Results 41 to 50 of about 5,149 (236)
The Hβ Index and the Ages of Old Stellar Systems [PDF]
Journal of Astronomy and Space Sciences, 1998 The Hβ and some metal line indices, such as Mg2, Fe52, Fe53 of single-age and single-metallicity populations are computed based on the method of evolutionary population synthesis, with careful consideration of the variation of the horizontal-branch ...
Seok-Jin Yoon +2 more
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The Astrophysical Journal, 2023 With Cosmicflows- 4, distances are compiled for 55,877 galaxies gathered into 38,065 groups. Eight methodologies are employed, with the largest numbers coming from the correlations between the photometric and kinematic properties of spiral galaxies (TF ...
R. Brent Tully +16 more
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The ‘Photometric Plane’ of elliptical galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2002 To appear in MNRAS.
openaire +5 more sources
On the distribution of galaxy ellipticity in clusters [PDF]
Monthly Notices of the Royal Astronomical Society, 2015 14 pages, 11 figures, Accepted for publication in ...
Rebecca Davies +4 more
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Equilibrium Figures inside the Dark-Matter Ring and the Shapes of Elliptical Galaxies
Open Astronomy, 2015 We solve the general problem of the theory of equilibrium figures and analyze two classes of liquid rotating gravitating figures residing inside a gravitating ring or torus.
Kondratyev B. P. +2 more
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Resolving the Extended Stellar Halos of Nearby Galaxies: The Wide-Field PISCeS Survey
Galaxies, 2017 The wide-field Panoramic Imaging Survey of Centaurus and Sculptor (PISCeS) investigates the resolved stellar halos of two nearby galaxies (the spiral NGC 253 and the elliptical Centaurus A, D ∼ 4 Mpc) out to a galactocentric radius of 150 kpc ...
Denija Crnojević
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Stable models of elliptical galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2003 26 ...
Gerhard Rein, Yan Guo
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Weak homology of elliptical galaxies [PDF]
Astronomy & Astrophysics, 2002 We start by studying a small set of objects characterized by photometric profiles that have been pointed out to deviate significantly from the standard R^{1/4} law. For these objects we confirm that a generic R^{1/n} law, with n a free parameter, can provide superior fits (the best-fit value of n can be lower than 2.5 or higher than 10), better than ...
Bertin, G., Ciotti, L., Del Principe, M.
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The habitability of large elliptical galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2020 ABSTRACT Based on numbers of stars, supernova rates, and metallicity, a prior study concluded that large elliptical galaxies contain up to 10 000 times more habitable planets than the Milky Way and are thus the ‘cradles of life’. Using the results of their model and taking into account galactic number distributions and supernova rates, I
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New Arabic Records From Cairo on Supernovae 1181 and 1006
Astronomische Nachrichten, EarlyView.ABSTRACT The remnant of the historical supernova SN 1181 is under discussion: While the previously suggested G130.7+3.1 (3C58) appears too old (3000–5000 year), the unusual star IRAS00500+6713 with a surrounding nebula (Pa‐30) has an expansion age not inconsistent with a SN Iax explosion in ad 1181 under the assumption that neither acceleration nor ...
J. G. Fischer +3 more
wiley +1 more source