Results 11 to 20 of about 840 (235)
Origins of the Evil Eye: M64's Stellar Halo Reveals the Recent Accretion of an SMC-mass Satellite
The Astrophysical Journal Letters, 2023 M64, often called the “Evil Eye” galaxy, is unique among local galaxies. Beyond its dramatic, dusty nucleus, it also hosts an outer gas disk that counter-rotates relative to its stars.
Adam Smercina +11 more
doaj +1 more source
Chemie Ingenieur Technik, EarlyView., 2023 Let us consider an alternative perspective on climate change: The sum of solar radiation and heat generated by human activity result in a net energy input of 1.96 times that of the Sun on the Earth's surface. The expanding global population is expected to exacerbate this issue. Potential solutions are proposed, including replacement and heat recycling.
Martin Bertau, Gerald Steiner
wiley +1 more source
Revealing the Galaxy–Halo Connection through Machine Learning
The Astrophysical Journal, 2023 Understanding the connections between galaxy stellar mass, star formation rate, and dark matter halo mass represents a key goal of the theory of galaxy formation. Cosmological simulations that include hydrodynamics, physical treatments of star formation,
Ryan Hausen +7 more
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The Outer Halos of Very Massive Galaxies: BCGs and their DSC in the Magneticum Simulations
Galaxies, 2017 Recent hydrodynamic cosmological simulations cover volumes up to Gpc 3 and resolve halos across a wide range of masses and environments, from massive galaxy clusters down to normal galaxies, while following a large variety of physical processes ...
Rhea-Silvia Remus +2 more
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The “Building Blocks” of Stellar Halos
Galaxies, 2017 The stellar halos of galaxies encode their accretion histories. In particular, the median metallicity of a halo is determined primarily by the mass of the most massive accreted object.
Kyle A. Oman +2 more
doaj +1 more source
TREX: Kinematic Characterization of a High-dispersion Intermediate-age Stellar Component in M33
The Astrophysical Journal, 2023 The dwarf galaxy Triangulum (M33) presents an interesting testbed for studying stellar halo formation: it is sufficiently massive so as to have likely accreted smaller satellites, but also lies within the regime where feedback and other “in situ ...
L. R. Cullinane +9 more
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Environmental Dependence of the Mass–Metallicity Relation in Cosmological Hydrodynamical Simulations
The Astrophysical Journal, 2023 We investigate the environmental dependence of the gas-phase metallicity for galaxies at z = 0 to z ≳ 2 and the underlying physical mechanisms driving this dependence using state-of-the-art cosmological hydrodynamical simulations.
Kai Wang, Xin Wang, Yangyao Chen
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The Baryonic Halos of Isolated Elliptical Galaxies
Galaxies, 2017 Without the interference of a number of events, galaxies may suffer in crowded environments (e.g., stripping, harassment, strangulation); isolated elliptical galaxies provide a control sample for the study of galaxy formation.
Ricardo Salinas +5 more
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The Progenitor of the Peculiar Galaxy NGC 3077
The Astrophysical Journal, 2023 We present a study of the structural properties and metallicity distribution of the nearby peculiar galaxy NGC 3077. Using data from our survey of the M81 Group with the Hyper Suprime-Cam on board the Subaru Telescope, we construct deep color–magnitude ...
Sakurako Okamoto +4 more
doaj +1 more source
Regulation of Star Formation by a Hot Circumgalactic Medium
The Astrophysical Journal, 2023 Galactic outflows driven by supernovae (SNe) are thought to be a powerful regulator of a galaxy’s star-forming efficiency. Mass, energy, and metal outflows ( η _M , η _E , and η _Z , here normalized by the star formation rate, the SNe energy, and metal ...
Christopher Carr +4 more
doaj +1 more source