Zobrazeno 1 - 10
of 69
pro vyhledávání: '"Durgapal, Alok"'
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:
http://arxiv.org/abs/2305.10001
Autor:
Kaur, Harmeen, Sharma, Saurabh, Durgapal, Alok, Dewangan, Lokesh K, Verma, Aayushi, Panwar, Neelam, Pandey, Rakesh, Ghosh, Arpan
We present the results from our deep optical photometric observations of Bochum 2 (Boc2) star cluster obtained using the $1.3$m Devasthal Fast Optical Telescope along with archival photometric data from Pan-STARRS2/2MASS/UKIDSS surveys. We also used
Externí odkaz:
http://arxiv.org/abs/2305.01212
Autor:
Bisht, D., Zhu, Quingfeng, Yadav, R. K. S., Rangwal, Geeta, Sariya, Devesh P., Durgapal, Alok, Jiang, Ing-Guey
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:
http://arxiv.org/abs/2203.16459
Autor:
Bisht, D., Zhu, Qingfeng, Elsanhoury, W. H., Sariya, Devesh P., Rangwal, Geeta, Yadav, R. K. S., Durgapal, Alok, Jiang, Ing-Guey
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:
http://arxiv.org/abs/2104.01059
Autor:
Bisht, D., Zhu, Qingfeng, Yadav, R. K. S., Ganesh, Shashikiran, Rangwal, Geeta, Durgapal, Alok, Sariya, Devesh P., Jiang, Ing-Guey
This paper presents a comprehensive analysis of two pairs of binary clusters (NGC 5617 and Trumpler 22) and (NGC 3293 and NGC 3324) located in the fourth quadrant of our Galaxy. For this purpose we use different data taken from VVV survey, WISE, VPHA
Externí odkaz:
http://arxiv.org/abs/2103.04596
Autor:
Bisht, D., Zhu, Qingfeng, Yadav, R. K. S., Rangwal, Geeta, Durgapal, Alok, Sariya, Devesh P., Jiang, Ing-Guey
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:
http://arxiv.org/abs/2102.03735
Autor:
Bisht, D., Elsanhoury, W. H., Zhu, Qingfeng, Sariya, Devesh P., Yadav, R. K. S., Rangwal, Geeta, Durgapal, Alok, Jiang, Ing-Guey
We present a comprehensive analysis (photometric and kinematical) of poorly studied open cluster NGC 4337 using 2MASS, WISE, APASS, and Gaia~DR2 database. By determining the membership probabilities of stars, we identified 624 most probable members w
Externí odkaz:
http://arxiv.org/abs/2006.13618
Autor:
Kaur, Harmeen, Sharma, Saurabh, Dewangan, Lokesh K., Ojha, Devendra K., Durgapal, Alok, Panwar, Neelam
Deep and wide-field optical photometric observations along with multiwavelength archival datasets have been employed to study the physical properties of the cluster NGC 6910. The study also examines the impact of massive stars to their environment. T
Externí odkaz:
http://arxiv.org/abs/2004.10500
Using data from the Wide-field Infrared Survey Explorer we studied the mid infrared 3.4 $\mu$m (W1-band) and 4.6 $\mu$m (W2-band) flux variability of $\gamma$-ray emitting blazars. Our sample consists of 460 flat spectrum radio quasars (FSRQs) and 57
Externí odkaz:
http://arxiv.org/abs/2004.03777
We present a CCD photometric survey for the search of variable stars in four open clusters namely Berkeley 69, King 5, King 7, and Berkeley 20. The time series observations were carried out for 1 and/or 2 nights for each of the clusters in the year 1
Externí odkaz:
http://arxiv.org/abs/2003.02442