Results 111 to 120 of about 5,332 (183)

A Wave-corrected Assessment of the Local Midplane

The Astrophysical Journal
As the number of known Galactic structures mounts thanks to the Gaia Space Telescope, it is now pertinent to study methods for disentangling structures occupying the same regions of the Milky Way. Indeed, understanding the precise form of each individual
Ziyuan Yin, Austin Hinkel
doaj   +1 more source

Glance: A Comprehensive Framework for Galactic Archaeology

accepted for publication in MNRAS; pipeline available at https://gitlab.com/iris.b ...
Breda, Iris, van de Ven, Glenn, Thater, Sabine, Mauro, Federica, Amarantidis, Stergios, Falcón-Barroso, J., Jethwa, Prashin, Feldmeier-Krause, Anja, Onodera, Masato, Hensler, Gerhard, Sharma, Gauri   +10 more
openaire   +2 more sources

On the Origin of Neutron-capture Elements in r-I and r-II Stars: A Differential-abundance Analysis

The Astrophysical Journal
We present a strictly line-by-line differential analysis of a moderately r -process-enhanced star ( r -I: HD 107752) with respect to a strongly r -process-enhanced star ( r -II: CS 31082-0001) to investigate the possible common origin of their heavy ...
Pallavi Saraf, Thirupathi Sivarani, Timothy C. Beers, Yutaka Hirai, Masaomi Tanaka, Carlos Allende Prieto, Drisya Karinkuzhi   +6 more
doaj   +1 more source

The R-process Alliance: Enrichment of r-process Elements in a Simulated Milky Way–like Galaxy

The Astrophysical Journal
We study the formation of stars with varying amounts of heavy elements synthesized by the rapid neutron-capture process ( r -process) based on our detailed cosmological zoom-in simulation of a Milky Way–like galaxy with an N -body/smoothed particle ...
Yutaka Hirai, Timothy C. Beers, Young Sun Lee, Shinya Wanajo, Ian U. Roederer, Masaomi Tanaka, Masashi Chiba, Takayuki R. Saitoh, Vinicius M. Placco, Terese T. Hansen, Rana Ezzeddine, Anna Frebel, Erika M. Holmbeck, Charli M. Sakari   +13 more
doaj   +1 more source

Ensemble Galactic Archaeology

Session C7 : Ensemble Galactic ...
openaire   +1 more source

A Comprehensive Study of Open Cluster Chemical Homogeneity Using APOGEE and Milky Way Mapper Abundances

The Astrophysical Journal
Stars in an open cluster are assumed to have formed from a broadly homogeneous distribution of gas, implying that they should be chemically homogeneous.
Amaya Sinha, Gail Zasowski, Peter Frinchaboy, Katia Cunha, Diogo Souto, Jamie Tayar, Keivan Stassun   +6 more
doaj   +1 more source

Potassium Abundances in Extremely Metal Poor Stars: Implications for Nucleosynthesis in the Final Stages of Massive Star Evolution

The Astrophysical Journal
We present a potassium (K) abundance analysis in extremely metal-poor (EMP) stars based on high-resolution ( R  ∼ 60,000) spectra obtained with the High Dispersion Spectrograph on the Subaru Telescope, covering the K i resonance lines at 766 and 769 nm ...
Miho N. Ishigaki, Nozomu Tominaga, Wako Aoki, Shinya Wanajo, Tomoya Takiwaki, Ko Nakamura, Nobuyuki Iwamoto, Ken’ichi Nomoto, Chiaki Kobayashi   +8 more
doaj   +1 more source

Causal Discovery of Latent Variables in Galactic Archaeology

Accepted to ML4Astro 2025 (Machine Learning for Astrophysics workshop at ICML 2025)
Jin, Zehao, Lu, Yuxi, Ting, Yuan-Sen, Zheng, Yujia, Buck, Tobias   +4 more
openaire   +2 more sources

UNIONS: The Ultraviolet Near-infrared Optical Northern Survey

The Astronomical Journal
The Ultraviolet Near-Infrared Optical Northern Survey (UNIONS) is a “collaboration of collaborations” that is using the Canada–France–Hawai’i Telescope, the Pan-STARRS telescopes, and the Subaru Observatory to obtain ugriz images of a core survey region ...
Stephen Gwyn, Alan W. McConnachie, Jean-Charles Cuillandre, Kenneth C. Chambers, Eugene A. Magnier, Thomas de Boer, Michael J. Hudson, Masamune Oguri, Hisanori Furusawa, Hendrik Hildebrandt, Raymond Carlberg, Sara L. Ellison, Junko Furusawa, Raphaël Gavazzi, Rodrigo Ibata, Yannick Mellier, Ken Osato, H. Aussel, Lucie Baumont, Manuel Bayer, Olivier Boulade, Patrick Côté, David Chemaly, Cail Daley, Pierre-Alain Duc, Florence Durret, A. Ellien, Sébastien Fabbro, Leonardo Ferreira, Itsna K. Fitriana, Emeric Le Floc’h, Yoshinobu Fudamoto, Hua Gao, L. W. K. Goh, Tomotsugu Goto, Sacha Guerrini, Axel Guinot, Vincent Hénault-Brunet, Francois Hammer, Yuichi Harikane, Kohei Hayashi, Nick Heesters, Kohei Ichikawa, Martin Kilbinger, P. B. Kuzma, Qinxun Li, Tobías I. Liaudat, Chien-Cheng Lin, Oliver Müller, Nicolas F. Martin, Yoshiki Matsuoka, Gustavo E. Medina, Hironao Miyatake, Satoshi Miyazaki, Charlie T. Mpetha, Tohru Nagao, Julio F. Navarro, Masafumi Niwano, Itsuki Ogami, Nobuhiro Okabe, Masafusa Onoue, Gregory S. H. Paek, Laura C. Parker, David R. Patton, Fabian Hervas Peters, Simon Prunet, Rubén Sánchez-Janssen, M. Schultheis, Federico Sestito, Simon E. T. Smith, J.-L. Starck, Else Starkenburg, Connor Stone, Christopher Storfer, Yoshihisa Suzuki, T. Erben, Salvatore Taibi, G. F. Thomas, Yoshiki Toba, Hisakazu Uchiyama, David Valls-Gabaud, Kim A. Venn, Ludovic Van Waerbeke, Richard J. Wainscoat, Scott Wilkinson, Anna Wittje, Taketo Yoshida, TianFang Zhang, Yuxing Zhong   +88 more
doaj   +1 more source

Chemical Abundances in the Nuclear Star Cluster of the Milky Way: Alpha-element Trends and Their Similarities with the Inner Bulge

The Astrophysical Journal
Chemical characterization of the Galactic center is essential for understanding its formation and structural evolution. Trends of alpha ( α ) elements, such as magnesium, silicon, and calcium, serve as powerful diagnostic tools, offering insights into ...
Nils Ryde, Govind Nandakumar, Mathias Schultheis, Georges Kordopatis, Paola di Matteo, Misha Haywood, Rainer Schödel, Francisco Nogueras-Lara, R. Michael Rich, Brian Thorsbro, Gregory N. Mace, Oscar Agertz, Anish M. Amarsi, Jessica Kocher, Marta Molero, Livia Orglia, Giulia Pagnini, Emanuele Spitoni   +17 more
doaj   +1 more source