cosmic web. He has used optical, X-ray, radio, infrared and ultraviolet observations to understand how the transformations of galaxies are related to their local and global environment. He is involved in developing machine learning algorithms for Astronomical data mining. He has published over 80 research papers [15] in peer-reviewed scientific journals on these themes. In addition, he leads a substantial outreach programme involving school students, teachers[16] and the general public.[17] He was one of the key people to start the Indian Astronomy Olympiad, and selected and coached the Indian Olympiad team to top results at the International Astronomy Olympiad in 1999[18] and 2000 .[19] His outreach activities include numerous programmes on radio,[20] television and collaboration with performing artists.[21]
He is a member of the International Astronomical Union,[22] a Fellow of the Royal Astronomical Society, and a Fellow of the European Astronomical Society. He is a Life Member of the Astronomical Society of India,[23] and was an elected member of its Executive Council during 1998-2000.
Selected publications
- Raychaudhury, Somak (1989). "The distribution of galaxies in the direction of the 'Great Attractor'". Nature 342 (6247): 251–255. Bibcode:1989Natur.342..251R. doi:10.1038/342251a0.
- Raychaudhury, Somak; Lynden-Bell, D. (1989). "Tides, torques and the timing argument". Monthly Notices of the Royal Astronomical Society 240: 196–218. Bibcode:1989MNRAS.240..195R.
- Raychaudhury, Somak, A. C. Fabian, A. C. Edge, C. Jones, & W. Forman (1991). "X-ray and optical observations of the Shapley supercluster in Hydra-Centaurus". Monthly Notices of the Royal Astronomical Society 248: 101–111. Bibcode:1991MNRAS.248..101R.
- Lahav, O. ; Naim, A. ; Buta, R.; ..Raychaudhury, Somak; and 7 others (1995). "Galaxies, Human Eyes, and Artificial Neural Networks". Science 267 (5199): 859. arXiv:astro-ph/9412027. Bibcode:1995Sci...267..859L. doi:10.1126/science.267.5199.859.
- Saini, Tarun Deep ; Raychaudhury, Somak; Sahni, Varun & Starobinsky, Alexei (2000). "Reconstructing the Cosmic Equation of State from Supernova Distances". Phys. Rev. Lett. 85: 1162–1165. arXiv:astro-ph/9910231. Bibcode:2000PhRvL..85.1162S. doi:10.1103/PhysRevLett.85.1162.
- Miles, T. A.; Raychaudhury, Somak; Forbes Duncan, D. A. (2004). "The Group Evolution Multiwavelength Study (GEMS): bimodal luminosity functions in galaxy groups". Monthly Notices of the Royal Astronomical Society 355: 785–793. arXiv:astro-ph/0408554. Bibcode:2004MNRAS.355..785M. doi:10.1111/j.1365-2966.2004.08356.x.
- Raychaudhury, Somak (2005). "And Gamow said, let there be a hot universe". Resonance 10 (12): 220–231. doi:10.1007/BF02835146.
- Porter, Scott C.; Raychaudhury, Somak; Pimbblet, Kevin A. and Drinkwater, Michael J. (2008). "Star formation in galaxies falling into clusters along supercluster-scale filaments". Monthly Notices of the Royal Astronomical Society 388: 1152–1160. arXiv:0804.4177. Bibcode:2008MNRAS.388.1152P. doi:10.1111/j.1365-2966.2008.13388.x.
- Mahajan, Smriti; Haines, Chris; Raychaudhury, Somak (2010). "Star formation, starbursts and quenching across the Coma supercluster". Monthly Notices of the Royal Astronomical Society 404: 1745–1760. arXiv:1002.0004. Bibcode:2010MNRAS.404.1745M. doi:10.1111/j.1365-2966.2010.16432.x.
- O'Sullivan, Ewan J.; Giacintucci, Simona; P. David, Laurence; Gitti, Myriam; Vrtilek, Jan M.; Raychaudhury, Somak; Ponman, Trevor J. (2011). "Heating the Hot Atmospheres of Galaxy Groups and Clusters with Cavities: The Relationship between Jet Power and Low-frequency Radio Emission". Astrophysical Journal 735 (1): 11. arXiv:1104.2411. Bibcode:2011ApJ...735...11O. doi:10.1088/0004-637X/735/1/11.
