Skip to main content Accessibility help
×
Home
Hostname: page-component-59b7f5684b-7j4dq Total loading time: 0.285 Render date: 2022-10-05T00:19:52.015Z Has data issue: true Feature Flags: { "shouldUseShareProductTool": true, "shouldUseHypothesis": true, "isUnsiloEnabled": true, "useRatesEcommerce": false, "displayNetworkTab": true, "displayNetworkMapGraph": false, "useSa": true } hasContentIssue true

Long term Arecibo monitoring of the water megamaser in MG J0414+0534

Published online by Cambridge University Press:  24 July 2012

Paola Castangia
Affiliation:
INAF-Osservatorio Astronomico di Cagliari, Loc. Poggio dei Pini, Strada 54, 09012 Capoterra (CA), Italy email: pcastang@oa-cagliari.inaf.it
C. M. Violette Impellizzeri
Affiliation:
ALMA, Chile email: vimpelli@alma.cl
John P. McKean
Affiliation:
ASTRON, Oude Hoogeveensedijk 4, 7991 PD Dwingeloo, the Netherlands
Christian Henkel
Affiliation:
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany
Andreas Brunthaler
Affiliation:
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany
Alan L. Roy
Affiliation:
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany
Olaf Wucknitz
Affiliation:
Argelander-Institut für Astronomie, Auf dem Hügel 71, D-53121 Bonn, Germany
Rights & Permissions[Opens in a new window]

Abstract

HTML view is not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We monitored the 22 GHz maser line in the lensed quasar MG J0414+0534 at z = 2.64 with the 300-m Arecibo telescope for almost two years to detect possible additional maser components and to measure a potential velocity drift of the lines. The main maser line profile is complex and can be resolved into a number of broad features with line widths of 30-160 km s−1. A new maser component was tentatively detected in October 2008 at a velocity of +470 km s−1. After correcting for the estimated lens magnification, we find that the H2O isotropic luminosity of the maser in MG J0414+0534 is ~26,000 solar luminosities, making this source the most luminous ever discovered. Both the main line peak and continuum flux densities are surprisingly stable throughout the period of the observations. An upper limit on the velocity drift of the main peak of the line has been estimated from our observations and is of the order of 2 km s−1 per year. We discuss the results of the monitoring in terms of the possible nature of the maser emission, associated with an accretion disk or a radio jet. This is the first time that such a study is performed in a water maser source at high redshift, potentially allowing us to study the parsec-scale environment around a powerful radio source at cosmological distances.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2012

References

Barvainis, R. & Antonucci, R. 2005, ApJ, 628, 89CrossRefGoogle Scholar
Braatz, J. A., Wilson, A. S., & Henkel, C. 1996, ApJS, 106, 51CrossRefGoogle Scholar
Braatz, J. A., Wilson, A. S., Henkel, C., Gough, R., & Sinclair, M. 2003, ApJS, 146, 249CrossRefGoogle Scholar
Castangia, P., Impellizzeri, C. M. V., McKean, J. P., Henkel, C., Brunthaler, A., Roy, A. L., Wucknitz, O., Ott, J., & Momjian, E. 2011, A&A, 529, 150Google Scholar
Gallimore, J. F., Henkel, C., Baum, S. A., et al. 2001, ApJ, 556, 694CrossRefGoogle Scholar
Kuo, C. Y., Braatz, J. A., Condon, J. J., et al. 2011, ApJ, 727, 20CrossRefGoogle Scholar
Impellizzeri, C. M. V., McKean, J. P., Castangia, P., Roy, A. L., Henkel, C., Brunthaler, A., & Wucknitz, O. 2008, Nature, 456, 927CrossRefGoogle Scholar
Lawrence, C. R., Elston, R., Januzzi, B. T., & Turner, E. L. 1995, AJ 110, 2570CrossRefGoogle Scholar
McKean, J. P., Impellizzeri, C. M. V., Roy, A. L., Castangia, P., Samuel, F., Brunthaler, A., Henkel, C., & Wucknitz, O. 2011, MNRAS, 410, 2506CrossRefGoogle Scholar
Moore, C. B., Carilli, C. L., & Menten, K. M. 1999, ApJ, 510, L87CrossRefGoogle Scholar
Peck, A. B., Henkel, C., Ulvestad, J. S., et al. 2003, ApJ, 590, 149CrossRefGoogle Scholar
Pooley, D., Blackburne, J. A., Rappaport, S., & Schechter, P. L. 2007, ApJ, 661, 19CrossRefGoogle Scholar
You have Access

Save article to Kindle

To save this article to your Kindle, first ensure coreplatform@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.

Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

Find out more about the Kindle Personal Document Service.

Long term Arecibo monitoring of the water megamaser in MG J0414+0534
Available formats
×

Save article to Dropbox

To save this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you used this feature, you will be asked to authorise Cambridge Core to connect with your Dropbox account. Find out more about saving content to Dropbox.

Long term Arecibo monitoring of the water megamaser in MG J0414+0534
Available formats
×

Save article to Google Drive

To save this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you used this feature, you will be asked to authorise Cambridge Core to connect with your Google Drive account. Find out more about saving content to Google Drive.

Long term Arecibo monitoring of the water megamaser in MG J0414+0534
Available formats
×
×

Reply to: Submit a response

Please enter your response.

Your details

Please enter a valid email address.

Conflicting interests

Do you have any conflicting interests? *