scholarly journals The cosmological bias factor of damped Lyman alpha systems: dependence on metal line strength

2018 ◽  
Vol 480 (4) ◽  
pp. 4702-4709 ◽  
Author(s):  
Ignasi Pérez-Ràfols ◽  
Jordi Miralda-Escudé ◽  
Andreu Arinyo-i-Prats ◽  
Andreu Font-Ribera ◽  
Lluís Mas-Ribas
Keyword(s):  
Line Strength ◽  
Metal Line ◽  
Lyman Alpha ◽  
Bias Factor ◽  
Damped Lyman Alpha Systems

scholarly journals A metal-line strength indicator for damped Lyman alpha (DLA) systems at low signal-to-noise

2018 ◽  
Vol 481 (3) ◽  
pp. 3921-3934 ◽  
Author(s):  
Andreu Arinyo-i-Prats ◽  
Lluís Mas-Ribas ◽  
Jordi Miralda-Escudé ◽  
Ignasi Pérez-Ràfols ◽  
Pasquier Noterdaeme
Keyword(s):  
Line Strength ◽  
Signal To Noise ◽  
Metal Line ◽  
Lyman Alpha

Near-Infrared Integral Field Spectroscopy of Damped Lyman- $\alpha$ Systems

2006 ◽  
pp. 330-333
Author(s):  
Andrew Bunker ◽  
Annette Ferguson ◽  
Rachel Johnson ◽  
Richard McMahon ◽  
Ian Parry ◽  
...  
Keyword(s):  
Near Infrared ◽  
Lyman Alpha ◽  
Integral Field Spectroscopy ◽  
Field Spectroscopy ◽  
Damped Lyman Alpha Systems ◽  
Integral Field

A spectroscopic study of damped Lyman-alpha systems in the Las Campanas/Palomar survey

1993 ◽  
Vol 84 ◽  
pp. 1 ◽  
Author(s):  
Limin Lu ◽  
Arthur M. Wolfe ◽  
David A. Turnshek ◽  
Kenneth M. Lanzetta
Keyword(s):  
Spectroscopic Study ◽  
Lyman Alpha ◽  
Damped Lyman Alpha Systems

KINEMATIC PROPERTIES OF DAMPED LYMAN ALPHA SYSTEMS

2006 ◽  
Vol 15 (03) ◽  
pp. 371-386
Author(s):  
SNIGDHA DAS ◽  
PUSHPA KHARE
Keyword(s):  
Statistical Tests ◽  
Random Motion ◽  
Model Parameters ◽  
Galactic Halos ◽  
Dark Matter Halos ◽  
Lyman Alpha ◽  
The Press ◽  
Damped Lyman Alpha Systems ◽  
The Universe ◽  
Kinematic Properties

In a previous paper, we determined the statistical distributions for various classes of QSO absorption systems in the framework of the CDM model of the universe with a mass distribution of dark matter halos as given by the Press Schechter mechanism. These were shown to be consistent with the observed distributions for reasonable choices of model parameters. In this paper, we generate Voigt profiles of C IV lines associated with Damped Lyman Alpha systems in the framework of this model, taking into account rotation of disks and random motion of clouds embedded in galactic halos. We compare these with the profiles for a sample of 32 Damped Lyman Alpha systems collected from the literature by performing several statistical tests. These tests compare the width and the degree of asymmetry in the line profiles produced by the rotation of randomly inclined disks and the random velocity of clouds in the galactic halos, with the corresponding quantities in the observed profiles. We find that the kinematic properties predicted by the model are in good agreement with observations provided the disk thickness is about ten thousand times smaller than its radius, which indicates that the material in the disks is concentrated in dense clouds with roughly unit covering factor.

scholarly journals A correlation between SN II metal line strength and host H ii region oxygen abundance

2015 ◽  
Vol 11 (A29B) ◽  
pp. 272-273
Author(s):  
Joseph P. Anderson ◽  
Claudia P. Gutiérrez ◽  
Luc Dessart
Keyword(s):  
Emission Line ◽  
Line Strength ◽  
Type Ii ◽  
Metal Line ◽  
Oxygen Abundance ◽  
Large Sample ◽  
H Ii Region

AbstractDessart et al., demonstrated that type II supernova (SN II) model spectra present increasing metal line strength with increasing progenitor metallicity. To confront these models with observations, we obtained a large sample of SN II host H ii region emission line spectroscopy. We show that inferred SN II host H ii region metallicities have a statistically significant correlation with the strength of SN II metal lines, specifically Fe ii 5018Å.

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