Results 101 to 110 of about 5,324 (165)

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

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

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

STRÖMGREN SURVEY FOR ASTEROSEISMOLOGY AND GALACTIC ARCHAEOLOGY: LET THE SAGA BEGIN [PDF]

, 2014
L. Casagrande, V. Silva Aguirre, Dennis Stello, Daniel Huber, Aldo Serenelli, S. Cassisi, Aaron Dotter, A. P. Milone, S. T. Hodgkin, A. F. Marino, Mikkel N. Lund, A. Pietrinferni, M. Asplund, S. Feltzing, Chris Flynn, F. Grundahl, P. E. Nissen, Ralph Schönrich, Katharine J. Schlesinger, Wei Wang   +19 more
openalex   +1 more source

Watching Our Galaxy Grow Up: The Mass and Color Evolution of the Milky Way

The Astrophysical Journal
Using our rich observations within the Milky Way to better understand galaxy evolution requires understanding what the Milky Way looks like “as a galaxy”—that is, its “true” shape and abundance profiles (unskewed by observational biases), signatures of ...
Gail Zasowski, Julie Imig, Hayley Coluccio   +2 more
doaj   +1 more source

Chemical Evolution of the Carina Dwarf Spheroidal

, 2012
We explore a range of chemical evolution models for the Local Group dwarf spheroidal (dSph) galaxy, Carina. A novel aspect of our work is the removal of the star formation history (SFH) as a `free parameter' in the modeling, making use, instead, of its ...
Gibson, B. K., Pilkington, K.
core  

MEASNet. I. A Model for Barium Star Identification and s-process Abundance Estimation from LAMOST DR10 Low-resolution Survey

The Astrophysical Journal
Barium stars are peculiar stars with enhanced slow neutron capture process ( s -process) elements. Abundance analysis of them aids in better understanding the chemical evolution of the Milky Way. In this paper, we introduce a data-driven method named the
Shengjun Song, Xiaoming Kong, Yude Bu, Zhenping Yi, Meng Liu   +4 more
doaj   +1 more source

Galactic archaeology of a thick disc: Excavating ESO 533-4 with VIMOS [PDF]

, 2015
S. Comerón, H. Salo, Joachim Janz, E. Laurikainen, Peter Yoachim   +4 more
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Stellar archaeology with Gaia: the Galactic white dwarf population

, 2015
Gaia will identify several 1e5 white dwarfs, most of which will be in the solar neighborhood at distances of a few hundred parsecs. Ground-based optical follow-up spectroscopy of this sample of stellar remnants is essential to unlock the enormous ...
Barcells, M., Barstow, M., Bono, G., Burleigh, M., Casewell, S., Dhillon, V., Farihi, J., Garcia-Berro, E., Geier, S., Gentile-Fusillo, N., Gänsicke, B., Hermes, J., Hollands, M., Istrate, A., Knigge, C., Manser, C., Marsh, T., Nelemans, G.A., Pala, A., Raddi, R., Skillen, I., Tauris, T., Toloza, O., Trager, S., Tremblay, P., Veras, D., Werner, K.   +26 more
core  

Galactic ArchaeoLogIcaL ExcavatiOns (GALILEO)

, 2023
Mario Ortigoza-Urdaneta, K. Vieira, José G. Fernández-Trincado, A. B. A. Queiroz, B. Barbuy, Timothy C. Beers, C. Chiappini, F. Anders, D. Minniti, Baitian Tang   +9 more
openalex   +1 more source