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Khag L October 2015
No. 104 KHAG L OCTOBER 2015 Editor : Editorial Assistant : Somak Raychaudhury Manjiri Mahabal ([email protected]) ([email protected]) A quarterly bulletin of the Inter-University Centre for Astronomy and Astrophysics ISSN 0972-7647 (An autonomous institution of the University Grants Commission) Available online at http://ojs.iucaa.ernet.in/ AT THE HELM... Professor Somak Raychaudhury has taken over as the Director, IUCAA, with effect from September 1, 2015 on my superannuation. He had his undergraduate education at Presidency College, Kolkata and the University of Oxford. For his Ph.D. he worked with Professor Donald Lynden- Bell at the Institute of Astronomy, University of Cambridge, UK, followed by post- doctoral fellowships at the Harvard- Smithsonian Center for Astrophysics, Cambridge, Harvard University, USA, and at the Institute of Astronomy. He was a faculty member at IUCAA during 1995 - 2000, and then at the University of Birmingham. In 2012, he joined the Presidency University, Kolkata, where he Somak Raychaudhury (Left) and Ajit Kembhavi was the Head of the Department of Physics and Dean, Natural Sciences. and will be greatly concerned Contents... with the University Programmes Reports of Past Events 1,2,3,4,5,6 Professor Raychaudhury’s research interests of IUCAA. Announcements 7 are in the areas of Galaxy Groups, Galaxy Welcome and Farewell 8 The IUCAA family looks forward Clusters and Large Scale Structures, and New Associates 9 carries out Observational work in the to his leadership in taking IUCAA Seminars 10 Optical, Radio and X-ray domains. Professor further along the path of progress. Visitors 10,11 Raychaudhury is deeply involved in Congratulations 11 Know Thy Birds 12 teaching of Astronomy and Public Outreach, Ajit Kembhavi KHAG L | IJmoc | No. -
Khagol Bulletin Apr 2017
No. 110 KHAG L APRIL 2017 Editor : Editorial Assistant : Aseem Paranjape Manjiri Mahabal ([email protected]) ([email protected]) A quarterly bulletin of the Inter-University Centre for Astronomy and Astrophysics Available online at http://ojs.iucaa.in/ ISSN 0972-7647 (An autonomous institution of the University Grants Commission) Follow us on our face book page : inter-university-centre for Astronomy and Astrophysics Contents... Reports of Past Events 1 to 10 Congratulations 2 Public Outreach Activities 8, 9 Workshop on Aspects of Gravity Farewell 10 Visitors 10, 11 and Cosmology Know Thy Birds 12 An international workshop on Aspects of Gravity and Cosmology was organised at IUCAA, involving some of the large surveys during March 7 - 9, 2017, covering a broad range of topics in classical and quantum aspects of currently in operation, such as the Dark gravitation and cosmology. The lively and eclectic academic programmes covered topics as Energy Survey and the search for diverse as emergent gravity, cosmo-biology, including a historical survey of observational cosmological neutral hydrogen. cosmology, as the subject progressed from the early days of IUCAA up to the latest results, Along with the academic programmes, one session concentrated on issues in Public Outreach in Science, including talks on contd. on page 2... On February 28, 2017, it was revealed that IUCAA Science Day celebrations was just as popular, be it a Sunday or a weekday! The celebrations of National Science Day (this time mid- week on a Tuesday) attracted numerous groups of students from in and around Pune, and as far as Parbhani (about 10 hours bus journey to Pune). -
Sanchita Pal
Centre of Excellence in Space Sciences, India Indian Institute of Science Education and Research Kolkata Mohanpur-741246 West Bengal Citizenship: Indian Gender: Female Sanchita Pal Field of research: The solar origin of space weather and its terrestrial impact and an overall assessment of the pathways through which space weather impacts are mediated and thus to predict the space weather disturbances. Name of institute: Center of Excellence in Space Sciences, India, IISER Kolkata. Pursuing degree: Ph.D. Completed degree (in descending order): M.Tech in Radio Physics and Electronics (Specialization: Space science). B.Tech in Electronics and Communication Engineering. Poster presentations : Poster on ‘Investigating the cause of fewer