Fine-structure infrared lines from the Cassiopeia A knots

Home

All issues

Volume 509 (January 2010)

A&A, 509 (2010) A59

Full HTML

Free Access

Table 8:

Estimated FMK pre-shock ionic abundances $n_{\rm ion}/n_{\rm O}$ computed assuming that the lines originate only in the pre-shock PIR. (See text for details).
Line	I/I(5007 Å)	$T_{\rm e}$ , K	$n_{\rm e}$ , cm^-3	$\varepsilon$ , cm³/s	IP, eV	$\Delta t$ , s	$n_{\rm ion}/n$ (O)	$n_{\rm element}$ /n(O) ^**
[Ar II] 6.985 $\mu$ m	0.5	$2.0 \times 10^4$	100	$4 \times 10^{-8}$	27.6	$5 \times 10^6$	1.0^*	0.005
[Ar V] 13.07 $\mu$ m	0.003	7000	250	$8\times10^{-7}$	75.1	$5\times10^7$	$8\times10^{-5}$	0.005
[Ne II] 12.81 $\mu$ m	0.10	$1.5\times10^4$	150	$5\times10^{-8}$	41.0	$1.4\times10^7$	0.06	0.02
[Fe II] 17.94 $\mu$ m	0.03	$2.0 \times 10^4$	50	$1.1\times10^{-8}$	16.2	$9\times10^5$	5.5^*	0.005
[S III] 33.48 $\mu$ m	0.04	$1.5\times10^4$	150	$3.0\times10^{-7}$	34.8	$1\times10^7$	0.015	0.05
[Si II] 34.81 $\mu$ m	0.07	$2.0 \times 10^4$	50	$1.5\times10^{-7}$	16.4	$1\times10^6$	0.7^*	0.05
[O III] 88.36 $\mu$ m	0.10	$1.0\times10^4$	200	$4.0\times10^{-8}$	54.9	$3\times10^7$	1.1	1.0

^* Shown to arises mostly in the post-shock photoionized region; see Sect. 5; ^** atomic number densities with respect to oxygen, see Table 9.

Source LaTeX | All tables | In the text

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.