Showing 1 - 20 results of 223 for search 'Distance measures (cosmology)', query time: 0.44s Refine Results
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    Testing the consistency between cosmological measurements of distance and age by Remya Nair, Sanjay Jhingan, Deepak Jain

    Published 2015-05-01
    “…We present a model independent method to test the consistency between cosmological measurements of distance and age, assuming the distance duality relation. …”
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    Article
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    An Introduction to Distance Measurement in Astronomy / by De Grijs, Richard, 1969-, author 521254

    Published 2011
    “…Distance determination is an essential technique in astronomy, and is briefly covered in most textbooks on astrophysics and cosmology. …”
    text
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    Cosmological Distance Measurement of Twelve Nearby Supernovae IIP with ROTSE-IIIb by G. Dhungana, R. Kehoe, R. Staten, J. Vinko, J. C. Wheeler, C. Akerlof, D. Doss, F. V. Ferrante, C. A. Gibson, J. Lasker, G. H. Marion, S. B. Pandey, R. M. Quimby, E. Rykoff, D. Smith, F. Yuan, W. Zheng

    Published 2024-01-01
    “…We then perform cosmological parameter fitting using these EPM distances, from which we measure the Hubble constant to be ${72.9}_{-4.3}^{+5.7}\,\mathrm{km}\,{{\rm{s}}}^{-1}\,{\mathrm{Mpc}}^{-1}$ , which is consistent with the standard ΛCDM model values derived using other independent techniques.…”
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    Solar System-scale Interferometry on Fast Radio Bursts Could Measure Cosmic Distances with Subpercent Precision by Kyle Boone, Matthew McQuinn

    Published 2023-01-01
    “…If the spacetime positions of the detectors are known to a few centimeters, comparable to the accuracy to which very long baseline interferometry baselines and global navigation satellite systems (GNSS) geolocations are constrained, nanosecond timing would allow competitive cosmological constraints. We show that a four-detector constellation at Solar radii of ≳10 au could measure geometric distances to individual sources with subpercent precision. …”
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    Article
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    Extreme Quasars as Distance Indicators in Cosmology by Deborah Dultzin, Paola Marziani, J. A. de Diego, C. A. Negrete, Ascensión Del Olmo, Mary L. Martínez-Aldama, Mary L. Martínez-Aldama, Mauro D'Onofrio, Edi Bon, Natasa Bon, Giovanna M. Stirpe

    Published 2020-01-01
    “…As a result of the small scatter in Eddington ratio shown by xA quasars, we propose a method to derive the main cosmological parameters based on redshift-independent “virial luminosity” estimates from measurements of emission line widths, roughly equivalent to the luminosity estimates based from line width in early and late type galaxies. …”
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    Entropy Measures as Geometrical Tools in the Study of Cosmology by Gilbert Weinstein, Yosef Strauss, Sergey Bondarenko, Asher Yahalom, Meir Lewkowicz, Lawrence Paul Horwitz, Jacob Levitan

    Published 2017-12-01
    “…The Raychaudhuri equations are strong geometrical tools in the study of general relativity and cosmology. We suggest a refined entropy measure applicable in cosmology and defined by the average deviation of the geodesics in a congruence.…”
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    A Scale-Dependent Distance Functional between Past Light Cones in Cosmology by Mauro Carfora, Francesca Familiari

    Published 2022-12-01
    “…We express this harmonic map-type functional in terms of the physical quantities that characterize the actual measurements along our past light cone, namely the area distance and the lensing distortion, also addressing the very delicate problem of the presence of light cone caustics. …”
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    The Planetary Nebula Luminosity Function in the Era of Precision Cosmology by Robin Ciardullo, Robin Ciardullo

    Published 2022-05-01
    “…If these issues can be understood, then the PNLF can provide a useful cross-check on distance measurements out to ∼40 Mpc.…”
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    Article
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    Determining Evolution of Cosmological Constant, Gravitational Constant and Speed of Light Using Nonadiabatic Cosmological Model and LLR Findings by Rajendra P. Gupta

    Published 2019-06-01
    “…Thus, the new model may be considered robust and reliable enough for predicting distances of radiation emitting extragalactic redshift sources for which luminosity distance measurement may be difficult, unreliable, or no longer possible.…”
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    Swampland distance conjecture, inflation and α-attractors by Marco Scalisi, Irene Valenzuela

    Published 2019-08-01
    “…Furthermore, we argue that a proper string realisation of these cosmological models in Calabi-Yau manifolds should occur around infinite field distance singularities. …”
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    The Supernova Legacy Survey 3-year sample: Type Ia supernovae photometric distances and cosmological constraints by Guy, J, Sullivan, M, Conley, A, Regnault, N, Astier, P, Balland, C, Basa, S, Carlberg, R, Fouchez, D, Hardin, D, Hook, I, Howell, D, Pain, R, Palanque-Delabrouille, N, Perrett, K, Pritchet, C, Rich, J, Ruhlmann-Kleider, V, Balam, D, Baumont, S, Ellis, R, Fabbro, S, Fakhouri, H, Fourmanoit, N, González-Gaitán, S

    Published 2010
    “…We present photometric properties and distance measurements of 252 high redshift Type Ia supernovae (0.15 < z < 1.1) discovered during the first three years of the Supernova Legacy Survey (SNLS). …”
    Journal article