Last edited by Brazragore
Thursday, July 30, 2020 | History

3 edition of High-resolution spectroscopy of quasars and quasar absorption-line systems found in the catalog.

High-resolution spectroscopy of quasars and quasar absorption-line systems

High-resolution spectroscopy of quasars and quasar absorption-line systems

  • 333 Want to read
  • 1 Currently reading

Published by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, DC, Springfield, Va .
Written in English

    Subjects:
  • Hubble Space Telescope.,
  • High resolution.,
  • Quasars.,
  • Spectroscopy.

  • Edition Notes

    Other titlesHigh resolution spectroscopy of quasars and quasar absorption line systems
    StatementJ. Michael Shull.
    SeriesNASA contractor report -- NASA CR-204626
    ContributionsUnited States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL17122704M

    Dec 14,  · Tables 1– 11 provide the important laboratory data for quasar absorption-line analysis, focusing particularly on the frequencies recommended for constraining cosmological changes in α. The isotopic and hyperfine structures are illustrated in Figs 1–10, where measurements or calculations were available or newly inspirationdayevents.com by: Apr 01,  · Abstract. At redshifts z abs ≲ 2, quasar absorption-line constraints on space–time variations in the fine-structure constant, α, rely on the comparison of Mg ii and Fe ii transition wavelengths. One potentially important uncertainty is the relative abundance of Mg isotopes in the absorbers, which, if different from solar, can cause spurious shifts in the measured wavelengths and Cited by:

    Quasar Continuum Fitting and Silicon Absorption in the Low Redshift Intergalatic Medium by Adam A. Miller Submitted to the Department of Physics on May 12, , in partial fulfillment of the requirements for the degree of Bachelor of Science Abstract We present results on the evolution of Lyae absorption at low redshift, and the first. The most precise method of investigating possible space-time variations of the fine-structure constant, alpha equivalent to (1/hc)(e(2)/4 pi epsilon(0)), using high-redshift quasar absorption lines is the many-multiplet (MM) method. For reliable results this method requires very accurate relative laboratory wavelengths for a number of UV resonance transitions from several different ionic species.

    Research into active galactic nuclei (AGN) – the compact, luminous hearts of many galaxies – is at the forefront of modern astrophysics. Understanding these objects requires extensive knowledge in many different areas: accretion disks, the physics of dust and ionized gas, astronomical spectroscopy, star formation, and the cosmological evolution of galaxies and black inspirationdayevents.com by: The prospect of advancing these studies of quasar variability now faces a bottleneck. The S82 quasars have the advantage of sample size, wavelength coverage, and spectroscopy, but the light curves have poor sampling and modest overall lengths, leading to significant problems for accurately estimating τ .


Share this book
You might also like
Sandwich, the town that glass built.

Sandwich, the town that glass built.

Report of the Organization and Administration Task Force.

Report of the Organization and Administration Task Force.

Sunday Times map of the monuments of South Africa

Sunday Times map of the monuments of South Africa

Palliative and terminal care

Palliative and terminal care

essential plastics industry

essential plastics industry

Oil motion during lead closure

Oil motion during lead closure

interrelationship between investment flows and technology transfer

interrelationship between investment flows and technology transfer

Record of Observations at the Agincourt Magnetic Observatory, 1952-1953-1954.

Record of Observations at the Agincourt Magnetic Observatory, 1952-1953-1954.

Never-married women

Never-married women

Western hemisphere immigration.

Western hemisphere immigration.

CENTURY ELECTRONICS MANUFACTURING, INC.

CENTURY ELECTRONICS MANUFACTURING, INC.

mountain lion in Nevada

mountain lion in Nevada

visitors guide to Ohios state nature preserves

visitors guide to Ohios state nature preserves

Scouting for Washington

Scouting for Washington

Snoopy features as the great entertainer

Snoopy features as the great entertainer

Finnish birds

Finnish birds

High-resolution spectroscopy of quasars and quasar absorption-line systems Download PDF EPUB FB2

High-Resolution Spectroscopy of Quasars and Quasar Absorption-Line Systems % J. MICHAEL SHULL l _-% Joint Institute for Laboratory. Astrophysics, University of Colorado and National Institute for Standards and Technology.

Campus Box.*40, Boulder. Colorado Electronic mail: [email protected] Received March 21; accepted 2. Basis of Quasar Absorption Spectroscopy • The spectra are complex and many of the lines are weak • The observations are done with large 4m telescopes at high resolution, e.g., R=45, for Keck HIRES • The methodology for the analysis of the lines is the same as for ISM absorption lines based on the absorption cross section lu ()= f.

Get this from a library. High-resolution spectroscopy of quasars and quasar absorption-line systems. [J Michael Shull; United States.

National Aeronautics and Space Administration.]. N SO0 O Absorption-Line Spectra of Quasars Ly-oCited by: 1. We present high-resolution optical spectroscopy of several high-redshift BAL (Broad Absorption Line) quasars: +, at redshift z=, which has a known radio counterpart observed by the VLA Author: F.

