Zobrazeno 1 - 10
of 20
pro vyhledávání: '"D. K. Sahu"'
Autor:
Zheyu Lin, Ning Jiang, Tinggui Wang, Xu Kong, Dongyue Li, Han He, Yibo Wang, Jiazheng Zhu, Wentao Li, Ji-an Jiang, Avinash Singh, Rishabh Singh Teja, D. K. Sahu, Chichuan Jin, Keiichi Maeda, Shifeng Huang
Publikováno v:
The Astrophysical Journal Letters, Vol 971, Iss 1, p L26 (2024)
The unluckiest star orbits a supermassive black hole elliptically. Every time it reaches the pericenter, it shallowly enters the tidal radius and gets partially tidally disrupted, producing a series of flares. Confirmation of a repeated partial tidal
Externí odkaz:
https://doaj.org/article/097b39f88a544f0cb33f8debbe4e8c0a
Autor:
Rishabh Singh Teja, Avinash Singh, Judhajeet Basu, G. C. Anupama, D. K. Sahu, Anirban Dutta, Vishwajeet Swain, Tatsuya Nakaoka, Utkarsh Pathak, Varun Bhalerao, Sudhanshu Barway, Harsh Kumar, Nayana A. J., Ryo Imazawa, Brajesh Kumar, Koji S. Kawabata
Publikováno v:
The Astrophysical Journal Letters, Vol 954, Iss 1, p L12 (2023)
We present early-phase panchromatic photometric and spectroscopic coverage spanning the far-ultraviolet to near-infrared regime of the nearest hydrogen-rich core-collapse supernova (SN) in the last 25 yr, SN 2023ixf. We observe early “flash” feat
Externí odkaz:
https://doaj.org/article/9680e295a655467685de78734b527dca
Autor:
Anjasha Gangopadhyay, Keiichi Maeda, Avinash Singh, Nayana A. J., Tatsuya Nakaoka, Koji S. Kawabata, Kenta Taguchi, Mridweeka Singh, Poonam Chandra, Stuart D. Ryder, Raya Dastidar, Masayuki Yamanaka, Miho Kawabata, Rami Z. E. Alsaberi, Naveen Dukiya, Rishabh Singh Teja, Bhavya Ailawadhi, Anirban Dutta, D. K. Sahu, Takashi J. Moriya, Kuntal Misra, Masaomi Tanaka, Roger Chevalier, Nozomu Tominaga, Kohki Uno, Ryo Imazawa, Taisei Hamada, Tomoya Hori, Keisuke Isogai
Publikováno v:
The Astrophysical Journal, Vol 957, Iss 2, p 100 (2023)
We present optical, near-infrared, and radio observations of supernova (SN) SN IIb 2022crv. We show that it retained a very thin H envelope and transitioned from an SN IIb to an SN Ib; prominent H α seen in the pre-maximum phase diminishes toward th
Externí odkaz:
https://doaj.org/article/f555b78f96b043cc891a0288f4445391
Autor:
Rishabh Singh Teja, Avinash Singh, D. K. Sahu, G. C. Anupama, Brajesh Kumar, Tatsuya Nakaoka, Koji S Kawabata, Masayuki Yamanaka, Ali Takey, Miho Kawabata
Publikováno v:
The Astrophysical Journal, Vol 954, Iss 2, p 155 (2023)
We present an extensive, panchromatic photometric (UV, optical, and near-IR) and low-resolution optical spectroscopic coverage of a Type IIP supernova SN 2018gj that occurred on the outskirts of the host galaxy NGC 6217. From the V- band light curve,
Externí odkaz:
https://doaj.org/article/c29bf8a08ec94ab388cfcc7fcdd743f6
Autor:
Arpan Ghosh, Saurabh Sharma, Joe P. Ninan, Devendra K. Ojha, Bhuwan C. Bhatt, D. K. Sahu, Tapas Baug, R. K. Yadav, Puji Irawati, A. S. Gour, Neelam Panwar, Rakesh Pandey, Tirthendu Sinha, Aayushi Verma
Publikováno v:
The Astrophysical Journal, Vol 954, Iss 1, p 82 (2023)
We present here the results of 8 yr of our near-simultaneous optical–near-infrared spectro-photometric monitoring of the bona fide FU Ori (FUor)-type candidate V2493 Cygnus (V2493 Cyg) starting from 2013 September to 2021 June. During our optical m
Externí odkaz:
https://doaj.org/article/720edf0f1622498fb221531f4a26d63d
Autor:
D K Sahu, Anjana Sahu
Publikováno v:
Indian Journal of Anaesthesia, Vol 54, Iss 3, Pp 215-218 (2010)
A lateral approach described by Volker Hempel and Dr. Dilip Kotharihas been further studied, evaluated and described in detail in the present study. The aim of this study was to evaluate lateral approach of supraclavicular brachial plexus block, main
Externí odkaz:
https://doaj.org/article/df5a9796a5fc46f490ecbf0bcb8c9da9
Publikováno v:
Materials Today: Proceedings. 5:22181-22187
In the present research module the samples with chemical composition CaMeFe11O19 (where Me = Al and Cr) were successfully synthesized using perfect stoichiometeric proportions of reacting oxides by sol gel auto-combustion method. X - ray diffraction
Publikováno v:
New Astronomy. 30:51-63
We present results of optical broad-band and narrow-band Halpha observations of a sample of forty nearby early-type galaxies. The majority of sample galaxies are known to have dust in various forms viz. dust lanes, nuclear dust and patchy/filamentary
Autor:
Kenneth P. Klaasen, Bin Yang, Jacqueline V. Keane, L. Barrera, Tod R. Lauer, Fabienne A. Bastien, Brian Carcich, J. M. Bai, Bryant Webster-Schultz, Steven R. Chesley, Tomohiko Sekiguchi, Michael J. S. Belton, Joseph Veverka, Marc W. Buie, Pedro J. Gutiérrez, Sarah Sonnett, G. Sarid, Nicholas B. Suntzeff, Myung-Jin Kim, H. M. Kaluna, N. S. Raja, S. R. Duddy, Jean-Baptiste Vincent, Olivier Hainaut, Jian-Yang Li, Peter C. Thomas, Kevin Krisciunas, Carey M. Lisse, Kimberly A. Herrmann, Stephen C. Lowry, Noah Brosch, Gian Paolo Tozzi, R. Vasundhara, Nicholas Moskovitz, Nalin H. Samarasinha, J. Bedient, Bhuwan C. Bhatt, T. Zenn, Alan W. Harris, Henry H. Hsieh, Lawrence H. Wasserman, C. J. Crockett, Stefano Bagnulo, Timm Riesen, P. Chiang, Michal Drahus, Hermann Boehnhardt, Pablo Candia, David Polishook, Wen Ping Chen, Yan Fernandez, Jana Pittichova, Lucy A. McFadden, M. A. Kadooka, Karen J. Meech, William M. Owen, Javier Licandro, Nicholas Mastrodemos, Brian W. Taylor, Donald Hampton, Haibin Zhao, Michael F. A'Hearn, Luisa Lara, S. D. Gillam, D. K. Sahu, Jan T. Kleyna, Beatrice E. A. Mueller, Anita L. Cochran, James M. Bauer, Young-Jun Choi, Tony L. Farnham
Publikováno v:
Icarus. 213:345-368
The evolution of the spin rate of Comet 9P/Tempel 1 through two perihelion passages (in 2000 and 2005) is determined from 1922 Earth-based observations taken over a period of 13 year as part of a World-Wide observing campaign and from 2888 observatio
Autor:
Wen Ping Chen, M. A. Kadooka, B. Webster-Schultz, Henry H. Hsieh, Haibin Zhao, Kimberly A. Herrmann, Bin Yang, D. K. Sahu, David Polishook, L. Barrera, M. J. S. Belton, Sarah Sonnett, G. Sarid, Brian W. Taylor, Javier Licandro, P. Candia, A. Zenn, Tomohiko Sekiguchi, Marc W. Buie, G. P. Tozzi, Yunhee Choi, J. Bedient, Olivier Hainaut, P. Chiang, Donald Hampton, Yanga R. Fernandez, Nicholas B. Suntzeff, Tony L. Farnham, Tod R. Lauer, Michael F. A'Hearn, Stefano Bagnulo, Timm Riesen, Myung-Jin Kim, H. M. Kaluna, L. M. Lara, Jacqueline V. Keane, J. M. Bai, Jan T. Kleyna, Stephen C. Lowry, Beatrice E. A. Mueller, James M. Bauer, P. J. Gutiérrez, Hermann Boehnhardt, Lucy A. McFadden, J. Pittichová, S. R. Chesley, Karen J. Meech, Anita L. Cochran, Nalin H. Samarasinha, N. S. Raja, S. R. Duddy, R. Vasundhara, Bhuwan C. Bhatt, Kevin Krisciunas, Noah Brosch, Nicholas Moskovitz, Lawrence H. Wasserman, J. B. Vincent
Publikováno v:
Icarus. 213:323-344
We present observational data for Comet 9P/Tempel 1 taken from 1997 through 2010 in an international collaboration in support of the Deep Impact and Stardust-NExT missions. The data were obtained to characterize the nucleus prior to the Deep Impact 2