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  • Gaia 20eae: A Newly Discovered Episodically Accreting Young Star 
    Ghosh, Arpan; Sharma, Saurabh; Ninan, Joe P; Ojha, Devendra K; Bhatt, B. 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 (American Astronomical Society, 2022-02-10)
    The Gaia Alert System issued an alert on 2020 August 28, on Gaia 20eae when its light curve showed a ∼4.25 magnitude outburst. We present multiwavelength photometric and spectroscopic follow-up observations of this source ...
  • A Gaia based analysis of open cluster Berkeley 27 
    Sariya, Devesh P; Jiang, Ing-Guey; Bisht, D; Yadav, R. K. S; Rangwal, Geeta (Elsevier B.V, 2023-01)
    In this paper, we have used the Gaia’s Data Release-3 (DR3) data to study an intermediate-age open cluster Berkeley 27 (Be 27). A total of 131 most probable cluster members are picked within the cluster’s radius based ...
  • Gaia DR2 and EDR3 data and evolutionary status of post-AGB stars with high radial velocities 
    Aoki, Wako; Matsuno, Tadafumi; Parthasarathy, M (Oxford University Press on behalf of the Astronomical Society of Japan, 2022-12)
    Using the Gaia Data Release 2 (DR2) and Early Data Release 3 (EDR3) data and list of post-AGB candidates, we investigate the parallax, proper motion, and binarity for 20 post-AGB stars and candidates that have high radial ...
  • Gaia DR2 data and the evolutionary status of eight high-velocity hot post-AGB candidates 
    Parthasarathy, M; Matsuno, T; Aoki, W (Oxford University Press on behalf of the Astronomical Society of Japan, 2020-12)
    From Gaia DR2 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 ...
  • Gaia DR3 Data of Very Young Open Cluster NGC 6530: Distance and Evolutionary Stage of Selected Stars 
    Parthasarathy, M (American Astronomical Society, 2024-06)
    Gaia EDR3 and Gaia DR3 data of selected stars in the very young (1.5-million-year-old) open cluster NGC 6530 are presented. All the selected stars have very accurate Gaia DR3 distances. Most of the selected stars are very ...
  • Gaia EDR3 Data of Post-AGB Stars with Overabundance of s-process Elements: Evolutionary Status and Binarity 
    Parthasarathy, M (American Astronomical Society, 2022-02)
    Kamath et al. analyzed Gaia EDR3 data of 18 post-asymptotic giant branch (AGB) supergiants having overabundance of s-process elements, some of which exhibit unusually low luminosities in disagreement with expectations of ...
  • Gaia view of a stellar sub-structure in front of the Small Magellanic Cloud 
    Omkumar, A. O; Subramanian, S; Niederhofer, Florian; Diaz, J; Cioni, Maria-Rosa L; Youssouf, Dalal El; Bekki, K; de Grijs, R; van Loon, J. T (Oxford University Press on behalf of the Royal Astronomical Society, 2021-01)
    Recent observational studies identified a foreground stellar sub-structure traced by red clump (RC) stars (∼12 kpc in front of the main body) in the eastern regions of the Small Magellanic Cloud (SMC) and suggested that ...
  • Gaia24ccy: An outburst followed the footsteps of its predecessor 
    Singh, Koshvendra; Ninan, J. P; Guo, Zhen; Ivanov, Valentin D; Buckley, David A. H; Ojha, D. K; Monson, Andrew; Chand, Tarak; Sharma, S; Yadav, Ram Kesh; Sahu, D. K; Kumar, Pramod; Elbakyan, Vardan; Nayakshin, Sergei; Fermiano, Vitor; Fang, Min; Borissova, Jura; Chen, Wen Ping; Hambsch, Franz-Josef; Kurtev, Radostin; Morris, Calum; Osses, Javier; Rodríguez, Vania; Sharma, Tanvi; Bandari, Srikanth; Thanathibodee, Thanawuth; Wang, Wei-Hao; Zhou, Yuting (American Astronomical Society, 2026-03-20)
    Accretion-driven outbursts in young stellar objects remain poorly understood, largely limited by a statistically small sample of closely followed-up events. This underscores the importance of a thorough exploration of each ...
  • Gain calibration of CCD systems at VBO 
    Prabhu, T. P; Mayya, Y. D; Anupama, G. C (Indian Academy of Sciences, 1992-03)
    The system gain of two CCD systems in regular use at the Vainu Bappu Observatory, Kavalur, is determined at a few gain settings. The procedure used for the determination of system gain and base-level noise is described in ...
