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  • Filling factor determinations and their effects on planetary nebula studies 
    Mallik, D. C. V; Peimbert, M (Instituto de Astronomía, 1988-12)
    The authors have computed the filling factor for a sample of thirty-five galactic PN for which there are distance estimates independent of statistical arguments. They found that about half of the PN in their sample have ...
  • Filter disk rotator 
    Gupta, S. K; Nautiyal, S. L; Negi, B. S (Astronomical Society of India, 1994)
    A filter disk rotator has been designed and developed in the electronics laboratory of Uttar Pradesh State Observatory (UPSO) for photometric observations. A stepper motor is used to rotate the filter disk in the forward ...
  • Filters for NIR astronomical photometry: comparison of commercial IRWG filters and designs using OpenFilters 
    Mishra, Anwesh Kumar; Kamath, U. S (Indian Academy of Sciences, 2022-06)
    The photometric accuracy in the near-infrared (NIR) wavelength range (0.9–2.6 lm) is strongly affected by the variability of atmospheric transmission. The Infrared Working Group (IRWG) has recommended filters that help ...
  • The final state of an evaporating black hole and the dimensionality of the space-time 
    de Sabbata, V; Sivaram, C (D. Reidel Publishing Company, 1990)
  • Finding the Critical Decay Index in Solar Prominence Eruptions 
    Vasantharaju, N.; Vemareddy, P; Ravindra, B; Doddamani, V. H (IOP Publishing, 2019-11)
    The background fi eld is assumed to play a prime role in erupting structures like prominences. In the fl ux rope models, the critical decay index ( n c ) is a measure of the rate at which background fi eld ...
  • Fine and ultrafine particles at a near–free tropospheric environment over the high-altitude station Hanle in the trans-Himalaya: new particle formation and size distribution 
    Krishna Moorthy, K; Sreekanth, V; Jai Prakash, C; Gogoi, M. M; Suresh Babu, S; Sobhan Kumar, K; Bagare, S. P; Bhatt, B. C; Gaur, V. K; Prabhu, T. P; Shantikumar, N. S (American Geophysical Union, 2011-10)
    Number-size distributions of ultrafine, fine, and accumulation mode aerosols in the size range 5–1300 nm have been measured regularly from the pristine, high-altitude (for 4520 m above mean sea level) station Hanle in the ...
  • Fine image motion controler for Kodaikanal tunnel telescope 
    Thulasidharen, K. C; Prabhu, K; Rangarajan, K. E; Vasantharaju, N; Prabhu Ramkumar, B (Indian Institute of Astrophysics, 2013-05-06)
    Automation of the spectropolarimetric observations at Kodaikanal tunnel telescope needs placement of the Sun's image on the spectrograph slit and scanning it across the region of interest. This requirement can be achieved ...
  • Fine structure in solar decametric radiation 
    Thejappa, G; Sastry, Ch. V; Gopalswamy, N (Harwood Academic Publishers, 1984)
    Observations and interpretations of some of the fine structure in decametric solar radio emission -such as (1) the time structure of type III bursts, (2) absorption bursts, and (3) slowly drifting spikes -are presented. ...
  • Fine Structure in the Arc Spectra of Indium and Thallium 
    Narayan, A. L (Nature Publishing Group, 1931-10-17)
    Indium.-The hyperfine structures of a few indium arc lines have been reported by Jackson1 and McLennan.2 Jackson observed that each of the lines l2S½-22P½ and is a quartet; while McLennan observed only three components. ...
  • Fine- scale magnetic features in the solar atmosphere 
    Chitta, Lakshmi Pradeep (Indian Institute of Astrophysics, 2014-06)
    The surface of the Sun and solar-type stars is permeated by magnetic fields with a va- riety of spatial and temporal scales. The spatial scales range from sub-arcsec tangled fields that are yet to be observed (inaccessible ...
  • A Finite Classical Model of the Electron with Torsion and Strong Gravity 
    de Sabbata, V; Sivaram, C (John Wiley & Sons, Inc., 1990)
  • Finite temperature neutron matter and rotating neutron stars in the quark meson coupling model 
    Panda, P. K; Sahu, R; Das, C (The American Physical Society, 1999-09)
    A mean-field description of nonoverlaping nucleon bags bound by the self-consistent exchange of σ, ω, and ρ mesons is used to investigate the properties of neutron matter at finite temperature. We use the equation of state ...
