scholarly journals MUSE observations of the blue compact dwarf galaxy Haro 14. Data analysis and first results on morphology and stellar populations

2021 ◽  
Author(s):  
L. M. Cairos ◽  
J. N. Gonzalez-Perez ◽  
P. M. Weilbacher ◽  
R. Manso Sainz
Keyword(s):  
Data Analysis ◽  
Dwarf Galaxy ◽  
Stellar Populations ◽  
First Results ◽  
Blue Compact Dwarf Galaxy

scholarly journals The Radio Continuum of the Metal‐deficient Blue Compact Dwarf Galaxy SBS 0335−052

2004 ◽  
Vol 606 (2) ◽  
pp. 853-861 ◽  
Author(s):  
Leslie K. Hunt ◽  
Kristy K. Dyer ◽  
Trinh X. Thuan ◽  
James S. Ulvestad
Keyword(s):  
Dwarf Galaxy ◽  
Radio Continuum ◽  
Blue Compact Dwarf Galaxy

scholarly journals Variable Stars in the Fornax Dwarf Galaxy

2000 ◽  
Vol 176 ◽  
pp. 273-273
Author(s):  
D. Bersier ◽  
Peter R. Wood
Keyword(s):  
Dwarf Galaxy ◽  
Variable Stars ◽  
First Results

AbstractWe present the first results of a search for variable stars in the Fornax dwarf galaxy.

scholarly journals Dust in the Extremely Metal‐Poor Blue Compact Dwarf Galaxy I Zw 18: TheSpitzerMid‐infrared View

2007 ◽  
Vol 662 (2) ◽  
pp. 952-958 ◽  
Author(s):  
Yanling Wu ◽  
V. Charmandaris ◽  
L. K. Hunt ◽  
J. Bernard‐Salas ◽  
B. R. Brandl ◽  
...  
Keyword(s):  
Dwarf Galaxy ◽  
Blue Compact Dwarf Galaxy

THE ALICE EXPERIMENT AT CERN LHC: STATUS AND FIRST RESULTS

2011 ◽  
Vol 26 (03n04) ◽  
pp. 517-522
Author(s):  
◽  
ERMANNO VERCELLIN
Keyword(s):  
Data Analysis ◽  
Cosmic Rays ◽  
Dense Matter ◽  
Heavy Ion ◽  
Short Description ◽  
Alice Experiment ◽  
Ion Collisions ◽  
Physics Program ◽  
Accelerate Proton ◽  
First Results

The ALICE experiment is aimed at studying the properties of the hot and dense matter produced in heavy-ion collisions at LHC energies. In the first years of LHC operation the ALICE physics program will be focused on Pb - Pb and p - p collisions. The latter, on top of their intrinsic interest, will provide the necessary baseline for heavy-ion data. After its installation and a long commissioning with cosmic rays, in late fall 2009 ALICE participated (very successfully) in the first LHC run, by collecting data in p - p collisions at c.m. energy 900 GeV. After a short stop during winter, LHC operations have been resumed; the machine is now able to accelerate proton beams up to 3.5 TeV and ALICE has undertaken the data taking campaign at 7 TeV c.m. energy. After an overview of the ALICE physics goals and a short description of the detector layout, the ALICE performance in p - p collisions will be presented. The main physics results achieved so far will be highlighted as well as the main aspects of the ongoing data analysis.

scholarly journals Discovery of the high-ionization emission line [Ne V] λ3426 in the blue compact dwarf galaxy Tol 1214–277

2004 ◽  
Vol 415 (2) ◽  
pp. L27-L30 ◽  
Author(s):  
Y. I. Izotov ◽  
K. G. Noeske ◽  
N. G. Guseva ◽  
P. Papaderos ◽  
T. X. Thuan ◽  
...  
Keyword(s):  
Emission Line ◽  
Dwarf Galaxy ◽  
High Ionization ◽  
Blue Compact Dwarf Galaxy

The first results of PandaX-4T

2022 ◽  
Author(s):  
Jianglai Liu
Keyword(s):  
Dark Matter ◽  
Data Analysis ◽  
Liquid Xenon ◽  
Observable Universe ◽  
Fundamental Particle ◽  
Search Results ◽  
Visible Matter ◽  
First Results ◽  
New Type ◽  
Deep Underground

