Compact symmetric objects and supermassive binary black holes in the VLBA Imaging and Polarimetry Survey
MetadataShow full item record
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2016 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
We present multifrequency Very Long Baseline Array (VLBA) follow-up observations of VLBA Imaging and Polarimetry Survey sources identified as likely compact symmetric objects (CSOs) or supermassive binary black holes (SBBHs). We also present new spectroscopic redshifts for 11 sources observed with the Hobby-Eberly Telescope. While no new SBBHs can be confirmed from these observations, we have identified 24 CSOs in the sample, 15 of which are newly designated, and refuted 52 candidates leaving 33 unconfirmed candidates. This is the first large uniform sample of CSOs which can be used to elicit some of the general properties of these sources, including morphological evolution and environmental interaction. We have detected polarized emission from two of these CSOs the properties of which are consistent with active galactic nuclei unification schemes.
Showing items related by title, author, creator and subject.
Making a new democracy work: the role of civil society organisations (CSOs) in combating corruption during democratic transition in IndonesiaSetiyono, Budi (2010)Corruption has often stimulated the collapse of authoritarian regimes and was followed by democratisation in a number of developing countries. Many new democratic regimes, however, have also been failed to control corruption ...
Girkin, F.; Shannon, E.; Zimitat, Craig; Elliot, K. (2017)Objective: To explore public value as a management tool for measuring outcomes, in Community Support Organisations (CSOs) and determine if further research is warranted. Design: A literature review on public value and ...
Rathnayake, U.; Faisal Anwar, A.H.M. (2019)Sewer network planners use control algorithms, based on optimization techniques, to control urban wastewater systems. These control algorithms have been used to ease the stress on the sewer networks and then, to reduce ...