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Semianalytical Fokker–Planck Models for Nuclear Star Clusters
Published 2025-01-01Subjects: “…Galaxy nuclei…”
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122
Astronomical Signatures of Dark Matter
Published 2014-01-01“…They are very high velocities of individual galaxies within clusters of galaxies, higher than expected rotation rates of stars in the outer regions of galaxies, 21 cm line studies indicative of increasing mass to light ratios with radius in the halos of spiral galaxies, hot gaseous X-ray emitting halos around many elliptical galaxies, and clusters of galaxies requiring a much larger component of unseen mass for the hot gas to be bound. …”
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123
Bose-Einstein Condensate Dark Matter Halos Confronted with Galactic Rotation Curves
Published 2017-01-01“…In the second class the rotational velocity of HSB and LSB galaxies exhibits long flat plateaus, resulting in better fit with the NFW model for HSB galaxies and comparable fits for LSB galaxies. …”
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124
Modified Newtonian Dynamics: A Falsification of Cold Dark Matter
Published 2009-01-01“…The fact that it works very well on the scale of galaxies is problematic for cold dark matter (CDM). …”
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125
Are Nuclear Star Clusters the Precursors of Massive Black Holes?
Published 2012-01-01“…We present new upper limits for black hole masses in extremely late type spiral galaxies. We confirm that this class of galaxies has black holes with masses less than 106M⊙, if any. …”
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126
Recoiling Black Holes: Electromagnetic Signatures, Candidates, and Astrophysical Implications
Published 2012-01-01“…Long-lived oscillations of the SMBHs in galaxy cores, and in rare cases even SMBH ejections from their host galaxies, are the consequence. …”
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127
Exact Relativistic Magnetized Haloes around Rotating Disks
Published 2015-01-01“…The study of the dynamics of magnetic fields in galaxies is one of important problems in formation and evolution of galaxies. …”
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128
The Extraordinary Long-lasting Infrared Echo of PS16dtm Reveals an Extremely Energetic Nuclear Outburst
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129
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131
The Natural Science Underlying Big History
Published 2014-01-01“…Nature’s many varied complex systems—including galaxies, stars, planets, life, and society—are islands of order within the increasingly disordered Universe. …”
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132
The Low-Mass End of the MBH/Mhost Relation in Quasars
Published 2012-01-01“…Host galaxy luminosities and stellar masses are computed, under reasonable assumptions on their star formation histories. …”
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133
The Roles of Cultural Astronomy in Kigezi Rigion.
Published 2024“…Astronomy is a science discipline that studies virtually everything beyond the earth, which includes studying planets, stars, galaxies, nebulae, and the universe at large. The purpose of this study was to explore the roles of cultural astronomy in Kigezi sub-region.…”
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134
Rates of Stellar Tidal Disruption Events around Intermediate-mass Black Holes
Published 2025-01-01“…In this work, we aim to accurately calculate the IMBH TDE rates based on their black hole (BH) masses and the stellar profiles of their host galaxies obtained from the latest observations. We find that the TDE rate per galaxy for IMBHs in the center of small galaxies is similar to that of SMBH TDEs, while the TDE rate per cluster from IMBHs in globular clusters is much lower. …”
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135
Thermodynamics of the substantial universe
Published 2024-06-01“…The main reason for the redshift of spectral lines of light from distant stars and galaxies is not the expansion of the substantial Universe, but its clouds of gas and dust, which reduce the energy of photons.…”
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136
A Numerical Convolution Representation of Potential for a Disk Surface Density in 3D
Published 2014-01-01“…This study presents a numerical convolution representation of a potential induced from a disk of surface density, which has often been investigated in the center region of galaxies. The advantage of this representation is to release the softening length for the N-body method and artificial boundary conditions for the spectral methods. …”
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137
Evaluation of the Single-component Thermal Dust Emission Model in Cosmic Microwave Background Experiments
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138
Non-Gaussianity from Large-Scale Structure Surveys
Published 2010-01-01“…With the advent of galaxy surveys which provide large samples of galaxies or galaxy clusters over a volume comparable to the horizon size (SDSS-III, HETDEX, Euclid, JDEM, LSST, Pan-STARRS, CIP, etc.) or mass-selected large cluster samples over a large fraction of the extra-galactic sky (Planck, SPT, ACT, CMBPol, B-Pol), it is timely to investigate what constraints these surveys can impose on primordial non-Gaussianity. …”
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139
Null Geodesics and Strong Field Gravitational Lensing of Black Hole with Global Monopole
Published 2015-01-01“…We then find Einstein rings, magnifications, and observables of the relativistic images for supermassive black hole at the center of galaxy NGC4486B. We also examine time delays for different galaxies and present our results numerically. …”
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140
On the Jeans Theorem and the “Tolman–Oppenheimer–Volkoff Equation” in R2 Gravity
Published 2016-01-01“…Corda, Mosquera Cuesta, and Lorduy Gòmez have shown that spherically symmetric stationary states can be used as a model for galaxies in the framework of the linearized R2 gravity. …”
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