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  • RR Lyrae Stars in the Globular Cluster Palomar 2 
    Ferro, A. Arellano; Fierro, Bustos; Muneer, S; Giridhar, S (Universidad Nacional Autonoma De Mexico, 2023-04)
    A CCD VI imaging time-series over 11-year is employed to explore the light curves of stars in the field of Palomar 2. We discovered 20 RRab and 1 RRc variables. A revision of Gaia-DR3 data enabled us to identify 10 more ...
  • RR lyrae stars in the inner large magellanic cloud: halo-like location with a disk-like distribution 
    Subramaniam, A (EDP Sciences, 2006-04)
    Aims. The distribution of RR Lyrae stars (RRLS) in the inner Large Magellanic Cloud (LMC), and the structure of the halo of the LMC delineated by these stars are studied here. Methods.RRLS identified by the OGLE II survey ...
  • RR Lyrae stars in the inner LMC: Where did they form? 
    Subramaniam, A; Subramanian, S (EDP Sciences, 2009-08)
    RR Lyrae stars (RRLS) belong to population II and are generally used as a tracer of the host galaxy halo. The surface as well as vertical distribution of RRLS in the inner Large Magellanic Cloud (LMC) are studied to ...
  • The RRI 10.4m millimeter-wave telescope 
    Sridharan, T. K (Astronomical Society of India, 1993)
    The 10.4m millimeter-wave telescope of the Raman Research Institute (RRI) has been in operation since 1988. It can observe over the 3-mm atmospheric transmission window (80-115 GHz) where rotational transitions of many ...
  • RRI-GBT multi-band receiver: motivation, design, and development 
    Maan, Yogesh; Deshpande, Avinash A; Chandrashekar, Vinutha; Chennamangalam, Jayanth; Raghavendra Rao, K. B; Somashekar, R; Anderson, Gary; Ezhilarasi, M. S; Sujatha, S; Kasturi, S; Sandhya, P; Bauserman, Jonah; Duraichelvan, R; Amiri, Shahram; Aswathappa, H. A; Barve, Indrajit V; Sarabagopalan, G; Ananda, H. M; Beaudet, Carla; Bloss, Marty; Dhamnekar, Deepa B; Egan, Dennis; Ford, John; Krishnamurthy, S; Mehta, Nikhil; Minter, Anthony H; Nagaraja, H. N; Narayanaswamy, M; O'Neil, Karen; Raja, Wasim; Sahasrabudhe, Harshad; Shelton, Amy; Srivani, K. S; Venugopal, H. V; Viswanathan, Salna T (IOP Publishing, 2013-01)
    We report the design and development of a self-contained multi-band receiver ( MBR ) system, intended for use with a single large aperture to facilitate sensitive and high time-resolution observations simultaneously in 10 ...
  • RS Canum Venaticorum Binaries 
    Eggleton, P. P (Astronomical Society of India, 1978-03)
    Some properties of the RS CVn suntype of eclipsing binaries can be explained in terms of observational selection. Provided that the components of a binary are (a) the sameage, and (b) too small relative to their Roche lobes ...
  • The RS Canum Venaticorum binary HD 116204 
    Mohin, S; Raveendran, A. V (Indian Academy of Sciences, 1987-12)
    BV photometry of HD 116204 have been obtained on 57 nights during the 1983-1984, 1984-1985, and 1986-1987 observing seasons with the 34-cm reflector of the Vainu Bappu Observatory in Kavalur. A photometric period of 21.9 ...
  • RS CVn-type variables. I - Photometry of HR 1099 
    Parthasarathy, M; Raveendran, A. V; Mekkaden, M. V (D. Reidel Publishing Co., 1981-01)
    Photometric observation of HR 1099 inV andB obtained on 18 nights between January and March 1977 is presented. The amplitude of the asymmetric light curve is found to be 0m.10±0m.004 both inV andB. On three occasions—namely, ...
  • RS Ophiuchi 
    Anupama, G. C; Kantharia, N. G (Central Bureau for Astronomical Telegrams, 2006-03)
  • RS Ophiuchi: radio lightcurve development following the 2006 outburst 
    Eyres, S. P. S; Rushton, M; O'Brien, T. J; Beswick, R; Muxlow, T. W. B; Davis, R; Anupama, G. C; Kantharia, N. G; Bode, M; Gawroñski, M. P; Feiler, R; Evans, A (Astronomical Society of a Pacific, 2009-01)
    We report GHz observations beginning 4.5 days after the discovery of RS Ophiuchi undergoing its 2006 recurrent nova outburst. Observations over the first 60 days are included, enabling us to follow spectral development ...
