2017
DOI: 10.1051/0004-6361/201730899
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Abstract: Context. Galaxies with H 2 O megamaser disks are active galaxies in whose edge-on accretion disks 22 GHz H 2 O maser emission has been detected. Because their geometry is known, they provide a unique view into the properties of active galactic nuclei. Aims. The goal of this work is to investigate the nuclear environment of galaxies with H 2 O maser disks and to relate the maser and host galaxy properties to those of the radio continuum emission of the galaxy. Methods. The 33 GHz (9 mm) radio continuum properti… Show more

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Cited by 11 publications
(20 citation statements)
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References 72 publications
(136 reference statements)
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“…In our pilot project (Kamali et al 2017) we demonstrated a correlation between the disk's inner and outer radii and the 33 GHz radio luminosity of galaxies with H 2 O masers in their nuclear disks (i.e., both inner and outer radii of the disk increase as the radio luminosity increases). In this work, we find a similar correlation for inner and outer disk radius versus the 5 GHz luminosities (Fig.…”
Section: Radio Luminosity Vs Maser Disk Radiusmentioning
confidence: 94%
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“…In our pilot project (Kamali et al 2017) we demonstrated a correlation between the disk's inner and outer radii and the 33 GHz radio luminosity of galaxies with H 2 O masers in their nuclear disks (i.e., both inner and outer radii of the disk increase as the radio luminosity increases). In this work, we find a similar correlation for inner and outer disk radius versus the 5 GHz luminosities (Fig.…”
Section: Radio Luminosity Vs Maser Disk Radiusmentioning
confidence: 94%
“…Furthermore, the pressure outside the outer disk is less than the critical pressure which permits the existence of the molecules (Neufeld et al 1994) and this critical pressure depends on the X-ray luminosity (for detailed analysis see Neufeld & Maloney 1995). Although a correlation between the X-ray luminosity and the maser disk size is expected, former studies did not find such a correlation (Kamali et al 2017). High energy electrons are responsible for both synchrotron radio emission and the synchrotron self Compton X-ray radiation (Falcke & Biermann 1995).…”
Section: Radio Luminosity Vs Maser Disk Radiusmentioning
confidence: 98%
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“…In general, the minimum degree of disk-jet misalignment needed to satisfy Equation 9 for a given value of θ will occur when β = 1, so we can impose this value to determine a lower limit on the misalignment. For a typical spectral index of α = 0.7 (Condon et al 1998;Kamali et al 2017), we find that the disk-jet misalignment must be at least ∼7 • ; even for a spectral index as steep as α = 2, the misalignment can be no smaller than ∼5 • . Using a more conservative 3σ upper limit for the unmeasured southern jet component yields misalignment angles of at least ∼5 • and ∼3 • for α = 0.7 and α = 2, respectively.…”
Section: Vlbi Continuum Emissionmentioning
confidence: 75%
“…Slope, intercept, correlation coefficient and p-values (likelihood that there is no correlation) are also given. From Kamali et al (2017). kinetic temperatures tend to be high, thus providing suitable conditions for the presence of non-metastable ammonia transitions interfereing with the 22 GHz maser emission from H 2 O if there is a continuum which can be absorbed. For an evaluation of the intensity of the NH 3 (3,1) line, then the detection of other non-metastable cm-wave NH 3 inversion transitions will be mandatory.…”
Section: A Caveat When Analyzing 22 Ghz H 2 O Maser Emissionmentioning
confidence: 99%