Results 61 to 70 of about 92,502 (190)

Candidate Members of the VMP/EMP Disk System of the Galaxy from the SkyMapper and SAGES Surveys

The Astrophysical Journal Supplement Series
Photometric stellar surveys now cover a large fraction of the sky, probe to fainter magnitudes than large-scale spectroscopic surveys, and are relatively free from the target selection biases often associated with such studies.
Jihye Hong, Timothy C. Beers, Young Sun Lee, Yang Huang, Yutaka Hirai, Jonathan Cabrera Garcia, Derek Shank, Shuai Xu, Haibo Yuan, Mohammad K. Mardini, Thomas Catapano, Gang Zhao, Zhou Fan, Jie Zheng, Wei Wang, Kefeng Tan, Jingkun Zhao, Chun Li   +17 more
doaj   +1 more source

The metallicity distribution of the halo and the satellites of the Milky way in the hierarchical merging paradigm [PDF]

, 2008
To account for the observed differential metallicity distribution (DMD) of the Milky Way halo, a semi-analytical model is presented in the framework of the hierarchical merging paradigm for structure formation.
Bekki, Belokurov, Boissier, Boissier, Carney, Cayrel, Cowie, Dekel, Diemand, Edmunds, Eggen, Font, Fukugita, Fulbright, Gilmore, Giocoli, Goswami, Hartwick, Haywood, Helmi, Hill, Holmberg, Kroupa, Kroupa, N. Prantzos, Oey, Prantzos, Prantzos, Ryan, Salvadori, Scanapieco, Schneider, Shetrone, Thomas, Tumlinson, van den Bosch, Venn   +36 more
core   +2 more sources

Are galactic coronae thermally unstable?

, 2010
A substantial fraction of the baryons of disk galaxies like the Milky Way is expected to reside in coronae of gas at the virial temperature. This is the only realistic reservoir of gas available to feed star formation in the disks.
Nipoti, Carlo
core   +1 more source

Additional Evidence for the Existence of a Primordial Disk System

The Astrophysical Journal
The origin of very metal-poor (VMP; [Fe/H] ≤ −2.0) stars on planar orbits has been the subject of great attention since their first discovery. However, prior to the release of the Gaia BP/RP (XP) spectra and large photometric samples such as SkyMapper ...
Shuai Xu, Haibo Yuan, Bowen Huang, Timothy C. Beers, Yang Huang, Maosheng Xiang, Kai Xiao, Jihye Hong, Young Sun Lee, Wuming Yang   +9 more
doaj   +1 more source

The Observed and Predicted Spatial Distribution of Milky Way Satellite Galaxies [PDF]

, 2004
We review evidence that the census of Milky Way satellites similar to those known may be incomplete at low latitude due to obscuration and in the outer halo due to a decreasing sensitivity to dwarf satellites with distance.
Armandroff, B. Willman, Bellazzini, Benson, Bullock, Bullock, Cannon, Chiu, Crane, D. Reed, De Lucia, Dekel, Diemand, Dijkstra, Dinescu, Efstathiou, Eke, F. Governato, Font, Fusi Pecci, Governato, Governato, Grebel, Hayashi, Holmberg, Ibata, Ibata, Irwin, J. J. Dalcanton, Karachentsev, Katz, Kauffmann, Kazantzidis, Kleyna, Klypin, Klypin, Knebe, Kravtsov, Lee, Lynden-Bell, Majewski, Majewski, Martin, Mateo, Mayer, Moore, Newberg, Palma, Peñarrubia, Quinn, Reed, Rocha-Pinto, Rosati, Spergel, Stanek, Stoehr, Stoehr, Susa, T. Quinn, Taylor, Thoul, van den Bergh, Willman, Wilson, Yanny, Zaritsky, Zaritsky, Zehavi   +67 more
core   +2 more sources

Icarus Revisited: An Ancient, Metal-poor Accreted Stellar Stream in the Disk of the Milky Way

The Astrophysical Journal
The search for accreted satellites in the Galactic disk is a challenging task, to which Gaia plays a crucial role in synergy with ground-based spectroscopic surveys. In 2021, P. Re Fiorentin et al.
Paola Re Fiorentin, Alessandro Spagna, Mario G. Lattanzi, Michele Cignoni, Sara Vitali   +4 more
doaj   +1 more source

A 3D Chemodynamical Census of Inner-Galaxy Metal-poor Giants to [Fe/H] ∼ −3.5

The Astrophysical Journal Letters
The earliest assembly of the Milky Way remains poorly understood, yet the spatial, chemical, and kinematic properties of its most metal-poor stars provide a unique fossil record of its proto-Galaxy phase.
Shenglan Sun, Yang Huang, Fangzhou Jiang, Huawei Zhang, Xiang-Xiang Xue, Timothy C. Beers, Chengye Cao, Qikang Feng, Ruizhi Zhang, Haiyang Xing, João A. S. Amarante   +10 more
doaj   +1 more source

When the Milky Way turned off the lights: APOGEE provides evidence of star formation quenching in our Galaxy

, 2016
Quenching, the cessation of star formation, is one of the most significant events in the life cycle of galaxies. We show here the first evidence that the Milky Way experienced a generalised quenching of its star formation at the end of its thick disk ...
Di Matteo, P., Gomez, A., Haywood, M., Katz, D., Lehnert, M. D., Schultheis, M., Snaith, O.   +6 more
core   +3 more sources

The importance of preventive feedback: inference from observations of the stellar masses and metallicities of Milky Way dwarf galaxies [PDF]

, 2017
Dwarf galaxies are known to have remarkably low star formation efficiency due to strong feedback. Adopting the dwarf galaxies of the Milky Way as a laboratory, we explore a flexible semi-analytic galaxy formation model to understand how the feedback ...
Benson, Andrew, Boylan-Kolchin, Michael, Lu, Yu, Mao, Yao-Yuan, Peter, Annika H. G., Tonnesen, Stephanie, Wechsler, Risa, Wetzel, Andrew   +7 more
core   +2 more sources

HR-GO. II. Chemical Abundances of Low-E Retrograde Dynamically Tagged Groups: Revealing Thamnos as a Very Metal-poor Substructure

The Astrophysical Journal
Milky Way halo substructures identified in dynamical space are known to suffer from contamination from the Milky Way in situ stars, which makes their accreted origins uncertain. We present detailed chemical abundances of 35 stars belonging to two sets of
Renjing Xie, Zhen Yuan, Haining Li, Tadafumi Matsuno, Nicolas F. Martin, Ruizhi Zhang, Zhiqiang Yan, Federico Sestito, Guillaume F. Thomas, Projjwal Banerjee, Ruizheng Jiang, Linda Lombardo, David S. Aguado, Kohei Hattori, Gang Zhao   +14 more
doaj   +1 more source