geomagnetic storm during the higher peak of the double-peaked sunspot cycle 24’ in the international conference, ‘Science for Space weather’, held on January,2016,Goa,India. Schools/Workshops Attended (in descending order): CCMC Space weather Concepts and Tools. (2016). IRIS-5 workshop held on Inter- University Institute of Astronomy and Astrophysics (IUCAA), Pune. IMPRESS-2015 (Inspiring the Minds of Post-graduates for Research in Earth and Space Sciences - 2015) organized by Indian Institute of Page 1 of 4 Geomagnetism (IIG), Navi Mumbai at Equatorial Geomagnetic Research Laboratory (EGRL), Tirunelveli. Purpose of study in the research field : Space weather impact is one of the serious issues in recent world. Many significant models, systems have been generated to observe and analysis space weather in broad way. Now the most important thing is to predict the space weather some time before so that measurements can be taken for the hazards. My purpose of study is to contribute in predicting the space weather impacts by observing their sources on solar surface with the help of some predefined models. -
We Have Our Own MSSQL Database That Gathers All the Information
International Astronomical Union Union Astronomique Internationale POST MEETING REPORT FORM Deadline for Submission: within 1 month after the meeting For Symposia the following documents should be attached: (i) Final scientific program, list of invited review speakers and session chairs; (ii) Summary of the scientific highlights of the meeting (1 page, to be published on the IAU website); (iii) List of participants, including their distribution by country and gender (double bar chart); (iv) List of recipients of IAU grants, stating the amount received, country and gender; (v) An Executive Summary of the Meeting (1-2 pages) to be published on the IAU website. For Symposia the Post Meeting Report should be sent to the AGS. For Focus Meetings the Post Meeting Report should include the documents referred to above in (i), (ii) and (v) and be sent to the GS. For Regional Meetings the Post Meeting Report should include the documents referred above fromm (i) to (v), as well as a proposal for the next venue, and be sent to the GS. 1. Meeting Number: 2. Meeting Title: 3. Coordinating Division: 4. Dedication of meeting (if any): 5. Location (city, country): 6. Dates of meeting: 7. Number of participants: 8. List of represented countries: 9. Report submitted by: 10. Date and place: 11. Signature of SOC Chairperson: POST MEETING REPORT IAU Symposium 335 Space Weather of the Heliosphere: Processes and Forecasts Symposium photograph taken on 19th July 2017. Table of Contents (i) Final scientific program 2 List of invited review speakers and session chairs 2 Oral Program 3 Poster Program 12 (ii) Summary of the scientific highlights 18 (iii) List of participants 19 (iv) List of recipients of IAU grants 25 (v) Executive Summary 26 1 (i) Final scientific program, list of invited review speakers and session chairs We list invited speakers and session chairs below and the next pages detail the scientific oral and poster programs, with any corrections from the published conference booklet. -
Universe Became a Light-Filled State
Universe Became a Light-Filled State But the big mystery lies in how it actually emerged from the dark into its light- filled state, and that’s what researchers from the University of Iowa set out to solve. [25] A team of astronomers from the Inter University Centre for Astronomy & Astrophysics (IUCAA), and Indian Institute of Science Education and Research (IISER), both in Pune, India, and members of two other Indian universities, have identified a previously unknown, extremely large supercluster of galaxies located in the direction of constellation Pisces. [24] Enigmatic 'dark energy', thought to make up 68% of the universe, may not exist at all, according to a Hungarian-American team. [23] Astronomers in the US are setting up an experiment which, if it fails – as others have – could mark the end of a 30-year-old theory. [22] Russian scientists have discovered that the proportion of unstable particles in the composition of dark matter in the days immediately following the Big Bang was no more than 2 percent to 5 percent. Their study has been published in Physical