Results 1 to 10 of about 43,733 (225)

Chemical Inhomogeneities in the Milky Way Stellar Halo [PDF]

The Astronomical Journal, 2008
We have compiled a sample of 699 stars from the recent literature with detailed chemical abundance information (spanning -4.2 < [Fe/H] < +0.3), and we compute their space velocities and Galactic orbital parameters.
Allende Prieto, Argast, Beers, Bonifacio, Bonifacio, Carney, Carretta, Chiba, Chiba, Cohen, Cutri, Dinescu, Dinescu, Dinescu, Dinescu, Dinescu, Dinescu, Edvardsson, Farouqi, Frebel, Fulbright, Fulbright, Fulbright, Geisler, Hanson, Helmi, Ian U. Roederer, Iben, Ivans, Kepley, Kerr, Koch, Korn, Lee, Lee, Lee, McCall, McWilliam, Mihalas, Monet, Morrison, Mottini, Newberg, Nissen, Perryman, Piatek, Piatek, Piatek, Piatek, Preston, Pritzl, Prochaska, Qian, Sadakane, Schörck, Shetrone, Shetrone, Siegel, Sneden, Sommer-Larsen, Stephens, Stephens, Tautvaišiene, Tolstoy, Unavane, Urban, Venn, Yoshii, Zacharias, Zacharias   +69 more
core   +4 more sources

Mapping the Milky Way with LAMOST II: the stellar halo [PDF]

Monthly Notices of the Royal Astronomical Society, 2017
The radial number density and flattening of the Milky Way's stellar halo is measured with $\mathrm{5351}$ metal-poor ([Fe/H]$
Cao, Zihuang, Carlin, Jeffrey L., Deng, Li-Cai, Hou, Yonghui, Li, Jing, Liu, Chao, Newberg, Heidi Jo, Wang, Yuefei, Xia, Qi-Ran, Xu, Yan, Xue, Xiang-Xiang, Zhang, Yong   +11 more
core   +4 more sources

The Kinematic Properties of Milky Way Stellar Halo Populations [PDF]

Monthly Notices of the Royal Astronomical Society, 2021
In the Gaia era stellar kinematics are extensively used to study Galactic halo stellar populations, to search for halo structures, and to characterize the interface between the halo and hot disc populations. We use distribution function-based models of
J. Lane, J. Bovy, J. Mackereth
semanticscholar   +4 more sources

Dynamics of stellar and HI streams in the Milky Way halo [PDF]

EPJ Web of Conferences, 2011
Stellar streams are key players in many aspects of Milky Way studies and, in particular, studying their orbital dynamics is crucial for furthering our understanding of the Milky Way's gravitational potential.
Jin, Shoko
core   +4 more sources

Characterizing the Chemistry of the Milky Way Stellar Halo: Detailed Chemical Analysis of a Metal-Poor Stellar Stream [PDF]

, 2010
We present the results of a detailed abundance analysis of one of the confirmed building blocks of the Milky Way stellar halo, a kinematically-coherent metal-poor stellar stream. We have obtained high resolution and high S/N spectra of 12 probable stream
Aoki, Arlandini, Beers, Bell, Belokurov, Belokurov, Belokurov, Biémont, Biémont, Biémont, Blackwell, Blackwell, Blackwell, Booth, Brown, Carlin, Carney, Carney, Castelli, Chiba, Chou, Chou, Christopher Sneden, Cohen, Cohen, Cohen, Cohen, Da Costa, Demarque, Den Hartog, Den Hartog, Farouqi, Frebel, Frebel, Frebel, Fuhr, Fulbright, Gallino, Geha, George W. Preston, Grevesse, Griffin, Grillmair, Grillmair, Grillmair, Han, Hannaford, Honda, Ian B. Thompson, Ian U. Roederer, Ivans, Ivarsson, Keeping, Kepley, Kirby, Klement, Kratz, Kurucz, Lai, Lawler, Lawler, Lawler, Lawler, Lawler, Lawler, Lawler, Lawler, Lee, Li, Lynden Bell, Majewski, Martinson, Martínez-Delgado, Milone, Morrison, Nahar, Newberg, Newberg, Nitz, Norris, Odenkirchen, Pickering, Pickering, Piotto, Preston, Roederer, Roederer, Roederer, Sadakane, Schatz, Shetrone, Skrutskie, Smith, Sneden, Sneden, Sneden, Sneden, Sobeck, Spite, Starkenburg, Stephen A. Shectman, Takeda, Vivas, Wallerstein, Whaling, Yanny, York, Zhang, Zucker   +108 more
core   +4 more sources

Using frequency maps to constrain the distribution function of the Milky Way stellar halo

EPJ Web of Conferences, 2011
Resolved surveys of the Milky Way's stellar halo can obtain all 6 phase space coordinates of tens of thousands of individual stars, making it possible to compute their 3-dimensional orbits. Spectral analysis of large numbers of halo orbits can be used to
Valluri, Monica
core   +3 more sources

Evidence for two early accretion events that built the Milky Way stellar halo [PDF]

Monthly Notices of the Royal Astronomical Society, 2019
The Gaia Sausage is the major accretion event that built the stellar halo of the Milky Way galaxy. Here, we provide dynamical and chemical evidence for a second substantial accretion episode, distinct from the Gaia Sausage. The Sequoia Event provided the
G. Myeong, E. Vasiliev, G. Iorio, N. Evans, V. B. IoA, Cambridge, L. Institute, Moscow   +7 more
semanticscholar   +4 more sources

Reflex motion in the Milky Way stellar halo resulting from the Large Magellanic Cloud infall [PDF]

Monthly Notices of the Royal Astronomical Society: Letters, 2020
We present the results of N-body models of the Milky Way and Large Magellanic Cloud system and study the kinematic reflex motion in the stellar halo owing to the barycentre displacement of the disc.
M. Petersen, J. Peñarrubia
semanticscholar   +1 more source

An Old, Metal-rich Accreted Stellar Component in the Milky Way Stellar Disk [PDF]

Astrophysical Journal, 2022
We study the possibility that the Milky Ways’ cool stellar disk includes mergers with ancient stars. Galaxies are understood to form in a hierarchical manner, where smaller (proto-)galaxies merge into larger ones.
D. Feuillet, S. Feltzing, C. Sahlholdt, T. Bensby   +3 more
semanticscholar   +1 more source

A Dwarf Galaxy Debris Stream Associated with Palomar 1 and the Anticenter Stream

The Astrophysical Journal Letters, 2023
We report the discovery of a new stream (dubbed as Yangtze) detected in Gaia Data Release 3. The stream is at a heliocentric distance of ∼9.12 kpc and spans nearly 27° by 1.°9 on the sky.
Yong Yang, Jing-Kun Zhao, Xian-Hao Ye, Gang Zhao, Ke-Feng Tan   +4 more
doaj   +1 more source