  • The first aluminum coating of the 3700 mm primary mirror of the Devasthal Optical Telescope 
    Bheemireddy, K. R; Maheswar, G; Pant, J; Omar, A; Kumar, B; Uddin, W; Nirmal, K (SPIE-The International Society for Optical Engineering, 2016-07)
    Initially the primary mirror of the 3.6m Devasthal Optical Telescope is uncoated polished zerodur glass supplied by Lytkarino Optical Glass Factory, Russia/Advanced Mechanical and Optical Systems, Belgium. In order to do ...
  • First BISTRO Observations of the Dark Cloud Taurus L1495A-B10: The Role of the Magnetic Field in the Earliest Stages of Low-mass Star Formation 
    Ward-Thompson, Derek; Karoly, Janik; Pattle, Kate; Whitworth, Anthony; Kirk, Jason; Berry, David; Bastien, Pierre; Ching, Tao-Chung; Coude, Simon; Hwang, Jihye; Kwon, Woojin; Nakamura, Fumitaka; Kirchschlager, Florian; Kobayashi, Masato I. N; Koch, Patrick M; Kusune, Takayoshi; Kwon, Jungmi; Lacaille, Kevin; Law, Chi-Yan; Lee, Chang Won; Lee, Hyeseung; Hasegawa, Tetsuo; Lee, Yong-Hee; Nakanishi, Hiroyuki; Lee, Chin-Fei; Lee, Jeong-Eun; Li, Dalei; Li, Di; Li, Guangxing; Li, Hua-bai; Lin, Sheng-Jun; Liu, Hong-Li; Tram, Le Ngoc; Liu, Tie; Liu, Sheng-Yuan; Ngoc, Nguyen Bich; Liu, Junhao; Longmore, Steven; Lu, Xing; Lyo, A-Ran; Mairs, Steve; Matsumura, Masafumi; Matthews, Brenda; Tsukamoto, Yusuke; Ohashi, Nagayoshi; Onaka, Takashi; Park, Geumsook; Parsons, Harriet; Peretto, Nicolas; Archana Soam; Priestley, Felix; Pyo, Tae-Soo; Qian, Lei; Rao, Ramprasad; Viti, Serena; Rawlings, Jonathan; Rawlings, Mark; Rette, Brendan; Richer, John; Rigby, Andrew; Sadavoy, Sarah; Wang, Jia-Wei; Saito, Hiro; Savini, Giorgio; Seta, Masumichi; Wang, Hongchi; Shimajiri, Yoshito; Shinnaga, Hiroko; Tahani, Mehrnoosh; Tamura, Motohide; Tang, Ya-Wen; Tang, Xindi; Tomisaka, Kohji; Wu, Jintai; Xie, Jinjin; Yang, Meng-Zhe; Yen, Hsi-Wei; Yoo, Hyunju; Fuller, Gary; Yuan, Jinghua; Lai, Shih-Ping; Yun, Hyeong-Sik; Zenko, Tetsuya; Zhang, Guoyin; Zhang, Yapeng; Zhang, Chuan-Peng; Zhou, Jianjun; Zhu, Lei; de Looze, Ilse; Furuya, Ray; Andre, Philippe; Dowell, C. Darren; Qiu, Keping; Eden, David; Eyres, Stewart; Falle, Sam; Le Gouellec, Valentin J. M; Poidevin, Frederick; Robitaille, Jean-François; van Loo, Sven; Gledhill, Tim; Arzoumanian, Doris; Bourke, Tyler L; Byun, Do-Young; Chen, Huei-Ru Vivien; Chen, Wen Ping; Chen, Mike; Chen, Zhiwei; Cho, Jungyeon; Choi, Minho; Choi, Youngwoo; Graves, Sarah; Choi, Yunhee; Chrysostomou, Antonio; Chung, Eun Jung; Dai, Sophia; Debattista, Victor; Di Francesco, James; Diep, Pham Ngoc; Doi, Yasuo; Duan, Hao-Yuan; Duan, Yan; Greaves, Jane; Eswaraiah, Chakali; Fanciullo, Lapo; Fiege, Jason; Fissel, Laura M; Franzmann, Erica; Friberg, Per; Friesen, Rachel; Griffin, Matt; Gu, Qilao; Han, Ilseung; Hayashi, Saeko; Hoang, Thiem; Moriarty-Schieven, Gerald; Houde, Martin; Hull, Charles L. H; Inoue, Tsuyoshi; Inutsuka, Shu-ichiro; Iwasaki, Kazunari; Jeong, Il-Gyo; Johnstone, Doug; Konyves, Vera; Kang, Ji-hyun; Kang, Miju; Nagata, Tetsuya; Kataoka, Akimasa; Kawabata, Koji; Kemper, Francisca; Kim, Jongsoo; Kim, Shinyoung; Kim, Gwanjeong; Kim, Kyoung Hee; Kim, Mi-Ryang; Kim, Kee-Tae; Kim, Hyosung (American Astronomical Society, 2023-04-01)
    We present BISTRO Survey 850 μm dust emission polarization observations of the L1495A-B10 region of the Taurus molecular cloud, taken at the James Clerk Maxwell Telescope (JCMT). We observe a roughly triangular network ...
