Search Results - "Chanda, J J"
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Detection of a slow H i bar in the dwarf irregular galaxy DDO 168
Published in Monthly notices of the Royal Astronomical Society (01-10-2019)“…We examine the H i total intensity maps of the VLA LITTLE-THINGS galaxies and identify an H i bar in the dwarf irregular galaxy DDO 168 which has a dense and…”
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Vertical stellar density distribution in a non-isothermal galactic disc
Published in Monthly notices of the Royal Astronomical Society (01-12-2020)“…ABSTRACT The vertical density distribution of stars in a galactic disc is traditionally obtained by assuming an isothermal vertical velocity dispersion of…”
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General model of vertical distribution of stars in the Milky Way using complete Jeans equations
Published in Monthly notices of the Royal Astronomical Society (01-02-2020)“…The self-consistent vertical density distribution in a thin, isothermal disc is typically given by a sech2 law, as shown in the classic work by Spitzer. This…”
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Observational evidence for local vertical constraining of H i by molecular cloud complexes
Published in Monthly notices of the Royal Astronomical Society (01-03-2024)“…ABSTRACT A massive molecular cloud complex represents local gravitational potential that can constrain the vertical distribution of surrounding stars and gas…”
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Dynamical effect of gas on spiral pattern speed in galaxies
Published in Monthly notices of the Royal Astronomical Society (11-07-2016)“…In the density wave theory of spiral structure, the grand-design two-armed spiral pattern is taken to rotate rigidly in a galactic disc with a constant,…”
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Role of gas in supporting grand spiral structure
Published in Monthly notices of the Royal Astronomical Society (01-08-2015)“…The density wave theory for the grand-design two-armed spiral pattern in galaxies is successful in explaining several observed features. However, the long-term…”
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Lopsided spiral galaxies
Published in Physics reports (01-02-2009)“…The light distribution in the disks of many galaxies is ‘lopsided’ with a spatial extent much larger along one half of a galaxy than the other, as seen in…”
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Why are some galaxy discs extremely thin?
Published in Monthly notices of the Royal Astronomical Society (01-05-2013)“…Some low-surface-brightness galaxies are known to have extremely thin stellar discs with the vertical-to-planar axes ratio 0.1 or less, often referred to as…”
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Suppression of gravitational instabilities by dominant dark matter halo in low-surface-brightness galaxies
Published in Monthly notices of the Royal Astronomical Society (21-03-2014)“…The low-surface-brightness galaxies are gas rich and yet have a low star formation rate; this is a well-known puzzle. The spiral features in these galaxies are…”
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Genesis of morpho-kinematic lopsidedness in minor merger of galaxies
Published in Monthly notices of the Royal Astronomical Society (09-03-2022)“…ABSTRACT An m = 1 lopsided asymmetry is common in disc galaxies. Here, we investigate the excitation of an m = 1 lopsidedness in host galaxies during minor…”
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Gas-dust correlations in nearby galaxies: a case study of NGC 3184 and NGC 7793
Published in Monthly notices of the Royal Astronomical Society (01-02-2020)“…ABSTRACT The study of gas-dust interactions occurring in the interstellar medium of a galaxy is essential for understanding various physical processes taking…”
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Angular momentum transport and evolution of lopsided galaxies
Published in Monthly notices of the Royal Astronomical Society (11-10-2014)“…The surface brightness distribution in the majority of stellar galactic discs falls off exponentially. Often what lies beyond such a stellar disc is the…”
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Theoretical determination of Hi vertical scale heights in the dwarf galaxies DDO154, HoII, IC2574 and NGC2366
Published in Monthly notices of the Royal Astronomical Society (21-07-2011)“…ABSTRACT In this paper, we model dwarf galaxies as a two-component system of gravitationally coupled stars and atomic hydrogen gas in the external force field…”
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The ecosystem service of property protection and exposure to environmental stressors in the Gulf of Mexico
Published in Ocean & coastal management (01-02-2020)“…Environmental stressors such as sea-level rise, erosion, and increased storm frequency and intensity are exposing coastal properties to greater amounts of…”
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Effect of dark matter halo on global spiral modes in galaxies
Published in Monthly notices of the Royal Astronomical Society (11-02-2016)“…Low surface brightness (LSB) galaxies form a major class of galaxies, and are characterized by low disc surface density and low star formation rate. These are…”
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The Flattened Dark Matter Halo of M31 as Deduced from the Observed H I Scale Heights
Published in The Astrophysical journal (20-09-2008)“…In this paper we use the outer galactic H i scale height data as well as the observed rotation curve as constraints to determine the halo density distribution…”
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Linking people to coastal habitats: A meta-analysis of final ecosystem goods and services on the coast
Published in Ocean & coastal management (01-11-2018)“…Coastal ecosystem goods and services (EGS) have steadily gained traction in the scientific literature over the last few decades, providing a wealth of…”
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Dark matter dominance at all radii in the superthin galaxy UGC 7321
Published in New astronomy (01-01-2010)“…We model the shape and density profile of the dark matter halo of the low surface brightness, superthin galaxy UGC 7321, using the observed rotation curve and…”
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Response of a galactic disc to vertical perturbations: strong dependence on density distribution
Published in Monthly notices of the Royal Astronomical Society (21-07-2010)“…We study the self-consistent, linear response of a galactic disc to non-axisymmetric perturbations in the vertical direction as due to a tidal encounter, and…”
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The Origin of Steep Vertical Stellar Distribution in the Galactic Disk
Published in The Astrophysical journal (10-06-2007)Get full text
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