Showing 7,941 - 7,960 results of 7,993 for search '"Galaxy"', query time: 0.13s Refine Results
  1. 7941

    Optimal PID tuning based on slope variation approach for position control of radio telescope by Mohamad Zaber, Nursaida

    Published 2016
    “…Radio telescope is an astronomical instrument used to study radio astronomy activities including observing the celestial activities such as sun, galaxies, pulsars, stars, monitor the submillimeter wavelength and many more. …”
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    Thesis
  2. 7942
  3. 7943

    The Intrinsic Statistical Properties and Correlations of Short Gamma-Ray Bursts by Si-Yuan Zhu, Zhi-Ying Liu, Yong-Rui Shi, Xiao-Kang Ding, Wan-Peng Sun, Fu-Wen Zhang

    Published 2023-01-01
    “…We report for the first time that there is a tighter correlation between the isotropic energy of the prompt emission of SGRBs and the star formation rate of their host galaxies, which reads $\mathrm{sSFR}\propto {E}_{\mathrm{iso}}^{0.38\pm 0.11}$ . …”
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    Article
  4. 7944
  5. 7945

    THE IDENTIFICATION OF z -DROPOUTS IN PAN-STARRS1: THREE QUASARS AT 6.5< z < 6.7 by Simcoe, Robert A., Chen, Shi-Fan S., Miller, Daniel Robert, Sullivan, Peter W.

    Published 2015
    “…Luminous distant quasars are unique probes of the high-redshift intergalactic medium (IGM) and of the growth of massive galaxies and black holes in the early universe. Absorption due to neutral hydrogen in the IGM makes quasars beyond a redshift of z ≃ 6.5 very faint in the optical z band, thus locating quasars at higher redshifts requires large surveys that are sensitive above 1 micron. …”
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    Article
  6. 7946

    Some Interacting Dark Energy Models by Martiros Khurshudyan, Asatur Zh. Khurshudyan

    Published 2018-11-01
    “…Using the differential age of old galaxies expressed in terms of <inline-formula> <math display="inline"> <semantics> <mrow> <mi>H</mi> <mo>(</mo> <mi>z</mi> <mo>)</mo> </mrow> </semantics> </math> </inline-formula> data, the peak position of baryonic acoustic oscillations (known as BAO data), the SN Ia data with strong gravitational lensing data, we obtain the best fit values of the model parameters for each case. …”
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    Article
  7. 7947
  8. 7948

    Fitting Type Ia Supernova Data to a Cosmological Model Based on Einstein–Newcomb–De Sitter Space by Vladimir N. Yershov

    Published 2023-04-01
    “…De Sitter also found that in a space with constant positive curvature, spectral lines of remote galaxies would be red-shifted (called the de Sitter effect). …”
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    Article
  9. 7949
  10. 7950
  11. 7951

    Confirmation of X-ray Absorption by Warm-hot Intergalactic Medium in the Sculptor Wall by Fang, Taotao, Buote, David A., Humphrey, Philip J., Canizares, Claude R., Zappacosta, Luca, Maiolino, Roberto, Tagliferri, Gianpiero, Gastaldello, Fabio

    Published 2011
    “…In a previous paper, we reported a 3σ detection of an absorption line from the warm-hot intergalactic medium (WHIM) using the Chandra and XMM X-ray grating spectra of the blazar H2356-309, the sight line of which intercepts the Sculptor Wall, a large-scale superstructure of galaxies at z ~ 0.03. To verify our initial detection, we obtained a deep (500 ks), follow-up exposure of H2356-309 as part of the Cycle-10 Chandra Large Project Program. …”
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    Article
  12. 7952

    Intermittency Scaling for Mixing and Dissipation in Rotating Stratified Turbulence at the Edge of Instability by Annick Pouquet, Duane Rosenberg, Raffaele Marino, Pablo Mininni

    Published 2023-08-01
    “…These are reminiscent of (but not identical to) previous findings for other variables and systems such as oceanic and atmospheric flows, climate re-analysis data, fusion plasmas, the Solar Wind, or galaxies. For QG forcing, sharp scaling transitions take place once the Ozmidov length scale <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>ℓ</mi><mrow><mi>O</mi><mi>z</mi></mrow></msub></semantics></math></inline-formula> is resolved—<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>ℓ</mi><mrow><mi>O</mi><mi>z</mi></mrow></msub></semantics></math></inline-formula> being the scale after which a turbulent Kolmogorov energy spectrum likely recovers at high <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>R</mi><mi>e</mi></mrow></semantics></math></inline-formula>.…”
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    Article
  13. 7953

    Determination of the Magnetic Field Strength and Geometry in the Accretion Disks of AGNs by Optical Spectropolarimetry by Mikhail Piotrovich, Stanislava Buliga, Tinatin Natsvlishvili

    Published 2021-06-01
    “…Based on the spectropolarimetric data of 33 Seyfert type 1 galaxies observed with the BTA-6m telescope of the Special Astrophysical Observatory, we estimated the magnetic field values at the event horizon of the supermassive black hole <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>B</mi><mi mathvariant="normal">H</mi></msub></semantics></math></inline-formula> and the exponents of the power-law dependence <i>s</i> of the magnetic field on the radius. …”
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    Article
  14. 7954

    PHILOSOPHY OF PERCEPTION OF THE WORLD IN THE INFORMATION AGE by M. S. Kravets

    Published 2018-03-01
    “…The presence of an edge or a limit, to which the galaxies have moved apart at a present point in time, would mean the restriction of the existence of space itself. …”
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    Article
  15. 7955
  16. 7956

    The R136 star cluster hosts several stars whose individual masses greatly exceed the accepted 150 M-circle dot stellar mass limit by Crowther, P.A., Schnurr, O., Hirschi, R., Yusof, N., Parker, R.J., Goodwin, S.P., Abu Kassim, H.

    Published 2010
    “…The potential for stars greatly exceeding 150 M-circle dot within metal-poor galaxies suggests that such pair-instability supernovae could occur within the local universe, as has been claimed for SN 2007bi.…”
    Article
  17. 7957
  18. 7958
  19. 7959
  20. 7960

    Mapping the Galactic Metallicity Gradient with Open Clusters: The State-of-the-Art and Future Challenges by Lorenzo Spina, Laura Magrini, Katia Cunha

    Published 2022-01-01
    “…Finally, we compare the shape of the galactic radial metallicity gradient to those of other spiral galaxies.…”
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    Article