Skip to content
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Evolution of the radio-x-ray coupling throughout an entire outburst of Aquila X-1
Astrophysical Journal Letters, Volume 716, No. 2 PART 2, Year 2010
Notification
URL copied to clipboard!
Description
The 2009 November outburst of the neutron star X-ray binary Aquila X-1 (Aql X-1) was observed with unprecedented radio coverage and simultaneous pointed X-ray observations, tracing the radio emission around the full X-ray hysteresis loop of the outburst for the first time. We use these data to discuss the disk-jet coupling, finding the radio emission to be consistent with being triggered at state transitions, both from the hard to the soft spectral state and vice versa. Our data appear to confirm previous suggestions of radio quenching in the soft state above a threshold X-ray luminosity of ∼10% of the Eddington luminosity. We also present the first detections of Aql X-1 with very long baseline interferometry, showing that any extended emission is relatively diffuse and consistent with steady jets rather than arising from discrete, compact knots. In all cases where multi-frequency data were available, the source radio spectrum is consistent with being flat or slightly inverted, suggesting that the internal shock mechanism that is believed to produce optically thin transient radio ejecta in black hole X-ray binaries is not active in Aql X-1. © 2010. The American Astronomical Society. All rights reserved..
Authors & Co-Authors
Miller-Jones, James C.A.
United States, Charlottesville
National Radio Astronomy Observatory
Sivakoff, Gregory R.
United States, Charlottesville
University of Virginia
Altamirano, Diego
Netherlands, Amsterdam
Universiteit Van Amsterdam
Tudose, Valeriu
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
Romania, Bucharest
Academia Româna
Romania, Bucharest
Institute of Atomic Physics, Bucharest
Migliari, Simone
Spain, Madrid
European Space Astronomy Centre
Dhawan, Vivek
United States, Socorro
National Radio Astronomy Observatory Socorro
Fender, Robert P.
Netherlands, Amsterdam
Universiteit Van Amsterdam
United Kingdom, Southampton
University of Southampton
Garrett, Michael A.
United States, Madison
University of Wisconsin-madison
Netherlands, Leiden
Universiteit Leiden
Australia, Hawthorn
Swinburne University of Technology
Heinz, Sebastian
United States, Madison
University of Wisconsin-madison
K̈ording, Elmar G.
France, Gif-sur-yvette
Astrophysique, Instrumentation et Modélisation de Paris-saclay
Krimm, Hans A.
United States, Greenbelt
Nasa Goddard Space Flight Center
United States, Columbia
Universities Space Research Association
Linares, Manuel
United States, Cambridge
Mit Kavli Institute for Astrophysics and Space Research
Maitra, Dipankar
United States, Ann Arbor
University of Michigan, Ann Arbor
Markoff, Sera B.
Netherlands, Amsterdam
Universiteit Van Amsterdam
Paragi, Zsolt
Netherlands, Dwingeloo
Joint Institute for Vlbi in Europe
Hungary, Budapest
Magyar Tudomanyos Akademia
Remillard, Ronald A.
United States, Cambridge
Mit Kavli Institute for Astrophysics and Space Research
Rupen, Michael P.
United States, Socorro
National Radio Astronomy Observatory Socorro
Rushton, Anthony P.
United Kingdom, Southampton
University of Southampton
Russell, David M.
Netherlands, Amsterdam
Universiteit Van Amsterdam
Sarazin, Craig L.
United States, Charlottesville
University of Virginia
Spencer, Ralph E.
United Kingdom, Manchester
The University of Manchester
Statistics
Citations: 60
Authors: 21
Affiliations: 20
Identifiers
Doi:
10.1088/2041-8205/716/2/L109
ISSN:
20418205
Research Areas
Environmental
Health System And Policy