  • First detection of a magnetic field in low-luminosity B[e] stars New scenarios for the nature and evolutionary stages of FS CMa stars 
    Korcakova, D; Sestito, F; Manset, N; Kroupa, P; Votruba, V; Slechta, M; Danford, S; Dvorakova, N; Raj, A; Chojnowski, S. D; Singh, H. P (EDP Sciences, 2022-03)
    We report the first detection of the magnetic field in a star of FS CMa type, a subgroup of objects characterized by the B[e] phenomenon. The split of magnetically sensitive lines in IRAS 17449+2320 determines the magnetic ...
  • First evidence for anomalous thick crust beneath mid-Archean western Dharwar craton 
    Gupta, S; Rai, S. S; Prakasam, K. S; Srinagesh, D; Chadha, R. K; Priestley, K; Gaur, V. K (Indian Academy of Sciences, 2003-05-10)
    We report an anomalous present day crustal thickness of 43–52 km beneath the 3.4–3.0 Ga mid-Archean segment of the western Dharwar craton (WDC) undisturbed by Proterozoic events. In contrast, adjoining late-Archean ...
  • First evidence of the possible detection of diffuse circumstellar bands in AGB descendants 
    Di­az-Luis, J. J; Garcia-Hernandez, D. A; Kameswara Rao, N; Manchado, A; Cataldo, F (Societa Astronomica Italiana, 2016-06)
    The short transition phase between asymptotic giant branch stars (AGB; when circumstellar envelopes rich in small organic molecules are efficiently created) and planetary nebulae (PNe) represents a most active phase of ...
  • The First Extensive Exploration of UV-bright Stars in the Globular Cluster NGC 2808 
    Deepthi, S. Prabhu; Subramaniam, A; Snehalata Sahu (IOP Publishing, 2021-02-10)
    In this study, we identified and characterized the hot and luminous UV-bright stars in the globular cluster NGC 2808. We combined data from the Ultra Violet Imaging Telescope (UVIT) on board the Indian space satellite AstroSat ...
  • The First Gamma-Ray Emitting BL Lacertae Object at the Cosmic Dawn 
    Paliya, V. S; Dominguez, A; Cabello, C; Cardiel, N; Gallego, J; Siana, B; Ajello, M; Hartmann, D; de Paz, A. G; Stalin, C. S (IOP Publishing, 2020-11-01)
    One of the major challenges in studying the cosmic evolution of relativistic jets is the identification of the highredshift (z > 3) BL Lacertae objects (BL Lacs), a class of jetted active galactic nuclei characterized by ...
  • The first GeV outburst of the radio-loud narrow-line Seyfert 1 galaxy PKS 1502+036 
    Paliya, Vaidehi S; Stalin, C. S (IOP Publishing, 2016-03)
    The γ-ray-loud narrow-line Seyfert 1 (γ-NLSy1) galaxy PKS 1502+036 (z = 0.409) exhibited its first γ-ray outburst on 2015 December 20. In the energy range of 0.1–300 GeV, the highest flux measured by the Fermi-Large Area ...

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