Jiménez-Luján, J. González-Serrano, C. Benn. THE ADVANTAGE OF INCREASED RESOLUTION IN THE STUDY OF QUASAR ABSORPTION SYSTEMS Anand Narayanan,1 Toru Misawa,1 Jane C. Charlton,1 and Rajib Ganguly2 Received May 11; accepted August 2 absorption-line systems in the spectrum of one of the brightest quasars, PG +, and discuss the implications of our R ¼.

HIGH-RESOLUTION ABSORPTION SPECTROSCOPY OF MULTIPHASE, HIGH-METALLICITY GAS ASSOCIATED WITH THE LUMINOUS QUASAR HE Rajib Ganguly,2,3 Kenneth R. Sembach,2 Todd M. Tripp,4 Blair D.

Savage,5 and Bart P. Wakker5 absorption-line systems that appear to cluster around quasars. Gas High-resolution spectroscopy of quasars and quasar absorption-line systems book galaxies - quasar absorption lines (contd) Longair chap.

17, 18 1 Quasar Spectrum at High Resolution quasar 5 Types of Absorption line systems (quasars & star forming galaxies), counteracting the Hubble expansion. A Census of Intrinsic Narrow Absorption Lines in the Spectra of Quasars at z = We present 23 quasar absorption-line systems selected by the Mg II λλ, doublet with Wr() > Aims.

We have searched for temporal variations of narrow absorption lines in high resolution quasar spectra. A sample of 5 distant sources have been assembled, for which 2 spectra - VLT/UVES or.

High-resolution images of quasars, Broad absorption-line (BAL) quasars are quasars whose spectra exhibit broad absorption lines that are blueshifted relative to the quasar's rest Relativistic beaming of the jet emission results in strong and rapid variability of the quasar brightness.

OVV quasars are also considered to be a type of blazar. High Resolution Spectroscopy of X-ray Quasars: Searching for the X-ray Absorption from the Warm-Hot Intergalactic Medium No real absorption line is detected at above the 3 σ level in all of the spectra.

Taotao, Claude R. Canizares, and Herman L. Marshall. “High‐Resolution Spectroscopy of X‐Ray Quasars: Searching for the X‐Ray Cited by: @article{osti_, title = {Extreme Variability in a Broad Absorption Line Quasar}, author = {Stern, Daniel and Jun, Hyunsung D.

and Graham, Matthew J. and Djorgovski, S. and Donalek, Ciro and Drake, Andrew J. and Mahabal, Ashish A. and Steidel, Charles C. and Arav, Nahum and Chamberlain, Carter and Barth, Aaron J.

and Glikman, Eilat, E Cited by: 6. High resolution radio studies of broad absorption line (BAL) quasars. Kunert-Bajraszewska (TCfA) Black holes, jets and outflows Kathmandu, Oct are seen in 15% of both the radio-quiet and radio-loud quasar populations (Knigge+,; Dai+,).

Study the central parts of the radio-loud BAL quasars to test the evolution. The absorption lines observed in quasar spectra have given us a detailed picture of the in-tergalactic medium and the metal abundance and kinematics of high redshift galaxies.

In this review, we present an introduction to the field, starting with the techniques used for interpreting absorption line spectra. Modelling quasar absorption line spectra The CASt dataset inspirationdayevents.com Astronomical background. Quasars, the most luminous continuously emitting objects in the Universe, arise from the accretion (infall) of gas onto supermassive black holes in the center of galaxies.

Abstract. In this paper we present an analysis of absorption-line variability in mini-BAL quasar LBQS + The Sloan Digital Sky Survey spectrum demonstrates that the absorption troughs can be divided into two components of blueshift velocities of ∼ and ∼ km.

The Quasar Absorption Line - Galaxy Evolution Group A GENERAL INTRODUCTION TO OUR SCIENCE AND METHODOLOGY Suitable for the Public with helpful external links (in red) Thank you for visiting, and welcome to our journey and quest to understand how galaxies form and evolve.

A few quasars show very broad (with velocities of several thousands of km s1) absorption lines at redshifts close to that of the quasar, giving rise to the nomenclature ‘BAL’ (Broad Ab-sorption Line) systems/quasars.

These are believed to be produced by material thrown out by the quasars and are intrinsic to the quasar. We report the Balmer broad absorption lines (BALs) in the quasar SDSS J+ discovered from the SDSS data, and present a detailed analysis of the Cited by: 5.

The Properties of Intergalactic C IV and Si IV Absorption, I: Optimal Analysis of an Extremely High S/N Quasar Sample Antoinette Songaila1 Institute for Astronomy, University of Hawaii, Woodlawn Drive, Honolulu, HI [email protected] ABSTRACT We have analyzed the properties of metals in the high redshift intergalactic.This is an exhaustive review of our theoretical and observational knowledge of gravitational lensing 10 years after the discovery of the first lensed quasar, Q+ Gravitational optics, optical, infrared, and radio observations of quasar-lens candidates, microlensing, arcs .Get this from a library!

Gravitational lensing: proceedings of a workshop held in Toulouse, France, September[Y Mellier; B Fort; G Soucail;] -- This is an exhaustive review of our theoretical and observational knowledge of gravitational lensing 10 years after the discovery of the first lensed quasar, Q+ Gravitational optics, optical.