scholarly journals On the Origin of the Clustered Quasi-stellar Object Metal Absorption Lines

1995 ◽  
Vol 449 ◽  
pp. 140 ◽  
Author(s):  
Xiangdong Shi
Keyword(s):  
Stellar Object ◽  
Absorption Lines ◽  
Metal Absorption

Absorption Lines in the Spectra of the QSO PKS 1448-232

1984 ◽  
Vol 5 (3) ◽  
pp. 355-359 ◽  
Author(s):  
Chen Jian-sheng ◽  
Donald C. Morton ◽  
Bruce A. Peterson ◽  
Alan E. Wright ◽  
David L. Jauncey
Keyword(s):  
Radio Source ◽  
Stellar Object ◽  
Absorption Lines ◽  
Ultraviolet Excess ◽  
Low Resolution ◽  
Optical Position

Savage et al. (1977) found that the radio source PKS 1448-232 coincided with a stellar object of about magnitude 16.4 having an ultraviolet excess. A low resolution spectrum obtained with the Anglo-Australian Telescope (AAT) confirmed this object as a QSO with zem = 2.22 and revealed many absorption lines short-ward of the La emission. Consequently this object was included in a programme of spectroscopy at intermediate resolution with the AAT to investigate QSO absorption lines. Savage et al. have given a finding chart with an optical position of 14h48m09s.3, −23°17′10″ (1950.0). The radio fluxes are 0.40 Jy at 2.7 GHz and 0.31 Jy at 5.0 GHz.

Identification of Metal Absorption Lines on Quasar Spectra of SDSS DR9

2014 ◽  
Vol 35 (3) ◽  
pp. 529-531
Author(s):  
Cai-Juan Pan ◽  
Cheng-Yu Su ◽  
Mu-Sheng Li ◽  
Wei-Rong Huang
Keyword(s):  
Absorption Lines ◽  
Quasar Spectra ◽  
Metal Absorption

The origin of the quasi-stellar object absorption lines

1991 ◽  
Vol 377 ◽  
pp. 39 ◽  
Author(s):  
S. M. Viegas ◽  
R. B. Gruenwald
Keyword(s):  
Stellar Object ◽  
Absorption Lines

Galactic outflows in star-forming galaxies at z ∼ 6 studied with deep UV spectra and ALMA emission line

2019 ◽  
Vol 15 (S341) ◽  
pp. 307-308
Author(s):  
Yuma Sugahara ◽  
Masami Ouchi ◽  
Yuichi Harikane ◽  
Nicolas Bouché ◽  
Peter D. Mitchell ◽  
...  
Keyword(s):  
Maximum Velocity ◽  
Uv Spectra ◽  
Emission Lines ◽  
Absorption Lines ◽  
Line Profiles ◽  
Strong Emission ◽  
Star Forming ◽  
Lyman Break Galaxies ◽  
Metal Absorption ◽  
Galactic Outflows

AbstractWe present a velocity of galactic outflows in star-forming galaxies at the highest redshift, z ∼ 6, so far studied with metal absorption lines. Absorption-line studies of galactic outflows need well-determined redshifts, but there are few strong emission lines in the observed-frame optical spectra of galaxies at high redshifts. In this work, we use the systemic redshifts determined by the ALMA [CII]158 μm emission lines. The sample consists of seven Lyman break galaxies at 5.1 < z < 5.7 whose Keck/DEIMOS and ALMA data are available in the archive. The outflow maximum velocity (νmax) is estimated by a fitting of line profiles to metal absorption lines in a composite spectrum. We find that νmax monotonically increases from z ∼ 0 to 6 and that νmax tightly correlates with the halo circular velocity estimated from the stellar mass.

scholarly journals Are cold flows detectable with metal absorption lines?

2011 ◽  
Vol 413 (1) ◽  
pp. L51-L55 ◽  
Author(s):  
Taysun Kimm ◽  
Adrianne Slyz ◽  
Julien Devriendt ◽  
Christophe Pichon
Keyword(s):  
Absorption Lines ◽  
Metal Absorption

Hydrogen and metal absorption lines in PKS 0405-123 from the halos of low redshift galaxies

1993 ◽  
Vol 106 ◽  
pp. 1 ◽  
Author(s):  
Hyron Spinrad ◽  
Alexei V. Filippenko ◽  
H. K. Yee ◽  
Erica Ellingson ◽  
J. C. Blades ◽  
...  
Keyword(s):  
Absorption Lines ◽  
Metal Absorption ◽  
Redshift Galaxies

scholarly journals On the Interpretation of QSO Absorption Lines

1988 ◽  
Vol 130 ◽  
pp. 571-571
Author(s):  
V. Müller ◽  
J. P. Mücket ◽  
S. Gottlöber ◽  
H. J. Haubold
Keyword(s):  
High Resolution ◽  
Correlation Analysis ◽  
Temperature Profile ◽  
Absorption Spectra ◽  
Significant Positive Correlation ◽  
Radiation Transport ◽  
Absorption Lines ◽  
Positive Correlation ◽  
Metal Absorption ◽  
Inhomogeneous Temperature

OSO absorption spectra may offer a clue to the distribution of intervening matter clouds at z = 0 … 3. We tackle 1) the question of the occurrence of metal absorption lines of different ionisation levels in the same redshift systems by investigating the radiation transport through an inhomogeneous temperature profile; 2) the clustering properties of the lines of the Lyα forest by a correlation analysis of 9 published high-resolution QSO-spectra with the result of a certain contribution of metal absorption lines as well as marginally significant positive correlation regions ξ ≈ 0.3.

scholarly journals Tracing the re-ionization-epoch intergalactic medium with metal absorption lines

2009 ◽  
Vol 396 (2) ◽  
pp. 729-758 ◽  
Author(s):  
Benjamin D. Oppenheimer ◽  
Romeel Davé ◽  
Kristian Finlator
Keyword(s):  
Intergalactic Medium ◽  
Absorption Lines ◽  
Metal Absorption

High‐Resolution Spectra of Intrinsic Absorption Lines in the Quasi‐stellar Object UM 675

1997 ◽  
Vol 478 (1) ◽  
pp. 80-86 ◽  
Author(s):  
Fred Hamann ◽  
Thomas A. Barlow ◽  
Vesa Junkkarinen ◽  
E. M. Burbidge
Keyword(s):  
High Resolution ◽  
Stellar Object ◽  
Absorption Lines ◽  
Intrinsic Absorption

scholarly journals A ghostly damped Ly α system revealed by metal absorption lines

2016 ◽  
Vol 466 (1) ◽  
pp. L58-L62 ◽  
Author(s):  
H. Fathivavsari ◽  
P. Petitjean ◽  
S. Zou ◽  
P. Noterdaeme ◽  
C. Ledoux ◽  
...  
Keyword(s):  
Absorption Lines ◽  
Metal Absorption
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