The Gaia hybrid catalog: a leverage to find Galactic structures

2014 ◽  
Vol 67-68 ◽  
pp. 371-372
Author(s):  
M. Fouesneau ◽  
C.A.L. Bailer-Jones
Keyword(s):  
Galactic Structures

scholarly journals Multi-wavelength study of star formation properties in barred galaxies

2012 ◽  
Vol 8 (S295) ◽  
pp. 323-323
Author(s):  
Zhi-Min Zhou ◽  
Chen Cao ◽  
Hong Wu
Keyword(s):  
Star Formation ◽  
Formation Rate ◽  
Evolutionary Sequence ◽  
Barred Galaxies ◽  
Secular Evolution ◽  
Density Distributions ◽  
Complex Process ◽  
Multi Wavelength ◽  
Galactic Structures ◽  
Future Work

AbstractStellar bars are important internal drivers of the secular evolution of disk galaxies. Using a sample of nearby barred galaxies with weak and strong bars, we evaluate the correlations between star formation properties in different galactic structures and their associated bars, and try to interpret the complex process of bar-driven secular evolution. We find that weaker bars tend to associate with lower concentrical star formation activities, while stronger bars appear to have large scatter in the distribution of the global star formation activities. In general, the star formation activities in early- and late-type galaxies have different behavior, with similar star formation rate density distributions. In addition, there are only weak trends toward increased star formation activities in bulges and galaxies with stronger bars, which is consistent with previous works. Our results suggest that the different stages of the evolutionary sequence and many factors besides bars may contribute to the complexity of this process. Furthermore, significant correlations are found between the star formation activities in different galactic structures, in which barred galaxies with intense star formation in bulges tend to also have active star formation in their bars and disks. Most bulges have higher star formation densities than their associated bars and disks, indicating the presence of bar-driven evolution. Therefore, we derived a possible criterion (Figure 1) to quantify the different stages of a bar-driven evolutionary sequence. Future work is needed to improve on the uncertainties of this study.

scholarly journals Formation and evolution of sub-galactic structures in a cosmological context

2015 ◽  
Vol 11 (S317) ◽  
pp. 284-285
Author(s):  
Kyungwon Chun ◽  
Jihye Shin ◽  
Sungsoo S. Kim
Keyword(s):  
High Resolution ◽  
Globular Cluster ◽  
Dwarf Galaxy ◽  
Cosmological Context ◽  
Formation And Evolution ◽  
Zoom In ◽  
Galactic Structures ◽  
Trace Formation

AbstractIn this study, we aim to trace formation of the primordial globular cluster, ultra faint dwarf galaxy, and ultra compact dwarf in a cosmological context of a high-resolution hydrodynamic zoom-in simulation. We show that the baryon-dominated systems have experienced more interactions with the mini halos before infalling to the main halo.

scholarly journals Symbiotic stars as tracers of Galactic structures

2013 ◽  
Vol 9 (S298) ◽  
pp. 417-417
Author(s):  
L. Leedjärv
Keyword(s):  
Stellar Populations ◽  
Emission Lines ◽  
Symbiotic Stars ◽  
Peculiar Stars ◽  
The Galaxy ◽  
Galactic Structures ◽  
Test Objects

AbstractThe Gaia mission is expected to provide a total number of symbiotic stars in the Galaxy and their membership in stellar populations. Symbiotic stars with distinct emission lines in their spectra can be used as test objects in the analysis of Gaia data on peculiar stars.

A unified theory for the formation of galactic structures

2004 ◽  
Vol 48 (11) ◽  
pp. 877-899 ◽  
Author(s):  
V. L. Polyachenko ◽  
E. V. Polyachenko
Keyword(s):  
Unified Theory ◽  
Galactic Structures

scholarly journals Galactic Structures from Gravitational Radii

Galaxies ◽  
2018 ◽  
Vol 6 (1) ◽  
pp. 22 ◽  
Author(s):  
Salvatore Capozziello ◽  
Duško Borka ◽  
Vesna Borka Jovanović ◽  
Predrag Jovanović
Keyword(s):  
Galactic Structures

scholarly journals Globular Cluster Systems in Galaxies

1980 ◽  
Vol 85 ◽  
pp. 369-383 ◽  
Author(s):  
René Racine
Keyword(s):  
Globular Cluster ◽  
Cluster Systems ◽  
Galactic Structures ◽  
The Universe

The study of globular cluster systems is very important. Because these systems are so old, their investigation is a form of archeo-astronomy whereby a slow and, at times, tedious gathering of fragmentary data laboriously uncovers the skeleton of early galactic structures. Our theories and our imagination can then try to put some flesh on these bones in attempts to visualize what these early inhabitants of the Universe might have looked like.

On massive-neutrino halos and galactic structures

1981 ◽  
Vol 32 (15) ◽  
pp. 411-414 ◽  
Author(s):  
A. Crollalanza ◽  
Gao Jian Gong ◽  
E. Euffini
Keyword(s):  
Massive Neutrino ◽  
Galactic Structures

scholarly journals Predicting the dark matter velocity distribution in galactic structures: tests against hydrodynamic cosmological simulations

2020 ◽  
Vol 2020 (10) ◽  
pp. 031-031 ◽  
Author(s):  
Thomas Lacroix ◽  
Arturo Núñez-Castiñeyra ◽  
Martin Stref ◽  
Julien Lavalle ◽  
Emmanuel Nezri
Keyword(s):  
Dark Matter ◽  
Velocity Distribution ◽  
Cosmological Simulations ◽  
Galactic Structures

scholarly journals Gamma Emission from Large Galactic Structures

2017 ◽  
Author(s):  
Henrike Fleischhack ◽  
Hugo Ayala Solares ◽  
Petra Huentemeyer ◽  
Matthew Coel ◽  
Keyword(s):  
Gamma Emission ◽  
Galactic Structures
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