Zobrazeno 1 - 10
of 61
pro vyhledávání: '"Mudumba Parthasarathy"'
Autor:
Mudumba, Parthasarathy
Publikováno v:
RNAAS 8, 23, 2024
As part of an ongoing search for hypervelocity stars (HVS) I found seventeen two micron all sky survey (2MASS) sources with Gaia G magnitudes less than 16.0 and radial velocities less than -600 km/sec. All these stars are brighter in the K band when
Externí odkaz:
http://arxiv.org/abs/2401.10635
Publikováno v:
Publications of the Astronomical Society of Japan, 74, 1368-1377. Oxford University Press
Using the Gaia DR2 and EDR3 data and list of post-AGB candidates, we investigate the parallax, proper motion and binarity for twenty post-AGB stars and candidates having high radial velocities. From their Gaia distances their luminosities and kinemat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::35ff5640701f8ec7cab01770b2d0c7d1
https://research.rug.nl/en/publications/434f99e0-4207-46db-923d-65d240311cb1
https://research.rug.nl/en/publications/434f99e0-4207-46db-923d-65d240311cb1
Autor:
Ananta C. Pradhan, Abhisek Mohapatra, Mudumba Parthasarathy, Devendra K. Ojha, Ranjan Kumar, Jayant Murthy
Publikováno v:
Proceedings of the International Astronomical Union. 14:464-467
We have performed photometric analysis of four Galactic globular clusters (GGCs): NGC 4147, NGC 4590, NGC 5053 and NGC 7492 using far-UV and near-UV filters of the Ultraviolet Imaging Telescope (UVIT) on-board AstroSat. With the help of color-magnitu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::05ad38bd2530f8cd5ae8a833e89a5f84
https://doi.org/10.1017/s1743921319007373
https://doi.org/10.1017/s1743921319007373
Autor:
Santi Cassisi, Devendra K. Ojha, Ranjan Kumar, Ananta C. Pradhan, Mudumba Parthasarathy, Jayant Murthy, Abhisek Mohapatra
Publikováno v:
Journal of Astrophysics and Astronomy. 42
We present far ultraviolet (FUV) observations of globular cluster NGC 4147 using three FUV filters, BaF2 (F154W), Sapphire (F169M), and Silica (F172M) of Ultra-Violet Imaging Telescope (UVIT) on-board the \mbox{{\em AstroSat}} satellite. We confirmed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2cfe020afcf4d43661868143c2db04ba
https://doi.org/10.1007/s12036-020-09687-y
https://doi.org/10.1007/s12036-020-09687-y
Autor:
Mudumba Parthasarathy, Ranjan Kumar, Ayush Moharana, Devendra K. Ojha, Ananta C. Pradhan, Abhisek Mohapatra, Jayant Murthy
We present detailed photometric observations of the Galactic globular cluster NGC 7492 using the data obtained with two far-ultraviolet (FUV: 1300 - 1800 \AA) and three near-ultraviolet (NUV: 2000 - 3000 \AA) filters of Ultraviolet Imaging Telescope
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fa58e42087644549f701fd635d1303c4
http://arxiv.org/abs/2012.13712
http://arxiv.org/abs/2012.13712
Publikováno v:
Publications of the Astronomical Society of Japan. 72
From Gaia DR 2 data of eight high velocity hot post-AGB candidates LS 3593, LSE 148, LS 5107, HD 172324, HD 214539, LS IV -12 111, LS III +52 24, and LS 3099, we found that six of them have accurate parallaxes which made it possible to derive their d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::914e2d7d4e553963ab014a80930e8818
https://doi.org/10.1093/pasj/psaa097
https://doi.org/10.1093/pasj/psaa097
We present medium resolution (1000) K-band spectra of 12 post-AGB candidates and related stars. For several objects in our sample, these spectra were obtained for the first time. The Br$\gamma$ line in emission is detected in seven objects indicating
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8087dad0a0e7eabbcab7c6d856b91eae
http://arxiv.org/abs/2007.02241
http://arxiv.org/abs/2007.02241
We report the IR properties of planetary nebulae with WR type and $wels$ central stars known to date and compare them with the IR properties of a sample of PNe with H-rich central stars. We use near-, mid- and far-IR photometric data from archives to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d3512a30a0603b01c0ae77a3f41bc37b
From an analysis of absorption lines in the high resolution spectra we have derived the radial velocities, stellar parameters (Teff, gravity, wind-strength parameter logQ and projected rotational velocity) and abundances (C, N, O, and Si ) of IRAS 17
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8a2b25519589442c9c044cdc6a23fe3b
Autor:
G. Sarkar, N. P. Ikonnikova, A. Y. Kniazev, Mudumba Parthasarathy, Miho N. Ishigaki, Swetlana Hubrig, V. P. Arkhipova
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 481:3935-3952
We present a study of the high-resolution optical spectrum for the hot post-asymptotic giant branch (post-AGB) star, Hen 3-1013, identified as the optical counterpart of the infrared sourceIRAS 14331-6435. For the first time the detailed identificati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a88cec754b7dde832c20544f954e2d4d
https://doi.org/10.1093/mnras/sty2483
https://doi.org/10.1093/mnras/sty2483