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• W2007345743 endingPage "70" @default.
• W2007345743 startingPage "70" @default.
• W2007345743 abstract "We present a model in which the 22 GHz H$_2$O masers observed in star-forming regions occur behind shocks propagating in dense regions (preshock density $n_0 sim 10^6 - 10^8$ cm$^{-3}$). We focus on high-velocity ($v_s > 30$ km s$^{-1}$) dissociative J shocks in which the heat of H$_2$ re-formation maintains a large column of $sim 300-400$ K gas; at these temperatures the chemistry drives a considerable fraction of the oxygen not in CO to form H$_2$O. The H$_2$O column densities, the hydrogen densities, and the warm temperatures produced by these shocks are sufficiently high to enable powerful maser action. The observed brightness temperatures (generally $sim 10^{11} - 10^{14}$ K) are the result of coherent velocity regions that have dimensions in the shock plane that are 10 to 100 times the shock thickness of $sim 10^{13}$ cm. The masers are therefore beamed towards the observer, who typically views the shock edge-on, or perpendicular to the shock velocity; the brightest masers are then observed with the lowest line of sight velocities with respect to the ambient gas. We present numerical and analytic studies of the dependence of the maser inversion, the resultant brightness temperature, the maser spot size and shape, the isotropic luminosity, and the maser region magnetic field on the shock parameters and the coherence path length; the overall result is that in galactic H$_2$O 22 GHz masers these observed parameters can be produced in J shocks with $n_0sim 10^6 - 10^8$ cm$^{-3}$ and $v_s sim 30 -200$ km s$^{-1}$. A number of key observables such as maser shape, brightness temperature, and global isotropic luminosity depend only on the particle flux into the shock, $j=n_0v_s$, rather than on $n_0$ and $v_s$ separately." @default.
• W2007345743 created "2016-06-24" @default.
• W2007345743 creator A5024808908 @default.
• W2007345743 creator A5050357373 @default.
• W2007345743 creator A5055793246 @default.
• W2007345743 date "2013-07-26" @default.
• W2007345743 modified "2023-10-18" @default.
• W2007345743 title "INTERSTELLAR H₂O MASERS FROM J SHOCKS" @default.
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• W2007345743 cites W1967039664 @default.
• W2007345743 cites W1968443772 @default.
• W2007345743 cites W1973292771 @default.
• W2007345743 cites W1975462957 @default.
• W2007345743 cites W1976296179 @default.
• W2007345743 cites W1977324040 @default.
• W2007345743 cites W1982025633 @default.
• W2007345743 cites W1987354470 @default.
• W2007345743 cites W1987581356 @default.
• W2007345743 cites W1987607849 @default.
• W2007345743 cites W1988907310 @default.
• W2007345743 cites W1989016491 @default.
• W2007345743 cites W1990933342 @default.
• W2007345743 cites W1991049142 @default.
• W2007345743 cites W1993230081 @default.
• W2007345743 cites W1994081933 @default.
• W2007345743 cites W1996375368 @default.
• W2007345743 cites W1996700593 @default.
• W2007345743 cites W2003631895 @default.
• W2007345743 cites W2003948574 @default.
• W2007345743 cites W2007156045 @default.
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• W2007345743 cites W2020405635 @default.
• W2007345743 cites W2025719475 @default.
• W2007345743 cites W2034242758 @default.
• W2007345743 cites W2036066908 @default.
• W2007345743 cites W2038722153 @default.
• W2007345743 cites W2042333815 @default.
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• W2007345743 cites W2047647445 @default.
• W2007345743 cites W2048186827 @default.
• W2007345743 cites W2050461555 @default.
• W2007345743 cites W2053890704 @default.
• W2007345743 cites W2054828943 @default.
• W2007345743 cites W2055205620 @default.
• W2007345743 cites W2055293190 @default.
• W2007345743 cites W2056239087 @default.
• W2007345743 cites W2057396814 @default.
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• W2007345743 cites W2081944002 @default.
• W2007345743 cites W2084956540 @default.
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• W2007345743 cites W2136039084 @default.
• W2007345743 cites W2149584898 @default.
• W2007345743 cites W2157070829 @default.
• W2007345743 cites W2166542948 @default.
• W2007345743 cites W2170243185 @default.
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• W2007345743 doi "https://doi.org/10.1088/0004-637x/773/1/70" @default.
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