Zobrazeno 1 - 10
of 42
pro vyhledávání: '"Sinha, Tirthendu"'
Autor:
Panja, Alik, Dewangan, Lokesh K., Baug, Tapas, Chen, Wen Ping, Sun, Yan, Sinha, Tirthendu, Mondal, Soumen
We uncover a hub-filament system associated with massive star formation in the 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:
http://arxiv.org/abs/2309.13912
Autor:
Pandey, Rakesh, Sharma, Saurabh, Dewangan, Lokesh, Ojha, D. K., Ghosh, Neelam Panwar Arpan, Sinha, Tirthendu, Verma, Aayushi, Kaur, Harmeen
We have studied a star-forming complex S193 using near-infrared (NIR) observations and other archival data covering optical to radio wavelengths. We identified stellar clusters in the complex using the NIR photometric data and estimated the membershi
Externí odkaz:
http://arxiv.org/abs/2309.12410
Autor:
Ghosh, Arpan, Sharma, Saurabh, Ninan, Joe P., Ojha, Devendra K., Bhatt, Bhuwan C., Sahu, D. K., Baug, Tapas, Yadav, R. K., Irawati, Puji, Gour, A. S., Panwar, Neelam, Pandey, Rakesh, Sinha, Tirthendu, Verma, Aayushi
We present here the results of eight years of our near-simultaneous optical/near-infrared spectro-photometric monitoring of bonafide FUor candidate `V2493 Cyg' starting from 2013 September to 2021 June. During our optical monitoring period (between O
Externí odkaz:
http://arxiv.org/abs/2306.00759
Autor:
Ghosh, Arpan, Sharma, Saurabh, Ninan, Joe P., Ojha, Devendra K., Gour, A. S., Pandey, Rakesh, Sinha, Tirthendu, Verma, Aayushi, Singh, Koshvendra, Ghosh, Supriyo, Kaur, Harmeen
In recent times, 3.6m Devasthal Optical Telescope (DOT) has installed an optical to near infra-red spectrograph, TANSPEC, which provides spectral coverage from 0.55-2.5 microns. Using TANSPEC, we have obtained a single epoch spectrum of a set 9 FUors
Externí odkaz:
http://arxiv.org/abs/2302.04645
Autor:
Sharma, Saurabh, Dewangan, Lokesh, Panwar, Neelam, Kaur, Harmeen, Ojha, Devendra K., Yadav, Ramkesh, Verma, Aayushi, Baug, Tapas, Sinha, Tirthendu, Pandey, Rakesh, Ghosh, Arpan, Chand, Tarak
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
Externí odkaz:
http://arxiv.org/abs/2302.04516
Autor:
Sharma, Saurabh, Ojha, Devendra K., Ghosh, Arpan, Ninan, Joe P., Ghosh, Supriyo, Ghosh, Swarna K., Manoj, P., Naik, Milind B., D'Costa, Savio L. A., Reddy, B. Krishna, Nanjappa, Nandish, Pandey, Rakesh, Sinha, Tirthendu, Panwar, Neelam, Antony, Susmitha, Kaur, Harmeen, Sahu, Sanjit, Bangia, Tarun, Poojary, Satheesha S., Jadhav, Rajesh B., Bhagat, Shailesh B., Meshram, Ganesh S., Shah, Harshit, Rayner, John T., Toomey, Douglas W., Sandimani, Pradeep R.
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:
http://arxiv.org/abs/2207.07878
Autor:
Ghosh, Arpan, Sharma, Saurabh, Ninan, Joe. P., Ojha, Devendra K., Bhatt, Bhuwan C., Kanodia, Shubham, Mahadevan, Suvrath, Stefansson, Gudmundur, Yadav, R. K., Gour, A. S., Pandey, Rakesh, Sinha, Tirthendu, Panwar, Neelam, Wisniewski, John P., Canas, Caleb I., Lin, Andrea S. J., Roy, Arpita, Hearty, Fred, Ramsey, Lawrence, Robertson, Paul, Schwab, Christian
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:
http://arxiv.org/abs/2112.01717
Autor:
Pandey, Rakesh, Sharma, Saurabh, Dewangan, Lokesh K., Ojha, Devendra K., Panwar, Neelam, Das, Swagat, Bisen, D. P., Ghosh, Arpan, Sinha, Tirthendu
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:
http://arxiv.org/abs/2112.01539
Autor:
Sinha, Tirthendu, Sharma, Saurabh, Panwar, Neelam, Matsunaga, N., Ogura, K., Kobayashi, N., Yadav, R. K., Ghosh, A., Pandey, R., Bisht, P. S.
We present the results from our time-series imaging data taken with the 1.3m Devasthal fast optical telescope and 0.81m Tenagara telescope in $V$, $R_{c}$, $I_{c}$ bands covering an area of $\sim18^\prime.4\times 18^\prime.4$ towards the star-forming
Externí odkaz:
http://arxiv.org/abs/2108.02107
Autor:
Sinha, Tirthendu, Sharma, Saurabh, Pandey, A. K., Yadav, R. K., Ogura, K., Matsunaga, N., Kobayashi, N., Bisht, P. S., Pandey, R., Ghosh, A.
We present multi-epoch deep ($\sim$20 mag) $I_{c}$~band photometric monitoring of the Sh 2-170 star-forming region to understand the variability properties of pre-main-sequence (PMS) stars. We report identification of 47 periodic and 24 non-periodic
Externí odkaz:
http://arxiv.org/abs/2001.08892