Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Geeta Rangwal"'
Autor:
Xinlei Chen, Brajesh Kumar, Xinzhong Er, Helong Guo, Yuan-Pei Yang, Weikang Lin, Yuan Fang, Guowang Du, Chenxu Liu, Jiewei Zhao, Tianyu Zhang, Yuxi Bao, Xingzhu Zou, Yu Pan, Yu Wang, Xufeng Zhu, Kaushik Chatterjee, Xiangkun Liu, Dezi Liu, Edoardo P. Lagioia, Geeta Rangwal, Shiyan Zhong, Jinghua Zhang, Jianhui Lian, Yongzhi Cai, Yangwei Zhang, Xiaowei Liu
Publikováno v:
The Astrophysical Journal Letters, Vol 971, Iss 1, p L2 (2024)
We present early-phase good-cadence (hour-to-day) simultaneous multiband ( ugi and vrz bands) imaging of the nearby supernova SN 2024ggi, which exploded in the nearby galaxy NGC 3621. A quick follow-up was conducted within less than a day after the e
Externí odkaz:
https://doaj.org/article/9e758fda25914355a1a05a30446d5b0f
Autor:
Kuldeep Belwal, D. Bisht, Mohit Singh Bisht, Geeta Rangwal, Ashish Raj, Arvind K. Dattatrey, R. K. S. Yadav, B. C. Bhatt
Publikováno v:
The Astronomical Journal, Vol 167, Iss 5, p 188 (2024)
We conducted a photometric and kinematic analysis of the young open cluster NGC 2345 using CCD UBV data from 2 m Himalayan Chandra Telescope, Gaia Data Release 3, Two Micron All-Sky Survey, and the Photometric All-Sky Survey data sets. We found 1732
Externí odkaz:
https://doaj.org/article/4b7cf1c994c5400fba5be3c48184d500
Autor:
R. K. S. Yadav, Arvind K. Dattatrey, Geeta Rangwal, Annapurni Subramaniam, D. Bisht, Ram Sagar
Publikováno v:
The Astrophysical Journal, Vol 961, Iss 2, p 251 (2024)
We present the study of four far-ultraviolet (FUV) bright stars in the field of the open cluster NGC 2420 using the Ultra Violet Imaging Telescope mounted on AstroSat. The three stars 525, 527, and 560 are members, while star 646 is a nonmember of th
Externí odkaz:
https://doaj.org/article/bd735cc6863d4a57901fcde58aa31c09
We present the intra-cluster kinematics and dynamics of three open clusters: NGC 1193, NGC 2355, and King 12 by incorporating kinematical and photometric data from Gaia DR3, as well as a ground-based telescope. After selecting cluster members based o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1f2bcfdf0792efdf11da0593d43b68bb
Autor:
D. Bisht, Qingfeng Zhu, R. K. S. Yadav, Geeta Rangwal, Devesh P. Sariya, Alok Durgapal, Ing-Guey Jiang
This paper presents a deep investigation of two open clusters, Haffner 22 and Melotte 71, using astrometric and photometric data from Gaia EDR3. We identified 382 and 597 most probable cluster members with membership probability higher than 50 percen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a54dc1ef14190e61c2c718cb16c842d1
Autor:
D. Bisht, Qingfeng Zhu, W. H. Elsanhoury, R. K. S. Yadav, Geeta Rangwal, Devesh P. Sariya, Alok Durgapal, Ing-Guey Jiang
Publikováno v:
The Astronomical Journal. 164:171
Open clusters are groups of stars that form simultaneously; hence, these are excellent probes to test theories of star formation, stellar evolution, and dynamics in the Milky Way disk. We carry out a detailed photometric and kinematic study of five p
Autor:
Geeta Rangwal, Devesh P. Sariya, N. V. Chupina, D. Bisht, R. K. S. Yadav, Ing-Guey Jiang, M. D. Sizova, S. V. Vereshchagin
This paper presents an investigation of an old age open cluster King 11 using Gaia's Early Data Release 3 (EDR3) data. Considering the stars with membership probability ($P_{\mu}$) $> 90\%$, we identified 676 most probable cluster members within the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eef2b5d406182f77a6ca5ecb291846bc
http://arxiv.org/abs/2106.04783
http://arxiv.org/abs/2106.04783
Autor:
Geeta Rangwal, Devesh P. Sariya, Qingfeng Zhu, D. Bisht, Alok Durgapal, W. H. Elsanhoury, R. K. S. Yadav, Ing-Guey Jiang
The membership determination for open clusters in noisy environments of the Milky Way is still an open problem. In this paper, our main aim is provide the membership probability of stars using proper motions and parallax values of stars using Gaia ED
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e2b8edcb05a583e47de898f1728f5829
http://arxiv.org/abs/2104.01059
http://arxiv.org/abs/2104.01059
Autor:
Devesh P. Sariya, Geeta Rangwal, Rakesh Yadav, D. Bisht, Alok Durgapal, Qingfeng Zhu, Ing-Guey Jiang
We present CCD $UBVI$ photometric study of poorly studied intermediate age open cluster SAI 35 (Juchert 20) for the first time. To accomplish this study, we also used LAMOST DR5, 2MASS, and Gaia EDR3 databases. We identified 214 most probable cluster
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6db7c64556ba0171269f5fd90f57ed90
http://arxiv.org/abs/2102.03735
http://arxiv.org/abs/2102.03735