Review D. [21] Researchers from the University of Amsterdam’s (UvA) GRAPPA Center of Excellence have just published the most precise analysis of the fluctuations in the gamma-ray background to date. [20] The Dark Energy Spectroscopic Instrument, called DESI, has an ambitious goal: to scan more than 35 million galaxies in the night sky to track the expansion of our universe and the growth of its large-scale structure over the last 10 billion years. [19] If the axion exist and it is the main component of Dark Matter, the very relic axions that would be bombarding us continuously could be detected using microwave resonant (to the axion mass) cavities, immersed in powerful magnetic fields. -
Abstract Book
Abstract Book IAU SYMPOSIUM 340 Long Term Datasets for the Understanding of Solar and Stellar Magnetic Cycles 19 – 24 February 2018 B. M. Birla Auditorium, Jaipur, India Table of Contents Title Page Number Monday, 19th February 2018 Session 1: Velocity Fields in the Convective Zone [Chair: Siraj Hasan] 1 Aaron C Birch - Data and Methods for Helioseismology 1 Shravan Hanasoge - New constraints on interior convection from measurements of normal-mode 1 coupling Chia-Hsien Lin - Probing solar-cycle variations of magnetic fields in the convective zone using 2 meridional flows Robert Cameron - Small-scale flows and the solar dynamo 2 Sarbani Basu - Solar Large-scale flows and their variations 2 Sushant S. Mahajan - Torsional oscillations: a tool to map magnetic field amplification inside the 3 Sun Session 2. Most widely used Indices of Solar Cycle - Magnetic Field and Sunspot Number 3 [Chair - Alexi Peptsov] Aimee Norton - A Century of Solar Magnetograms 3 J Todd Hoeksema - Long-term Measurement of the Solar Magnetic Field 3 Nataliia Shchukina - Kyiv monitoring program of spectral line variations with 11-year cycle. Quiet 4 Sun Dilyara Baklanova - Long-term stellar magnetic field study at the Crimean Astrophysical 4 Observatory Cesare Scalia - The long term variation of the effective magnetic field of the active star epsilon 5 Eridani Frédéric Clette - Sunspot number datasets : status, divergences and unification 5 Richard Bogart - MDI + HMI: 22 Years of Full-Disc Imagery from Space 6 Jagdev Singh - Variations in Ca-K line profiles and normalized Intensity as a function of latitude and 6 solar cycle during the 20th century: Implication to Meridional flows Angela R. -
Nandi Dibyendu Indo
Indo-US Bilateral Cooperation Program in Heliophysics and Space Weather Dibyendu Nandy ~~ Indian Institute of Science Education and Research, Kolkata What is Heliophysics? • Solar variability forces space environment and planetary atmospheres • Characterize space weather and climate • System-wide studies defines the science of Heliophysics http://en.wikipedia.org/wiki/Heliophysics http://science.nasa.gov/heliophysics/ Why heliophysics? Sun Creates Space Weather Hinode • Sunspots are strongly magnetized regions • Solar storms originate within sunspots and travel to Earth in few days • Solar flares and coronal mass ejections (CMEs) – biggest explosions in the solar system – eject magnetized plasma and charged particles (m ~ 10 12 Kg, v ~ 500-2000 km/s, E ~ 10 24 Joules, 10 12 atom bombs) Space Weather Effects: Satellite Operations, Telecommunications • Satellite operations (charging: interferes with electronic circuitry) • Space walks (exposes astronauts to high radiation) • Disrupts telecommunication systems (GPS, Satellite TV broadcasts) Space Weather: Radio Communications & Flights HF Communication only • Solar plasma and magnetic fields get through the Earth’s polar (open magnetic field) regions; auroras are caused by geomagnetic stomrs • Affects air-traffic over polar routes Space Weather Effects: Geomagnetic Storms, Electric Facilities • Effect of solar storms felt at ground level at high latitudes • Induces large voltages in northern oil pipelines, fire hazards • Trips electric power grids Space Weather Affects Critical Technologies -
SITARE Workshop Nepal
