Results 121 to 130 of about 692 (185)

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

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

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

The GALAH Survey and Galactic Archaeology in the next decade

, 2015
The field of Galactic Archaeology aims to understand the origins and evolution of the stellar populations in the Milky Way, as a way to understand galaxy formation and evolution in general. The GALAH (Galactic Archaeology with HERMES) Survey is an ambitious Australian-led project to explore the Galactic history of star formation, chemical evolution ...
openaire   +2 more sources

Galactic archaeology and its application to the galactic center

, 2018
L'archéologie galactique consiste à disséquer et analyser les nombreuses composantes de la Voie Lactée afin de mettre en évidence et distinguer les processus physiques qui contribuent à sa formation et son évolution.
Nandakumar, Govind
core  

Where are the most ancient stars in the Milky Way? [PDF]

Mon Not R Astron Soc, 2018
El-Badry K, Bland-Hawthorn J, Wetzel A, Quataert E, Weisz DR, Boylan-Kolchin M, Hopkins PF, Faucher-Giguère CA, Kereš D, Garrison-Kimmel S.   +9 more
europepmc   +1 more source

A direct black-hole mass measurement in a little red dot at high redshift. [PDF]

Nature
Juodžbalis I, Marconcini C, D'Eugenio F, Maiolino R, Marconi A, Übler H, Scholtz J, Ji X, Jones GC, Perna M, Arribas S, Bennett JS, Bromm V, Bunker AJ, Carniani S, Charlot S, Cresci G, Dayal P, Egami E, Fabian A, Inayoshi K, Isobe Y, Ivey LR, Koudmani S, Laporte N, Liu B, Lyu J, Mazzolari G, Monty S, Parlanti E, Pérez-González PG, Robertson B, Schneider R, Sijacki D, Tacchella S, Trinca A, Valiante R, Volonteri M, Witstok J, Zhang S.   +39 more
europepmc   +1 more source

Potential impact of the Sagittarius dwarf galaxy on the formation of young O-rich stars. [PDF]

Nat Commun
Sun T, Bi S, Chen X, Chen Y, Lu YL, Liu C, Buck T, Zhang X, Li T, Li Y, Wu Y, Ge Z, Ye L.   +12 more
europepmc   +1 more source