Browsing by Title

Sort by: Order: Results:

  • A recording photoelectric photometer 
    Das, A. K; Ananthakrishnan, R; Bhargava, B. N (The India Meteorological Department, 1951-04)
  • Records of the past solar activity in terrestrial and meteorite archives 
    Bhandari, N (Astronomical Society of India, 1998)
    Time series of cosmogenic radioisotopes in tree rings, sedimentary deposits on sea beds and ice cores form the polar ice caps show a large number of periodicities. Many of them can be attributed to changes in galactic ...
  • Recovering simulated planet and disk signals using SCALES aperture masking 
    Lacha, Mackenzie R; Sallum, Steph; Banyal, R. K; Batalha, Natalie; Blake, Geoff; Brandt, Tim; Briesemeister, Zackery; Desai, Aditi; Eisner, Josh; Fong, Wen-fai; Greene, Tom; Honda, Mitsuhiko; Kain, Isabel; Kilpatrick, Charlie; Kleer, Katherine de; Liu, Michael; Macintosh, Bruce; Martinez, Raquel; Mawet, Dimitri; Miles, Brittany; Morley, Caroline; Pater, Imke de; Powell, Diana; Sheehan, Patrick; Skemer, Andrew; Spilker, Justin; Stelter, Deno; Stone, Jordan; Surya, Arun; Sivarani, T; Wagner, Kevin; Zhou, Yifan (SPIE - The International Society for Optical Engineering, 2023-10)
    The Slicer Combined with Array of Lenslets for Exoplanet Spectroscopy (SCALES) instrument is a lenslet-based integral field spectrograph that will operate at 2 to 5 microns, imaging and characterizing colder (and thus ...
  • Recovery from Maunder-like Grand Minima in a Babcock-Leighton Solar Dynamo Model 
    Karak, B. B; Miesch, Mark (IOP Publishing, 2018-06-20)
    he Sun occasionally goes through Maunder-like extended grand minima when its magnetic activity drops considerably from the normal activity level for several decades. Many possible theories have been proposed to explain the ...
  • Recovery of quiescent novae 
    Kamath, U. S (Astronomical Society of the Pacific, 2009)
    An observational program of recovery and study of quiescent novae is being carried out at the 2m Himalayan Chandra Telescope (HCT) of the Indian Institute of Astrophysics (IIA) since 2004. Some results from this survey are ...
  • Recurrence feature of some of the great magnetic storms recorded at Kodaikanal (1949-1951) 
    Sivaramakrishnan, M. V (The India Meteorological Department, 1952-07)
  • Recurrence tendency of geomagnetic activity during the current sunspot minimum 
    Naqvi, Ali. M; Bhargava, B. N (Manager of Publications Civil Lines Delhi, 1954-12)
    Geomagnetic Activity during the three year period June 1950-June 1953, has been analysed and found to consist mainly of two very long sequences of recurrent (27-day period) moderate geomagnetic storms. During the three ...
  • Recurrent mass ejection associated with flare behind the limb on 1978 December 20 
    Jain, Rajmal; Bhatnagar, A; Shelke, R. N (Astronomical Society of India, 1984-06)
    An interesting solar flare occured on 1978 December 20 behind the north-west limb, in the McMath active region no. 15700, as inferred from the observed associated energtic mass ejections, strong x-rays, decimetric and ...
  • The recurrent nova class of objects 
    Anupama, G. C (Astronomical Society of the Pacific, 2008)
    Recurrent novae (RNe) form a small, but heterogeneous class of cataclysmic variables that have more than one recorded outburst. There are ten known members of this class, with six short period binaries similar to classical ...
  • The recurrent novae and their relation with classical novae 
    Anupama, G. C (American Institute of Physics, 2002)
    Recurrent novae (RNe) are a subclass of cataclysmic variables classified based on recorded observations of more than one nova outburst. They form a small, but heterogeneous group of objects, with 10 known members, that ...
  • Recurrent novae at quiescence: systems with giant secondaries 
    Anupama, G. C; Mikołajewska, J (European Southern Observatory, 1999-04)
    Spectroscopic and photometric behaviour of the class of recurrent novae with giant secondaries (T Coronae Borealis, RS Ophiuchi, V3890 Sagittarii and V745 Scorpii) at quiescence are presented in this study. The hot component ...
  • Recurrent novae: Single degenerate progenitors of Type Ia supernovae 
    Anupama, G. C; Pavana, M (Springer, 2020-12)
    Type Ia supernovae are the result of explosive thermonuclear burning in CO white dwarfs. The progenitors of the Ia supernovae are white dwarfs in an interacting binary system. The donor companion is either a degenerate ...
  • Recurrent Novae: What Do We Know about Them? 
    Anupama, G. C (Cambridge University Press, 2013-01)
    Recurrent novae (RNe) belong to the group of cataclysmic variables that exhibit nova outbursts at intervals on the order of decades. They are rare, with 10 Galactic RNe known to date. Two are known in the LMC, while there ...
  • Recurring coronal holes and their rotation rates during the solar cycles 22-24 
    Prabhu, K; Ravindra, B; Hegde, M; Doddamani, V. H (Springer, 2018-05)
    Coronal holes (CHs) play a significant role in making the Earth geo-magnetically active during the declining and minimum phases of the solar cycle. In this study, we analysed the evolutionary characteristics of the Recurring ...
  • Recurring homologous solar eruptions in NOAA AR 11429 
    Dhakal, Suman K; Zhang, Jie; Vemareddy, P; Nishu Karna (IOP Publishing, 2020-09-20)
    We present the study of three homologous solar eruptions from NOAA active region (AR) 11429 over four days. This large and complex AR is divided into two relatively simple subregions: northeast (NE) and southwest (SW). ...
  • Red and blue stars in the direction of the Large Magellanic Cloud 
    Parthasarathy, M (International Astronomical Union, 1978)
    The Large Magellanic Cloud has been surveyed on ultralow dispersion (10,000 A/mm) plates taken with the 102-centimeter reflector at Kavalur. Many new red and blue stars were found. The LMC bar was found to have a strong ...
  • Red and reddened stars in the region of Cygnus OB2 (VI Cygni) association 
    Parthasarathy, M; Jain, S. K (European Southern Observatory, 1995-06)
    From an ultra-low dispersion spectroscopic survey of the Cyg OB2 association several red and reddened stars are detected. Most of these stars appear to be reddened early-type stars belonging to the Cygnus OB2 association. ...
  • Red giants in the Small Magellanic Cloud – I. Disc and tidal stream kinematics 
    Dobbie, P. D; Cole, A. A; Subramaniam, A; Keller, S (Oxford University Press on behalf of the Royal Astronomical Society, 2014-08-01)
    We present results from an extensive spectroscopic survey of field stars in the Small Magellanic Cloud (SMC). 3037 sources, predominantly first-ascent red giants, spread across roughly 37.5 deg2, are analysed. The line-of-sight ...
  • Red giants in the Small Magellanic Cloud – II. Metallicity gradient and age–metallicity relation 
    Dobbie, P. D; Cole, A. A; Subramaniam, A; Keller, S (Oxford University Press on behalf of the Royal Astronomical Society, 2014-08-01)
    We present results from the largest Ca ii triplet line metallicity study of Small Magellanic Cloud (SMC) field red giant stars to date, involving 3037 objects spread across approximately 37.5 deg2, centred on this galaxy. ...
  • The red shift of the D lines of sodium in the Sun 
    Evershed, John (Royal Astronomical Society, 1938-01)

Search DSpace

Browse

My Account