Results 121 to 130 of about 11,917 (213)

Subaru Telescope -History, active/adaptive optics, instruments, and scientific achievements. [PDF]

Proc Jpn Acad Ser B Phys Biol Sci, 2021
Iye M.
europepmc   +1 more source

The Apache Point Observatory Extra-galactic Evolution Experiment (APOeGEE): Chemical Abundance Trends for Seven Dwarf Spheroidal Galaxies in the APOGEE Survey

The Astrophysical Journal
In addition to comprehensive surveys of the Milky Way (MW) bulge, disk, and halo, the Apache Point Galactic Evolution Experiment (APOGEE) project observed seven dwarf spheroidal satellites (dSphs) of the MW: Carina, Sextans, Sculptor, Draco, Ursa Minor ...
Matthew Shetrone, Rachael L. Beaton, Christian R. Hayes, Sten Hasselquist, Joshua D. Simon, Jon A. Holtzman, Katia Cunha, Steven R. Majewski, Jennifer Sobeck, Ricardo Schiavon, Thomas Masseron, Verne V. Smith, David L. Nidever   +12 more
doaj   +1 more source

On the stellar content of the Carina dwarf spheroidal galaxy

, 2010
Accepted on PASP, 12 pages, 6 ...
Bono, Guillaume, Stetson, P.B., Walker, A.R., Monelli, M., Fabrizio, M., Pietrinferni, A., Brocato, E., Buonanno, R., Caputo, F., Cassisi, S., Castellani, M., Cignoni, M., Corsi, C.E., Dall'Ora, M., Degl'Innocenti, S., François, P., Ferraro, I., Iannicola, G., Nonino, M., Moroni, P.G.P., Pulone, L., Smith, H.A., Thévenin, F.   +22 more
openaire   +6 more sources

Disentangling γ − β: The Fourth-order Velocity Moments Based on Spherical Jeans Analysis

The Astrophysical Journal
Distinguishing a core and a cusp within dark matter halos is complexified by the existence of mass-anisotropy degeneracy, where various combinations of velocity anisotropy ( β ) and inner density slope ( γ ) yield similar observational signatures.
Dafa Wardana, Masashi Chiba, Kohei Hayashi   +2 more
doaj   +1 more source

Dark matter interpretation of the Fermi-LAT observations toward the outer halo of M31. [PDF]

Phys Rev D, 2021
Karwin CM, Murgia S, Moskalenko IV, Fillingham SP, Burns AK, Fieg M.   +5 more
europepmc   +1 more source

The Proper Motion of Draco II with HST Using Multiple Reference Frames and Methodologies

The Astrophysical Journal
We present proper motion (PM) measurements for Draco II, an ultrafaint dwarf satellite of the Milky Way. These PMs are measured using two epochs of Hubble Space Telescope (HST)/Advanced Camera for Surveys imaging separated by a 7 yr temporal baseline ...
Jack T. Warfield, Kevin A. McKinnon, Sangmo Tony Sohn, Nitya Kallivayalil, Alessandro Savino, Roeland P. van der Marel, Andrew B. Pace, Christopher T. Garling, Niusha Ahvazi, Paul Bennet, Roger E. Cohen, Matteo Correnti, Mark A. Fardal, Kristen. B. W. McQuinn, Max J. B. Newman, Eduardo Vitral   +15 more
doaj   +1 more source

Exploring direct detection suppressed regions in a simple 2-scalar mediator model of scalar dark matter. [PDF]

Eur Phys J C Part Fields, 2021
Claude J, Godfrey S.
europepmc   +1 more source

Tracing satellite planes in the Sculptor group

Astronomy & Astrophysics
Context. Although substantial progress has been made in reconciling lambda cold dark matter (ΛCDM) simulations with the observed abundance and distribution of satellite galaxies, important tensions persist.
Martínez-Delgado David, Stein Michael, Pawlowski Marcel S., Sakowska Joanna D., Makarov Dmitry, Makarova Lidia, Donatiello Giuseppe, Lang Dustin   +7 more
doaj   +1 more source

The Dark Matter Content of Milky Way Dwarf Spheroidal Galaxies: Draco, Sextans, and Ursa Minor

The Astrophysical Journal
The Milky Way Survey of the Dark Energy Spectroscopic Instrument (DESI) has so far observed three classical dwarf spheroidal galaxies (dSphs): Draco, Sextans, and Ursa Minor.
Hao Yang, Wenting Wang, Ling Zhu, Ting S. Li, Sergey E. Koposov, Jiaxin Han, Songting Li, Rui Shi, Monica Valluri, Alexander H. Riley, Arjun Dey, Constance Rockosi, Carles G. Palau, Jessica Nicole Aguilar, Steven Ahlen, David Brooks, Todd Claybaugh, Andrew Cooper, Axel de la Macorra, Peter Doel, Simone Ferraro, Jaime E. Forero-Romero, Enrique Gaztañaga, Satya Gontcho A Gontcho, Alma Xochitl Gonzalez Morales, Gaston Gutierrez, Julien Guy, Klaus Honscheid, Mustapha Ishak, Dick Joyce, Robert Kehoe, Theodore Kisner, Namitha Kizhuprakkat, Anthony Kremin, Ofer Lahav, Martin Landriau, Laurent Le Guillou, Gustavo E. Medina, Aaron Meisner, Ramon Miquel, Nathalie Palanque-Delabrouille, Francisco Prada, Ignasi Pérez-Ràfols, Graziano Rossi, Eusebio Sanchez, David Schlegel, Michael Schubnell, Joseph Harry Silber, David Sprayberry, Gregory Tarlé, Benjamin Alan Weaver, Rongpu Zhou, Hu Zou   +52 more
doaj   +1 more source

Are Local Group Dwarf Spheroidal Galaxies the First Safe Planet-hosting Environments?

The Astrophysical Journal
We explore whether Local Group dwarf spheroidal (dSph) galaxies might have hosted Earth-like planets dwelling unexposed for several billions of years to major galactic threats to life, such as supernovae and gamma-ray bursts.
Stefano Ciabattini, Stefania Salvadori, Leonardo Testi   +2 more
doaj   +1 more source