SITARE Workshop Nepal Southampton -IUCAA Training for Astronomical Research and Education 13-15 June, 2018 Central Department of Physics, Tribhuvan University, Kathmandu, Nepal Program Day 10:00- 11:00- 11:30- 12:30- 14:00- 15:30- 16:00- (June, 2018) 11:00 11:30 12:30 14:00 15:00 16:00 17:00 13 BA T KS LUNCH SM T IJ 14 BA E KS LUNCH SR E IJ 15 SM A KS LUNCH SR A IJ Speakers BA: Binil Aryal, Tribhuvan University : Galaxy Evolution IJ: Ian Jones, Univ. of Southampton : Gravitational Wave Astronomy SM: Sanjit Mitra, IUCAA : Cosmic Microwave Background SR: Somak Raychaudhury, IUCAA : Observational Cosmology KS: Kanak Saha, IUCAA : Dynamics and Structure of galaxies Participants SN Name Affiliation Study/Teaching 1 Ajay Gopali CDP, TU, Kirtipur M.Sc. Student 2 Ajay Kumar Jha CDP, TU, Kirtipur Faculty (Astro) 3 Amrit Khadka CDP, TU, Kirtipur M.Sc. Student 4 Amrit Sedain CDP, TU, Kirtipur M.Sc. Student 5 Arjun Kumar Gautam (LOC) CDP, TU, Kirtipur Ph.D. Student 6 Aswin Thapa CDP, TU, Kirtipur M.Sc. Thesis Student 7 Barun DC CDP, TU, Kirtipur M.Sc. Student 8 Bhanu Prasad Sapkota (LOC) CDP, TU, Kirtipur Ph.D. Student 9 Bijaya Kharel CDP, TU, Kirtipur M.Sc. Student 10 Bijaya Sharma CDP, TU, Kirtipur M.Sc. Student 11 Bimal Bhandari PMC, Lalitpur M.Sc. Student 12 Binod Bhandari CDP, TU, Kirtipur M.Sc. Student 13 Daya Nidhi Chattkuli CDP, TU, Kirtipur Ph.D. Student 14 Debit Subedi CDP, TU, Kirtipur M.Sc. Student 15 Devendra Upadhaya Amrit College Faculty (Astro) 16 Devi Sapkota CDP, TU, Kirtipur M.Sc. -
Arxiv:1811.05647V1
Draft version November 15, 2018 Typeset using LATEX twocolumn style in AASTeX61 AGN FEEDBACK IN GALAXY GROUPS: A DETAILED STUDY OF X-RAY FEATURES AND DIFFUSE RADIO EMISSION IN IC1262 M. B. Pandge,1, ∗ S. S. Sonkamble,2 Viral Parekh,3 Pratik Dabhade,4,5 Avni Parmar,3 M. K. Patil,6 and Somak Raychaudhury7,8,9 1SERB Young Scientist,Dayanand Science College, Barshi Road Latur, 413 512, India. 2National center for Radio Astrophysics (NCRA), Tata Institute of Fundamental Research (TIFR), Pune 411 007, India. 3Raman Research Institute, C. V. Raman Avenue, Sadashivnagar, Bangalore 560080, India. 4Inter-University center for Astronomy and Astrophysics, Post Bag 4,Ganeshkhind, Pune-411 007, India. 5Leiden Observatory, Leiden University, Niels Bohrweg 2, 2333 CA, Leiden, Netherlands. 6School of Physical Sciences, Swami Ramanand Teerth Marathwada University Nanded, 431 606, India. 7Inter-University Centre for Astronomy and Astrophysics, Post Bag 4, Ganeshkhind, Pune-411 007, India. 8Department of Physics, Presidency University, 86/1 College Street, Kolkata 700073, India. 9School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK. (Received July 1, 2016; Revised September 27, 2016; Accepted November 15, 2018) Submitted to ApJ ABSTRACT This paper reports a systematic search of X-ray cavities, density jumps and shocks in the inter-galactic environment of the galaxy group IC 1262 using Chandra, GMRT and VLA archival observations. The X-ray imaging analysis reveals a pair of X-ray cavities on the north and south of the X-ray peak, at projected distances of 6.48kpc and 6.30 kpc respectively. Total mechanical power contained in both these cavities is found to be 12.37 1042 erg s−1, ∼ × and compares well with the X-ray luminosity, within the cooling radius, measured to be 3.29 1042 erg s−1, ∼ × suggesting that the mechanical power injected by the central AGN efficiently balances the radiative loss. -
Abstracts and Speaker Profiles
Project: Laser Interferometer Gravitational-Wave Observatory (LIGO) Prof. Somak Raychaudhury, Director, IUCAA, Pune LIGO-India: Ripples at the cutting edge of Science and Technology Abstract: • Within the last four years, epoch-making discoveries have been made by the Laser Interferometric Gravitational-Wave Observatories (LIGO) in the USA, with the discovery of gravitational waves, which have confirmed Einstein's formulation of the nature of gravitation, and has opened up a completely new way of studying the Universe. In collaboration with the USA, we are about the build the third such observatory in India (LIGO-India), which will become a crucial node of the worldwide network of these detectors. Building LIGO-India represents challenges not just to the scientific community, but poses unique challenges and opportunities for engineers and Indian industry, and promises a cutting-edge international facility on Indian soil for coming generations. I will introduce LIGO-India, and review its current status and the challenges ahead. About the Speaker: • Somak Raychaudhury is the Director of the Inter-University Centre for Astronomy and Astrophysics (IUCAA), Pune, and is the Chair of the TMT-India Project Management Board and the LIGO-India Science Management Board. He graduated from Presidency College, University of Calcutta, and University of Oxford, UK. After his PhD from the University of Cambridge, UK, he worked at the Harvard-Smithsonian Center for Astrophysics, USA, where he was part of the team that built the Chandra X-Ray Observatory for NASA. After faculty positions at IUCAA, Pune and at the University of Birmingham, UK, he was Dean of Sciences at Presidency University, Kolkata, before his current position. -