Dark matter, an invisible substance which constitutes 85% of the matter in the observable universe, is one of the greatest puzzles in physics and astronomy today. Dark matter can be made of a new type of fundamental particle, not yet observed due to its feeble interactions with visible matter. In this talk, we present the first results of PandaX-4T, a 4-ton-scale liquid xenon dark matter observatory, searching for these dark matter particles from deep underground. We will briefly summarize the performance of PandaX-4T, introduces details in the data analysis, and present the latest search results on dark matter-nucleon interactions.

scholarly journals Determination of the OB Stellar Population of IZw18 on the Basis of its Hγ and Hδ Absorption lines

1999 ◽  
Vol 194 ◽  
pp. 444-447
Author(s):  
A. Sinanyan ◽  
D. Kunth ◽  
J. Lequeux ◽  
G. Comte ◽  
A. Petrosian
Keyword(s):  
Spectral Range ◽  
Stellar Population ◽  
Dwarf Galaxy ◽  
Absorption Lines ◽  
Spectroscopic Observations ◽  
Narrow Spectral Range ◽  
Blue Compact Dwarf Galaxy

On the basis of new spectroscopic observations of the blue compact dwarf galaxy IZw18 in the narrow spectral range between 4000Å and 4500Å absorption components of Hγ and Hδ lines were discovered. Equivalent widths of Hγ and Hδ lines have been measured. From available data the OB population of IZw18 was analyzed.

scholarly journals The Dark Blue Compact Dwarf Galaxy NGC 2915

1997 ◽  
Vol 14 (1) ◽  
pp. 77-80 ◽  
Author(s):  
Gerhardt R. Meurer
Keyword(s):  
Dark Matter ◽  
Mass Distribution ◽  
Dwarf Galaxy ◽  
Dark Matter Halo ◽  
High Mass ◽  
Mass Star ◽  
Normal Galaxies ◽  
The Galaxy ◽  
Dark Blue ◽  
Blue Compact Dwarf Galaxy

AbstractRecent results on NGC 2915, the first blue compact dwarf galaxy to have its mass distribution modelled, are summarised. NGC 2915 is shown to have HI well beyond its detected optical extent. Its rotation curve is well determined and fit with maximum disk mass models. The dark matter halo dominates the mass distribution at nearly all radii, and has a very dense core compared to those of normal galaxies. High-mass star formation energises the HI in the centre of the galaxy, but appears to be maintained in viriai equilibrium with the dark matter halo. The implications of these results are briefly discussed.

scholarly journals Recovering the Star Formation History of IC1613 Dwarf Galaxy Using Evolved Stars

2018 ◽  
Vol 14 (S344) ◽  
pp. 77-80
Author(s):  
Seyed Azim Hashemi ◽  
Atefeh Javadi ◽  
Jacco Th. van Loon
Keyword(s):  
Star Formation ◽  
Dwarf Galaxy ◽  
Stellar Populations ◽  
Asymptotic Giant Branch ◽  
Star Formation History ◽  
Evolved Stars ◽  
Formation History ◽  
The Galaxy ◽  
Red Supergiants ◽  
Period Variable

AbstractDetermining the star formation history (SFH) is key to understand the formation and evolution of dwarf galaxies. Recovering the SFH in resolved galaxies is mostly based on deep colour–magnitude diagrams (CMDs), which trace the signatures of multiple evolutionary stages of their stellar populations. In distant and unresolved galaxies, the integrated light of the galaxy can be decomposed, albeit made difficult by an age–metallicity degeneracy. Another solution to determine the SFH of resolved galaxies is based on evolved stars; these luminous stars are the most accessible tracers of the underlying stellar populations and can trace the entire SFH. Here we present a novel method based on long period variable (LPV) evolved asymptotic giant branch (AGB) stars and red supergiants (RSGs). We applied this method to reconstruct the SFH for IC1613, an irregular dwarf galaxy at a distance of 750 kpc. Our results provide an independent confirmation that no major episode of star formation occurred in IC1613 over the past 5 Gyr.

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