Results 21 to 30 of about 59,640 (247)

On the α/Fe Bimodality of the M31 Disks

The Astrophysical Journal Letters, 2023
An outstanding question is whether the α /Fe bimodality exists in disk galaxies other than in the Milky Way. Here we present a bimodality using our state-of-the-art galactic chemical evolution models that can explain various observations in the Andromeda
Chiaki Kobayashi, Souradeep Bhattacharya, Magda Arnaboldi, Ortwin Gerhard   +3 more
doaj   +1 more source

Galaxy Formation and Chemical Evolution

International Journal of Astronomy and Astrophysics, 2014
14 pages, 5 ...
openaire   +3 more sources

The Chemical Evolution of the Draco Dwarf Spheroidal Galaxy [PDF]

, 2009
We present an abundance analysis based on high resolution spectra of 8 stars selected to span the full range in metallicity in the Draco dwarf spheroidal galaxy. We find [Fe/H] for the sample stars ranges from -1.5 to -3.0 dex.
Cohen, Judith G., Huang, Wenjin
core   +2 more sources

A High-precision Survey of the D/H Ratio in the Nearby Interstellar Medium

The Astrophysical Journal, 2023
We present high signal-to-noise ratio measurements of the H i Ly α absorption line toward 16 Galactic targets that are at distances between approximately 190 and 2200 pc, all beyond the wall of the Local Bubble.
Scott D. Friedman, Pierre Chayer, Edward B. Jenkins, Todd M. Tripp, Gerard M. Williger, Guillaume Hébrard, Paule Sonnentrucker   +6 more
doaj   +1 more source

Energetic constraints to chemo-photometric evolution of spiral galaxies [PDF]

, 2011
The problem of chemo-photometric evolution of late-type galaxies is dealt with relying on prime physical arguments of energetic self-consistency between chemical enhancement of galaxy mass, through nuclear processing inside stars, and luminosity ...
Alberto Buzzoni, Alibés, Arimoto, Arimoto, Arimoto, Arimoto, Baade, Barnes, Beers, Beers, Bessell, Blanton, Boissier, Boissier, Boselli, Brandt, Buzzoni, Buzzoni, Buzzoni, Buzzoni, Calzetti, Carigi, Carlberg, Carraro, Casagrande, Cayrel, Cellone, Chevalier, Chiappini, Clayton, Clegg, Cooper, Cowie, Dahlen, Dallaporta, de Vaucouleurs, Dopita, Dressler, Edvardsson, Ferrini, Firmani, Flynn, Friel, Fukugita, Garcia, Garnett, Gavazzi, Gavazzi, Gavazzi, Giavalisco, Gilmore, Giovagnoli, Gordon, Gorgas, Greggio, Greggio, Greggio, Grevesse, Hashimoto, Henry, Hillebrandt, Holmberg, Jablonka, Jablonka, Jonsell, Kasen, Kennicutt, Kennicutt, Kennicutt, Khokhlov, Kobayashi, Koeppen, Kroupa, Kroupa, Kuzio, Köppen, Larson, Larson, Larson, Lee, Leitherer, Lequeux, Maciel, Maeder, Maiolino, Mallik, Mannucci, Maoz, Marigo, Marino, Matteucci, Matteucci, Matteucci, Matteucci, Matteucci, Melchior, Meusinger, Mihara, Miller, Milone, Nepveu, Nepveu, Nittler, Nomoto, Nomoto, Nordström, Oey, Pagel, Pagel, Pagel, Pagel, Pagel, Panagia, Pardi, Paturel, Peimbert, Peimbert, Peimbert, Pilyugin, Portinari, Prantzos, Prantzos, Pérez, Reinecke, Renzini, Renzini, Rifatto, Roberts, Roberts, Rocha-Pinto, Rocha-Pinto, Romano, Ryan, Salpeter, Sandage, Sandage, Saviane, Scalo, Scannapieco, Scannapieco, Schmidt, Schmidt, Serrano, Smartt, Sommer-Larsen, Sullivan, Tasca, Thielemann, Thuan, Timmes, Tinsley, Tornambé, Tosi, Trimble, Tully, Tully, Twarog, van den, van der Kruit, van Zee, Weidemann, Wirth, Woosley, Woosley, Wyse, Wyse, Zaritsky   +166 more
core   +2 more sources

ChemicalUniverseMachine. I. Uncovering the Cosmic Evolution of Metals in the Galaxy–Interstellar Medium–Circumgalactic Medium Ecosystem

The Astrophysical Journal
We present an empirical chemical evolution model that explains the distribution of metals in the interstellar medium (ISM) and the circumgalactic medium (CGM) of galaxies based on the U niverse M achine and N eutral U niverse M achine models in the ...
Moka Nishigaki, Peter Behroozi, Masami Ouchi, Hong Guo, Rachel S. Somerville, Anna R. Gallazzi, Kimihiko Nakajima, Kuria Watanabe   +7 more
doaj   +1 more source

Self‐Powered Flexible Triboelectric‐Gated Ion‐Gel Transistor for Neuromorphic Tactile Sensing and Human Activity Recognition

Advanced Materials, EarlyView.
A fully flexible ion‐gel‐gated graphene‐channel transistor driven by a triboelectric nanogenerator enables self‐powered tactile sensing and synaptic learning. Mimicking spike‐rate‐dependent plasticity, the device exhibits frequency‐selective potentiation and depression, supporting rate‐coded neuromorphic computation even under flex.
Hanseong Cho, Seoyeon Park, Youngmin Lee, Sejoon Lee   +3 more
wiley   +1 more source

Figuring Out Gas and Galaxies In Enzo (FOGGIE). VIII. Complex and Stochastic Metallicity Gradients at z > 2

The Astrophysical Journal
Gas-phase metallicity gradients are a crucial element in understanding the chemical evolution of galaxies. We use the FOGGIE simulations to study the metallicity gradients (∇ Z ) of six Milky Way–like galaxies throughout their evolution.
Ayan Acharyya, Molly S. Peeples, Jason Tumlinson, Brian W. O’Shea, Cassandra Lochhaas, Anna C. Wright, Raymond C. Simons, Ramona Augustin, Britton D. Smith, Eugene Hyeonmin Lee   +9 more
doaj   +1 more source

Gas-phase Metallicity of Local Active Galactic Nuclei in the GASP and MaNGA Surveys: The Role of Ram Pressure Stripping

The Astrophysical Journal, 2023
Growing evidence in support of a connection between active galactic nuclei (AGN) activity and the ram pressure stripping (RPS) phenomenon has been found both observationally and theoretically in the past decades.
Giorgia Peluso, Mario Radovich, Alessia Moretti, Matilde Mingozzi, Benedetta Vulcani, Bianca M. Poggianti, Antonino Marasco, Marco Gullieuszik   +7 more
doaj   +1 more source

JINA-NuGrid Galactic Chemical Evolution Pipeline

, 2016
Galactic chemical evolution is a topic that involves nuclear physics, stellar evolution, galaxy evolution, observation, and cosmology. Continuous communication and feedback between these fields is a key component in improving our understanding of how ...
Côté, Benoit, Fryer, Chris L., Herwig, Falk, Jones, Samuel, O'Shea, Brian W., Pignatari, Marco, Ritter, Christian, Silvia, Devin   +7 more
core   +1 more source