A high-resolution optical and radio study of Milky Way halo gas

1993 ◽  
Vol 88 ◽  
pp. 81 ◽  
Author(s):  
C. E. Albert ◽  
J. C. Blades ◽  
D. C. Morton ◽  
Felix J. Lockman ◽  
M. Proulx ◽  
...  
Keyword(s):  
High Resolution ◽  
Milky Way ◽  
Halo Gas ◽  
Milky Way Halo

scholarly journals High-resolution 21-cm observations of low-column density gas clumps in the Milky Way halo

2009 ◽  
Vol 503 (2) ◽  
pp. 483-493 ◽  
Author(s):  
N. Ben Bekhti ◽  
P. Richter ◽  
B. Winkel ◽  
F. Kenn ◽  
T. Westmeier
Keyword(s):  
High Resolution ◽  
Column Density ◽  
Milky Way ◽  
Milky Way Halo

scholarly journals The Galaxy and its stellar halo - insights from a hybrid cosmological approach

2008 ◽  
Vol 4 (S254) ◽  
pp. 423-428
Author(s):  
Gabriella De Lucia ◽  
Amina Helmi
Keyword(s):  
High Resolution ◽  
Physical Properties ◽  
Milky Way ◽  
Dynamical Friction ◽  
Milky Way Galaxy ◽  
The Galaxy ◽  
Stellar Halo ◽  
Good Agreement ◽  
Milky Way Halo

AbstractWe use a series of high-resolution N-body simulations of a ‘Milky-Way’ halo, coupled to semi-analytic techniques, to study the formation of our own Galaxy and of its stellar halo. Our model Milky Way galaxy is a relatively young system whose physical properties are in quite good agreement with observational determinations. In our model, the stellar halo is mainly formed from a few massive satellites accreted early on during the galaxy's lifetime. The stars in the halo do not exhibit any metallicity gradient, but higher metallicity stars are more centrally concentrated than stars with lower abundances. This is due to the fact that the most massive satellites contributing to the stellar halo are also more metal rich, and dynamical friction drags them closer to the inner regions of the host halo.

Early chemical enrichment of the Milky Way dwarf satellites from high-resolution and NLTE analysis of VMP stars

2018 ◽  
Vol 14 (S344) ◽  
pp. 103-104
Author(s):  
Lyudmila Mashonkina ◽  
Pascale Jablonka ◽  
Tatyana Sitnova ◽  
Yuri Pakhomov ◽  
Pierre North ◽  
...  
Keyword(s):  
High Resolution ◽  
Milky Way ◽  
Chemical Species ◽  
Chemical Enrichment ◽  
Ursa Minor ◽  
R Process ◽  
Milky Way Halo

AbstractWe present the NLTE abundances of 10 chemical species in 65 very metal-poor stars in eight dSphs and the Milky Way halo. The classical dSphs Sculptor, Ursa Minor, Sextans, and Fornax reveal a similar plateau at [α/Fe] = 0.3 for each of Mg, Ca, and Ti, similarly to the MW halo. We provide the evidence for a decline in α/Fe in the Boötes I UFD, that is probably due to the ejecta of SNeIa. The dichotomy in the [Sr/Ba] versus [Ba/H] diagram is observed in the classical dSphs, similarly to the MW halo, calling for two different nucleosynthesis channels for Sr. The Boötes I and UMa II UFDs reveal very similar ratios of [Sr/Mg] = −1.3 and [Ba/Mg] = –1. The stars in the Coma Berenices and Leo IV UFDs are even poorer in Sr and Ba. The subsolar Sr/Ba ratios of Boötes I and UMa II indicate a common r-process origin of their n-capture elements.

scholarly journals Optical and Ultraviolet Absorption Studies of Cool Gas in the Milky Way Halo

1991 ◽  
Vol 144 ◽  
pp. 53-66
Author(s):  
L. Danly
Keyword(s):  
Interstellar Medium ◽  
Milky Way ◽  
Ultraviolet Absorption ◽  
Trade Offs ◽  
Absorption Studies ◽  
Cool Gas ◽  
The Many ◽  
Halo Gas ◽  
Milky Way Halo

Of the many and various means for observing the interstellar medium, and halo gas in particular, optical and ultraviolet absorption techniques provide both unique opportunities and unique limitations. As its title indicates, this article speaks specifically to the contributions from absorption methods to our knowledge of halo gas with temperatures below 105 K. A brief description of the trade-offs and benefits of the methods is therefore useful to set the stage for interpreting the observations of halo gas.

Ultraviolet and radio observations of Milky Way halo gas

1992 ◽  
Vol 81 ◽  
pp. 125 ◽  
Author(s):  
Laura Danly ◽  
Felix J. Lockman ◽  
Marilyn R. Meade ◽  
Blair D. Savage
Keyword(s):  
Milky Way ◽  
Radio Observations ◽  
Halo Gas ◽  
Milky Way Halo

scholarly journals FOLLOWING THE COSMIC EVOLUTION OF PRISTINE GAS. I. IMPLICATIONS FOR MILKY WAY HALO STARS

2016 ◽  
Vol 834 (1) ◽  
pp. 23 ◽  
Author(s):  
Richard Sarmento ◽  
Evan Scannapieco ◽  
Liubin Pan
Keyword(s):  
Milky Way ◽  
Halo Stars ◽  
Cosmic Evolution ◽  
Milky Way Halo

Evidence of a Dwarf Galaxy Stream Populating the Inner Milky Way Halo

2021 ◽  
Vol 920 (1) ◽  
pp. 51
Author(s):  
Khyati Malhan ◽  
Zhen Yuan ◽  
Rodrigo A. Ibata ◽  
Anke Arentsen ◽  
Michele Bellazzini ◽  
...  
Keyword(s):  
Milky Way ◽  
Dwarf Galaxy ◽  
Milky Way Halo

scholarly journals Are there MACHOs in the Milky Way halo?

2002 ◽  
Vol 395 (1) ◽  
pp. 31-35 ◽  
Author(s):  
A. M. Green ◽  
K. Jedamzik
Keyword(s):  
Milky Way ◽  
Milky Way Halo

scholarly journals The formation of the Milky Way halo and its dwarf satellites; a NLTE-1D abundance analysis

2017 ◽  
Vol 604 ◽  
pp. A129 ◽  
Author(s):  
L. Mashonkina ◽  
P. Jablonka ◽  
Yu. Pakhomov ◽  
T. Sitnova ◽  
P. North
Keyword(s):  
Milky Way ◽  
Milky Way Halo
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