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  • Megha, A; Sampoorna, M; Nagendra, K. N; Anusha, L. S; Sankarasubramanian, K (IOP Publishing, 2020-11-01)
    For a more precise modeling of polarized spectral lines formed in extended and expanding stellar atmospheres, the solution of the radiative transfer equation for the Stokes vectors must be obtained in a spherical geometry ...
  • Mahender, A; Sasikumar Raja, K; Ramesh, R; Panditi, V; Monstein, C; Yellaiah, G (Springer, 2020-11)
    We have studied low-frequency (45 – 410 MHz) type III solar radio bursts observed using the e-Compound Astronomical Low-cost Low-frequency Instrument for Spectroscopy and Transportable Observatory (e-CALLISTO) spectrometer ...
  • Bharat Kumar, Y; Reddy, B. E; Campbell, S. W; Maben, Sunayana; Zhao, G; Ting, Yuan-Sen (Springer Nature, 2020-11)
    The vast majority of stars with mass similar to that of the Sun are expected to destroy lithium (Li) gradually over the course of their lives, via low-temperature nuclear burning. This has now been supported by observations ...
  • Ningombam, S. S; Sethulakshmy, E. S; Jade, S; Shrungeshwara, T. S; Vivek, C. G; Angchuk, D; Prabhu, T. P; Mahay, T. T (Elsevier B.V., 2020-10-15)
    The present work reports atmospheric opacity at 220 GHz over Indian Astronomical Observatory (IAO)-Hanle during 2006 to 2018. The opacity data were derived from the radiometric measurement of sky-brightness temperature as ...
  • Shantikumar, N. S; Sethulakshmy, E. S; Sridevi, Jade; Shrungeshwara, T. S; Vivek, C. G; Angchuk, Dorje; Prabhu, T. P; Tshering Mahay, Tashi (Elsevier B. V., 2020-10-15)
    The present work reports atmospheric opacity at 220 GHz over Indian Astronomical Observatory (IAO)-Hanle during 2006 to 2018. The opacity data were derived from the radiometric measurement of sky-brightness temperature as ...
  • Mordvinov, A. V; Binay Karak, B; Banerjee, D; Chatterjee, S; Golubeva, E. M; Khlystova, A. I (IOP Publishing, 2020-10-10)
    The regular observation of the solar magnetic field is available only for about the last five cycles. Thus, to understand the origin of the variation of the solar magnetic field, it is essential to reconstruct the magnetic ...
  • du Mas des Bourboux, H; Rich, J; Font-Ribera, A; de Sainte Agathe, V; Farr, J; Etourneau, T; Le Goff, J.-M; Cuceu, Andrei; Balland, C; Bautista, J. E; Blomqvist, M; Brinkmann, J; Brownstein, J. R; Chabanier, S; Chaussidon, E; Dawson, K; Gonzalez-Morales, A. X; Guy, J; Lyke, B. W; de la Macorra, A; Mueller, E.-M; Myers, A. D; Nitschelm, C; Gutierrez, A. M; Palanque-Delabrouille, N; Parker, J; Percival, W. J; Perez-Rafols, I; Petitjean, P; Pieri, M. M; Ravoux, R; Rossi, R; Schneider, D. P; Seo, H.-J; Slosar, A; Stermer, J; Vivek, M; Yeche, C; Youles, S (IOP Publishing, 2020-10-01)
    We present a measurement of baryonic acoustic oscillations (BAOs) from Lyα absorption and quasars at an effective redshift z = 2.33 using the complete extended Baryonic Oscillation Spectroscopic Survey (eBOSS). The 16th ...
  • Shejeelammal, J; Goswami, A; Goswami, P. P; Rathour, R. S; Masseron, T (Oxford University Press on behalf of the Royal Astronomical Society, 2020-10)
    Barium stars are one of the important probes to understand the o rigin and evolution of slow neutron-capture process elements in the Galaxy. These are e xtrinsic stars, where the observed s-process element abundances ...
  • Anupama, G. C (Indian Physics Association, 2020-10)
    The Nobel Prize in Physics 2020 has been awarded to three scientists. One half of the prize was awarded to Roger Penrose and the other half was jointly awarded to Reinhard Genzel and Andrea Ghez. Penrose’s discovery of ...
  • Dutta, Jayanta; Sur, Sharanya; Stacy, Athena; Bagla, Jasjeet Singh (IOP Publishing, 2020-09-20)
    Recent numerical simulations have suggested the probability of a fraction of the primordial stars being ejected from the cluster of their origin. We explore the possibility that some of these can remain on the main sequence ...