IUCAA, Passed Away on February 6, 2018 at the Age of 82
No. 114 APRIL 2018 Homage to Professor Donald Lynden-Bell Professor Donald Lynden-Bell, FRS, one of the world's most distinguished scientists and an Honorary Fellow of IUCAA, passed away on February 6, 2018 at the age of 82. He was a frequent visitor at IUCAA and a life-long well-wisher of the institute. In his memory, and as a celebration of his life and his invariably cheerful scientific attitude, a condolence meeting was held at IUCAA on February 8, 2018. Several IUCAA academics recounted their most treasured memories of Professor Lynden- Bell at this gathering. This issue of Khagol shares some of these memories of Professor Lynden-Bell and his long association with IUCAA, with contributions from Professors Naresh Dadhich, Ajit Kembhavi and T. Padmanabhan. [1936 - 2018] Reports of Past Events 1 to 8 Colloquia, Seminars, Congratulations 4 Farewell 6 Public Outreach Activities 9 to 18 Visitors 19, 20 No. 114 - April 2018 01 Ever curious and playful with ideas Naresh Dadhich Donald's piercing eyes, always bearing a poignant sparkle of for two terms, and he had been visiting IUCAA quite regularly. seeing something new and insightful, as well as teasingly It was warmly acknowledged in electing him the Honorary playful, are what the most fascinating and enchanting picture I Fellow. have of him. I had first met him in 1986 in his office when he was about to leave to give lecture in a summer school. We had There are two profound things I learnt from him, one keep on a warm hand shake and announced that he would throw me staring at equation slowly you will understand it, and second out in 10 minutes. -
Exploring the Origin and Dynamics of Solar Magnetic Fields
EXPLORING THE ORIGIN AND DYNAMICS OF SOLAR MAGNETIC FIELDS Soumitra Hazra Department of Physical Sciences and Centre of Excellence in Space Sciences India Indian Institute of Science Education and Research Kolkata arXiv:1604.00563v1 [astro-ph.SR] 2 Apr 2016 This dissertation is submitted for the degree of Doctor of Philosophy in Science 2015 Dedicated to My Parents... Declaration This thesis is a presentation of my original research work. Wherever contributions of others are involved, every effort is made to indicate this clearly, with due reference to the literature and acknowledgments of collaborative research and discussions. The work has not been submitted earlier either in entirety or in parts for a degree or diploma at this or any other Institution or University. Some chapters of this thesis have either been published or are in the process of being published. This work was done under the guidance of Dr. Dibyendu Nandi, at the Indian Institute of Science Education and Research Kolkata (IISER Kolkata). Soumitra Hazra 2015 CERTIFICATE FROM THE SUPERVISOR This is to certify that this thesis entitled "Exploring the Origin and Dynamics of Solar Magnetic Fields" – which is being submitted by Soumitra Hazra (who registered on 11th August, 2009 for a PhD Degree with registration number 09RS028 at the Indian Institute of Science Education and Research Kolkata) – is based upon his own research work under my supervision and that neither this thesis nor any part of it has been submitted for any degree or any other academic award anywhere else. Dr. Dibyendu Nandi Associate Professor Department of Physical Sciences and Center of Excellence in Space Sciences India Indian Institute of Science Education and Research Kolkata West Bengal 741246 India Acknowledgements This is a special moment for me and I wish to express my sincere gratitude to my thesis supervisor Dibyendu Nandi, who introduced me to the exciting world of research in Astro- physics.