- How to hide large-scale outflows: size constraints on the jets of Sgr A*
- Monthly Notices of the Royal Astronomical Society
- Pages (from-to)
- Document type
- Faculty of Science (FNWI)
- Anton Pannekoek Institute for Astronomy (API)
Despite significant strides made towards understanding accretion, outflow and emission processes in the Galactic Centre supermassive black hole Sagittarius A*, the presence of jets has been neither rejected nor proven. We investigate here whether the combined spectral and morphological properties of the source at radio through near-infrared wavelengths are consistent with the predictions for inhomogeneous jets. In particular, we construct images of jets at a wavelength of 7 mm based on models that are consistent with the spectrum of Sgr A*. We then compare these models through closure quantities with data obtained from the Very Long Baseline Array at 7 mm. We find that the best-fitting jet models give comparable or better fits than the best-fitting Gaussian models for the intrinsic source found in previous analyses. The best-fitting jet models are bipolar, are highly inclined to the line of sight (theta >~ 75°), may favour a position angle on the sky of 105°, and have compact bases with sizes of a few gravitational radii.
- go to publisher's site
- DOI: 10.1111/j.1365-2966.2007.12071.x; eprintid: arXiv:astro-ph/0702637
If you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library, or send a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible.