Zobrazeno 1 - 10
of 20
pro vyhledávání: '"Tirthendu Sinha"'
Autor:
Alik Panja, Lokesh K. Dewangan, Tapas Baug, Wen Ping Chen, Yan Sun, Tirthendu Sinha, Soumen Mondal
Publikováno v:
The Astrophysical Journal, Vol 958, Iss 1, p 17 (2023)
We uncover a hub–filament system correlated with massive young stellar associations in G083.097+03.270. Diagnosed with simultaneous ^12 CO, ^13 CO, and C ^18 O line observations, the region is found to host two distinct and elongated filaments havi
Externí odkaz:
https://doaj.org/article/3860a774ace94cdc8c91b32b6a675a04
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:
Arpan Ghosh, Saurabh Sharma, Joe P. Ninan, Devendra K. Ojha, A. S. Gour, Rakesh Pandey, Tirthendu Sinha, Aayushi Verma, Koshvendra Singh, Supriyo Ghosh, Harmeen Kaur
Publikováno v:
Journal of Astrophysics and Astronomy. 44
Autor:
Saurabh Sharma, Lokesh Dewangan, Neelam Panwar, Harmeen Kaur, Devendra K. Ojha, Ramkesh Yadav, Aayushi Verma, Tapas Baug, Tirthendu Sinha, Rakesh Pandey, Arpan Ghosh, Tarak Chand
Publikováno v:
Journal of Astrophysics and Astronomy. 44
We have performed a detailed analysis on the Teutsch 76 (T76) open cluster using the deep near-infrared (NIR) observations taken with the TANSPEC instrument mounted on the 3.6m Devasthal Optical Telescope (DOT) along with the recently available high
Autor:
M B Naik, Anima Pandey, Ananta K. Ghosh, S. Sharma, D. K. Ojha, A. Richichi, Tirthendu Sinha, Rakesh Pandey
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 498:2263-2269
We report on 26 lunar occultation events observed in the context of a program started at Devasthal in 2017. In addition to the customary observations with the 1.3-m telescope, we report here also the first attempts performed with the TIRCAM2 camera a
Autor:
Saurabh Sharma, Devendra K. Ojha, Arpan Ghosh, Joe P. Ninan, Supriyo Ghosh, Swarna K. Ghosh, P. Manoj, Milind B. Naik, Savio L. A. D’Costa, B. Krishna Reddy, Nandish Nanjappa, Rakesh Pandey, Tirthendu Sinha, Neelam Panwar, Susmitha Antony, Harmeen Kaur, Sanjit Sahu, Tarun Bangia, Satheesha S. Poojary, Rajesh B. Jadhav, Shailesh B. Bhagat, Ganesh S. Meshram, Harshit Shah, John T. Rayner, Douglas W. Toomey, and Pradeep R. Sandimani
We present the design and performance of the TANSPEC, a medium-resolution $0.55-2.5~\mu$m cryogenic spectrometer and imager, now in operation at the 3.6-m Devasthal Optical Telescope (DOT), Nainital, India. The TANSPEC provides three modes of operati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a132a302e8587072ef50678ccc0c7b2a
Autor:
Rakesh Pandey, Saurabh Sharma, Lokesh K. Dewangan, Devendra K. Ojha, Neelam Panwar, Swagat Das, D. P. Bisen, Arpan Ghosh, Tirthendu Sinha
We present a multiwavelength study of the H II region Sh 2-301 (S301) using deep optical data, near-infrared data, radio continuum data and other archival data at longer wavelengths. A cluster of young stellar objects (YSOs) is identified in the nort
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::946d793008b5dd1f3515f32a1ac32526
http://arxiv.org/abs/2112.01539
http://arxiv.org/abs/2112.01539
Autor:
Arpan Ghosh, Saurabh Sharma, Joe P. Ninan, Devendra K. Ojha, Bhuwan C. Bhatt, Shubham Kanodia, Suvrath Mahadevan, Gudmundur Stefansson, R. K. Yadav, A. S. Gour, Rakesh Pandey, Tirthendu Sinha, Neelam Panwar, John P. Wisniewski, Caleb I. Cañas, Andrea S. J. Lin, Arpita Roy, Fred Hearty, Lawrence Ramsey, Paul Robertson, Christian Schwab
The Gaia Alert System issued an alert on 2020 August 28, on Gaia 20eae when its light curve showed a $\sim$4.25 magnitude outburst. We present multi-wavelength photometric and spectroscopic follow-up observations of this source since 2020 August and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::49ffc9f24f15d1aa105147df7e774ad1
Autor:
Saurabh Sharma, Arpan Ghosh, Tirthendu Sinha, Anima Pandey, D. K. Ojha, Neelam Panwar, S. B. Pandey, S. K. Ghosh, Rajesh Pandey
We have performed a detailed analysis of the Czernik 3 (Cz3) open cluster by using deep near-infrared photometry taken with TIRCAM2 on 3.6m Devasthal optical telescope along with the recently available high quality proper motion data from the {\it Ga
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f9d6021b65ecf4821bbdf265ba2975ae
http://arxiv.org/abs/2008.04102
http://arxiv.org/abs/2008.04102
Autor:
Rakesh Pandey, Lokesh K. Dewangan, Devendra K. Ojha, Tirthendu Sinha, Anil K. Pandey, D. P. Bisen, Arpan Ghosh, Saurabh Sharma, Neelam Panwar
Using our deep optical and near-infrared photometry along with multiwavelength archival data, we here present a detailed study of the Galactic H II region Sh 2-305, to understand the star/star-cluster formation. On the basis of excess infra-red emiss
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::029de46b68a1dcff1b8c4be731f69a5c
http://arxiv.org/abs/2001.04722
http://arxiv.org/abs/2001.04722