- Burke, Mark J.; Raychaudhury, Somak & 19 others, (2012). "A Transient Sub-Eddington Black Hole X-Ray Binary Candidate in the dust Lanes of Centaurus A". Astrophysical Journal 749 (2): 112. arXiv:1202.3149. Bibcode:2012ApJ...749..112B. doi:10.1088/0004-637X/749/2/112.
References
- ↑ "Presidency University Department of Physics". Retrieved August 19, 2013.
- ↑ "Academic staff in the School of Physics and Astronomy". Retrieved May 12, 2012.
- ↑ "Encyclopedia of Astronomy and Astrophysics, ed. P. Murdin, Taylor and Francis, article 2137". Retrieved May 12, 2012.
- ↑ "Birmingham scientists in black hole discovery, news item on Somak Raychaudhury's research on black holes, Birmingham Mail, 9 April 2012". Retrieved May 21, 2012.
- ↑ "'Ordinary' Black Hole Discovered 12 Million Light Years Away, sciencedaily.com". Retrieved May 21, 2012.
- ↑ "Royal Astronomical Society Press release on Somak Raychaudhury's research". Retrieved May 21, 2012.
- ↑ "A Quest for Cosmic Karma, Science, 31 July 2009: 532-533; an interview with Somak Raychaudhury and others on the effect of supermassive black holes in galaxy groups and clusters.". Retrieved May 12, 2012.
- ↑ "The quest for the golden lens: a perfect alignment of massive objects would offer clues to the rate of cosmic expansion, article by Charles Liu in Natural History Magazine on Somak Raychaudhury's work on gravitational lensing, September 2003". Retrieved May 21, 2012.
- ↑ "Spiral metamorphosis, animation inspired by the work of Somak Raychaudhury and Donald Lynden-Bell". Retrieved May 21, 2012.
- ↑ "Astronomers home in on the Great Attractor, article in New Scientist, on Somak Raychaudhury's work on looking for the Great Attractor, 9 December 1989". Retrieved May 21, 2012.
- ↑ "Inlaks foundation Alumni". Retrieved May 12, 2012.
- ↑ Raychaudhury, S. (1989). "Gravity, Galaxies and the "Great Attractor" Survey". Cambridge University. Retrieved May 12, 2012.
- ↑ "A Call from Home, an article by Kaustuv Basu in "Inside Higher Ed", October 5, 2012". Retrieved October 5, 2012.
- ↑ "The University of Birmingham Observatory". Retrieved June 7, 2013.
- ↑ "Query Results from the ADS Database". Retrieved May 12, 2012.
- ↑ "Report on Somak Raychaudhury's talk on Priorities and Problems in Science Communication: An Indian Perspective at the DFID/UNESCO International Workshop on Science Communication - 3-5 July 2000, London". Retrieved May 21, 2012.
- ↑ "e.g. Can Black Holes be seen? Review of a Café Scientifique discussion led by Somak Raychaudhury, Birmingham Post, 13 December 2011". Retrieved May 21, 2012.
- ↑ "Indian students win honours at astronomy olympiad". Retrieved May 13, 2012.
- ↑ "International Astronomy Olympiad". Retrieved May 13, 2012.
- ↑ "e.g. BBC Radio 4 programme, Stars in their Eyes, 2003-04". Retrieved May 21, 2012.
- ↑ "e.g. Stellar Performance as Student Whips up a Musical Solar Storm, music composed by Tamasine Leighton-Crawford, inspired by Somak Raychaudhury's talk, 2008". Retrieved May 21, 2012.
- ↑ "International Astronomical Union". Retrieved May 12, 2012.
- ↑ "Directory of Members: Astronomical Society of India". Retrieved May 12, 2012.
External links
- Somak Raychaudhury's webpage at Presidency University, Kolkata
- Somak Raychaudhury's homepage at the University of Birmingham
- Somak Raychaudhury's Publications listed on the NASA Astrophysics Data System
- Somak Raychaudhury at Google Scholar citations
- Somak Raychaudhury: Author Search on DBLP, the Computer Science bibliography website
- Website of University of Birmingham, Wast Hills Observatory