  • The Rumford spectroheliograph of the Yerkes observatory 
    Evershed, John (Taylor and Francis, 1904-04)
  • Runaway stars as witnesses to supernova explosions 
    Kochhar, R. K (Nature Publishing Group, 1978-02)
    A hypothesis is proposed according to which single runaway stars are released from close binaries in which the companion star explodes as a carbon detonation supernova and is totally disrupted. From the stars which can ...
  • RXTE Observations of Magnetic Cataclysmic Variables 
    Rana, V. R; Singh, K. P (Astronomical Society of India, 2003)
    Results from hard X-ray observations with RXTE of 5 Polar systems-V2301 Oph, V1432 Aql, EP Dra, GG Leo and V834 Cen, and an Intermediate Polar TV Col are presented. An improved ephemeris for V2301 Oph using mid-eclipse ...
  • S stars and s-process in the Gaia era I. Stellar parameters and chemical abundances in a sub-sample of S stars with new MARCS model atmospheres 
    Shetye, S; Van Eck, S; Jorissen, A; Van Winckel, H; Siess, L; Goriely, S; Escorza, A; Drisya, K; Plez, B (EDP Sciences, 2018-12)
    Context. S stars are transition objects between M-type giants and carbon stars on the asymptotic giant branch (AGB). They are characterized by overabundances of s-process elements. Roughly half of them are enhanced in ...
  • S7 : Probing the physics of seyfert galaxies through their ENLR & HII regions 
    Dopita, M. A; Shastri, P; Scharwachter, J; Kewley, L. J; Davies, R; Sutherland, R; Kharb, P; Jose, Jessy; Bhatt, H. C; Ramya, S; Hamptona, E; Jina, C; Banfielda, J; Zawa, I; Srivastavaa, Shweta; Jamesa, B (Cambridge University Press, 2015-02)
    Here we present the first results from the Siding Spring Southern Seyfert Spectroscopic Snapshot Survey (S7) which aims to investigate the physics of ∼140 radio-detected southern active Galaxies with z<0.02 through Integral ...
  • Salient mechanical and optical design features of 25m-diameter light-collector of MACE imaging Gamma-Ray Telescope 
    Bandyopadhayay, K; Koul, D. K; Mishra, V. K; Koul, R; Suthar, R. L; Koul, M. K; Jayandranath, M; Bhat, C. L (Astronomical Society of India, 2000)
    A low-threshold energy, high-sensitivity gamma-ray telescope, MACE (for Major Atmospheric Cerenkov Experiment) is proposed to be built in India for explorations of gamma-ray sky in 100's keV - 10's GeV photon energy range, ...
  • Salient mechanical design features of the proposed 17 meter diameter MACE imaging gamma-ray telescope 
    Suthar, R. L; Guha, S; Bandopadhyay, K; Mishra, V. K; Koul, R; Bhat, C. L (Astronomical Society of India, 2002)
    A low-threshold energy, high-sensitivity gamma-ray telescope, MACE (for Major Atmospheric Cerenkov Experiment) is proposed to be built in India for explorations of gamma-ray sky in 100's keV - 10's GeV photon energy range, ...
  • SALT revisits DY Cen: a rapidly evolving strontium-rich single helium star 
    Jeffery, C. S; Kameswara Rao, N; Lambert, D. L (Oxford University Press on behalf of the Royal Astronomical Society, 2020-04)
    The hydrogen-deficient star DY Cen has been reported as an R CrB-type variable, an extreme helium star (with some hydrogen), and as a single-lined spectroscopic binary. It has been associated with a dramatic change in ...
  • A SALT spectral study of S0s hosting pseudobulges 
    Vaghmare, K; Barway, Sudhanshu; Vaisanen, Petri; Ramphul, Rajin; Wadadekar, Yogesh; Kembhavi, Ajit K (Oxford University Press on behalf of the Royal Astronomical Society, 2018-11)
    We present a SALT-RSS spectroscopic study of a sample of S0 galaxies established by Vaghmare et al. (2015) as having pseudobulges using a combination of photometric criteria. We extract the spectra of various regions along ...
  • Samanta Chandra Sekhar : The great naked eye astronomer 
    Naik, P. C; Satpathy, L (Astronomical Society of India, 1998-03)
    Samanta Chandra Sekhar (1835-1904), popularly known as Pathani Samabta in Orissa, worked in astronomy following traditional methods, completely unaware of the telescope and other aids developed in the west. He took ...

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