  • Galactic Age Estimates from O-rich Stardust in Meteorites 
    Nittler, L. R; Cowsik, R (The American Physical Society, 1997-01)
    The sup16Osup/17 supO and sup16O/sup18O ratios of refractory oxide grains extracted from primitive meteorites suggest that they originated in low-mass red giant stars prior to the formation of the Solar System 4.6×10/sup9 ...
  • Galactic Bulge Hypervelocity (HVS) RR Lyrae Variable Stars and One High Galactic Latitude HVS HB Star 
    Parthasarathy, M (American Astronomical Society, 2024-01)
    Six Galactic Bulge Hypervelocity (HVS) RR Lyrae stars and one high galactic latitude HVS Horizontal Branch (HB) star found from the ongoing search for HVS in the Gaia DR3 and SIMBAD data are presented. Some of these stars ...
  • The Galactic centre region 
    Roy, Subhashis (Astronomical Society of India, 2004-09)
    We have observed the central 450 region of the Galaxy at 620 MHz band of the Giant Metrewave Radio Telescope (GMRT) in radio continuum, and measured the polarisation properties of 64 small diameter background extragalactic ...
  • Galactic chemical evolution and chemical tagging with open clusters 
    Reddy, A. B. S; Giridhar, S; Lambert, D. L (Indian Academy of Sciences, 2020-12)
    The article presents the consolidated results drawn from the chemical composition studies of Reddy et al. (2012, 2013, 2015, 2016) and Reddy & Lambert (2019), who through the high-dispersion echelle spectra (R=60000) of ...
  • Galactic Chemical Evolution of Exoplanet Hosting Stars: Are High-mass Planetary Systems Young? 
    Swastik, C; Banyal, R. K; Narang, Mayank; Manoj, P; Sivarani, T; Rajaguru, S. P; Athira Unni; Banerjee, Bihan (American Astronomical Society, 2022-08-01)
    The imprints of stellar nucleosynthesis and chemical evolution of the galaxy can be seen in different stellar populations, with older generation stars showing higher α-element abundances and the later generations ...
  • Galactic H II region IRAS 17149 - 3916 - a multiwavelength study 
    Potdar, Ajay; Das, Swagat R; Issac, Namitha; Tej, Anandmayee; Vig, Sarita; Chandra, C. H. Ishwara (Oxford University Press on behalf of Royal Astronomical Society, 2022-02)
    This paper presents a multiwavelength investigation of the Galactic H ii region IRAS 17149 − 3916. Using the Giant Meterwave Radio Telescope, India, first low-frequency radio continuum observations at 610 and 1280 MHz for ...
  • The galactic R coronae borealis stars and the final he-shell flash object V4334Sgr (Sakurai’s object): a comparison 
    Hema, B. P; Pandey, G; Lambert, D. L (Proceedings of Science, 2012-08)
    The high resolution optical spectra of H-deficient stars, R Coronae Borealis stars and H-deficient carbon stars are analyzed by synthesizing the C2 Swan bands (0,1), (0,0), and (1,0) using our detailed line-list and ...
  • The Galactic R Coronae Borealis Stars: The C2 Swan Bands, the Carbon Problem, and the 12C/13C Ratio 
    Hema, B. P; Pandey, G; Lambert, D. L (IOP Publishing, 2012-03-10)
    Observed spectra of R Coronae Borealis (RCB) and hydrogen-deficient carbon (HdC) stars are analyzed by synthesizing the C2 Swan bands (1, 0), (0, 0), and (0, 1) using our detailed line list and the Uppsala model atmospheres. ...
  • Galactic Star Forming Regions and Young Stellar Objects 
    Maheswar, G (Indian Institute of Astrophysics, Bangalore, 2005)
  • Galactic supernova remnants: an updated catalogue and some statistics 
    Green, D. A (Astronomical Society of India, 2004-12)
    A catalogue of 231 Galactic supernova remnants (SNRs) is presented, and the selection effects applicable to the identification of remnants at radio wavelengths are discussed. In addition to missing low surface brightness ...
  • The galactic thick disk: an observational perspective 
    Reddy, B. E (Cambridge University Press, 2010-03)
    In this review, we present a brief description of observational efforts to understand the Galactic thick disk and its relation to the other Galactic components. This review primarily focused on elemental abundance patterns ...

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