  • Dumka, U. C; Shantikumar, N. S; Kaskaoutis, D. G; Madhavan, B. L; Song, H. -J; Angchuk, D; Jorphail, S (Elsevier B. V, 2020-09-10)
    Analysis of the climatology of aerosol properties is performed over Hanle (4500 m) and Merak (4310 m), two remote-background sites in the western trans-Himalayas, based on eleven years (2008–2018) of sun/sky radiometer ...
  • Rebecca, L; Arun, K; Sivaram, C (Springer, 2020-09)
    In recent papers, it was shown explicitly that the sizes of gravitationally bound large-scale cosmic structures can be constrained from the requirement that their gravitational binding self-energy density should at least ...
  • Gangopadhyay, A; Misra, K; Sahu, D. K; Wang, Shan-Qin; Kumar, Brajesh; Li, Long; Anupama, G. C; Dastidar, R; Elias-Rosa, N; Kumar, Brijesh; Singh, Mridweeka; Pandey, S. B; Sanwal, Pankaj; Singh, A; Srivastav, S; Tartaglia, L; Tomasella, L (Oxford University Press on behalf of the Royal Astronomical Society, 2020-09)
    We present the photometric and spectroscopic studies of a Type Ib SN 2015ap and a Type Ic SN 2016P. SN 2015ap is one of the bright (MV = −18.04 mag) Type Ib while SN 2016P lies at an average value among the Type Ic SNe (MV ...
  • Barway, S; Mayya, Y. D; Robleto-Orus, Aitor (Oxford University Press on behalf of the Royal Astronomical Society, 2020-09)
    We report the discovery of a bar, a pseudo-bulge, and unresolved point source in the archetype collisional ring galaxy Cartwheel using careful morphological analysis of a near-infrared (NIR) Ks-band image of excellent ...
  • Raju, K. P (IOP Publishing, 2020-08-20)
    Supergranulation is the horizontal velocity pattern on the solar surface with a typical size of 30,000 km and a lifetime of 24 hr. The network structure seen in chromospheric lines, such as Ca ii K 3934 Å, is the manifestation ...
  • Shantikumar, S. N; Narendra, A; Bhatt, B. C; Prabhu, T. P; Anupama, G. C; Angchuk, D; Jorphail, S (Elsevier B.V, 2020-08-15)
    We report for validation of cloud fraction estimated from high-resolution (hourly) data from MERRA-2 and AIRS instrument aboard NASA’s Aqua satellite during its ascending and descending orbits with hourly ground-based ...
  • Bandyopadhyay, A; Sivarani, T; Beers, C. T (IOP Publishing, 2020-08-10)
    We present a study on the detailed chemical abundances of five new relatively bright r-process-enhanced stars that were initially observed as part of the SDSS/MARVELS pre-survey. These stars were selected, on the basis ...
  • Majumdar, S; Pant, V; Ritesh Patel; Banerjee, D (IOP Publishing, 2020-08-10)
    Since coronal mass ejections (CMEs) are the major drivers of space weather, it is crucial to study their evolution starting from the inner corona. In this work we use graduated cylindrical shell model to study the 3D ...
  • Kataria, Sandeep Kumar (EDP Sciences, 2020-08)
    Earlier studies have shown that massive bulges impede bar formation in disk galaxies. Recent N-body simulations have derived a bar formation criterion that depends on the radial bulge force in a galaxy disk. We use those ...
  • Lyke, Brad W; Higley, Alexandra N; McLane, J. N; Schurhammer, D. P; Myers, A. D; Ross, A. J; Dawson, K; Chabanier, S; Martini, P; Busca, N. G; Mas des Bourboux, Helion du; Salvato, Mara; Streblyanska, A; Zarrouk, P; Burtin, E; Anderson, S. F; Bautista, J; Bizyaev, D; Brandt, W. N; Brinkmann, J; Brownstein, J. R; Comparat, J; Green, Paul; de la Macorra, Axel; Munoz Gutierrez, Andrea; Hou, Jiamin; Newman, J. A; Palanque-Delabrouille, N; Paris, I; Percival, W. J; Petitjean, P; Rich, J; Rossi, G; Schneider, D. P; Smith, Alexander; Vivek, M; Weaver, Benjamin A (IOP Publishing, 2020-08)
    We present the final Sloan Digital Sky Survey IV (SDSS-IV) quasar catalog from Data Release 16 of the extended Baryon Oscillation Spectroscopic Survey (eBOSS). This catalog comprises the largest selection of spectroscopically ...

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