Oxygen in dense interstellar gas - The oxygen abundance of the star forming core ρ Ophiuchi A

R. Liseau; K. Justtanont

doi:10.1051/0004-6361/200811392

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Volume 499 / No 3 (June I 2009)

A&A, 499 3 (2009) 799-809

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Table 2:

ISO-LWS [O I] line fluxes and line ratios for the VLA 1623 outflow and the neighbouring $\rho ~ {\rm Oph}$ PDR.
TDT	RA(J2000)	Dec(J2000)	10¹² $F_{63~\mu {\rm m} }$	S/N₆₃	10¹² $F_{145~\mu {\rm m} }$	S/N₁₄₅	Project Name/	Comment
number	(h m s)	( $^{\circ}$ $^{\prime }$ $^{\prime \prime }$ )	(erg cm^-2 s^-1)		(erg cm^-2 s^-1)		Position
Flow
29200533^a	16 26 26.27	-24 24 30	$18.52 \pm 1.29$	14	$4.47 \pm 1.50$	2.6	VLA 1623	Origin (flow 0 $^{\prime \prime }$ offset)
29200534^b	16 26 17.22	-24 23 06	$22.54 \pm 0.80$	28	$4.22 \pm 0.86$	4.9	VLA 1623 flow(1, 1)	150 $^{\prime \prime }$ NW (PA=304 $^{\circ}$ )
29200534	16 26 23.25	-24 24 02	$18.52 \pm 1.27$	15	$4.47 \pm 1.35$	3.3	VLA 1623 flow(2, 1)	50 $^{\prime \prime }$ NW (PA=304 $^{\circ}$ )
29200534	16 26 29.29	-24 24 58	$21.92 \pm 1.00$	22	$8.94 \pm 1.62$	5.5	VLA 1623 flow(3, 1)	50 $^{\prime \prime }$ SE (PA=124 $^{\circ}$ )
PDR
45400801	16 25 55.56	-24 25 39	$10.08 \pm 0.77$	13	$4.02 \pm 0.80$	5.0	ROPH_EW ew2	$\sim$ south 1 $^{\prime }$ west 7 $^{\prime }$
45400801	16 26 08.74	-24 25 40	$12.66 \pm 0.62$	20	$4.92 \pm 1.09$	4.5	ROPH_EW ew3	$\sim$ south 1 $^{\prime }$ west 4 $^{\prime }$
45400801	16 26 21.92	-24 25 40	$10.56 \pm 0.81$	13	$3.45 \pm 0.60$	5.8	ROPH_EW ew4	$\sim$ south 1 $^{\prime }$ west 1 $^{\prime }$
45400801	16 26 35.10	-24 25 41	$12.66 \pm 0.36$	35	$4.41 \pm 0.86$	5.1	ROPH_EW ew5	$\sim$ south 1 $^{\prime }$ east 2 $^{\prime }$
PDR $_{\rm ave}$ ^c			$11.49 \pm 0.64$	18	$4.20 \pm 0.86$	4.9
Offset^d	16 26 35.32	-24 25 54	$\phantom{1}9.88 \pm 1.13$	9	$3.96 \pm 0.93$	4.2	VLA 1623 flow(4,1)	150 $^{\prime \prime }$ SE (PA=124 $^{\circ}$ )
Flow-PDR $_{\rm ave}$			11.05		0.02		552 = Line Ratio	150 $^{\prime \prime }$ NW (PA=304 $^{\circ}$ )
			7.03		0.27		26	50 $^{\prime \prime }$ NW (PA=304 $^{\circ}$ )
			7.96		0.27		29	Origin (flow 0 $^{\prime \prime }$ offset)
Flow-Offset			12.66		0.26		50 = Line Ratio	150 $^{\prime \prime }$ NW (PA=304 $^{\circ}$ )
			8.64		0.48		18	50 $^{\prime \prime }$ NW (PA=304 $^{\circ}$ )
			8.64		0.51		17	Origin (flow 0 $^{\prime \prime }$ offset)
$\langle$ Flow - PDR $_{\rm ave}$ $\rangle$			8.68		0.27		>25
$\langle$ Flow - Offset $\rangle$			9.98		0.41		24

Notes to the Table 3: ^a Centre position related to the strip map (TDT 29200534); ^b which is along position angle 124 $^{\circ}$ ( $\pm 180$ $^{\circ}$ ) with 150 $^{\prime \prime }$ spacings of 4 individual pointings; ^c the surrounding PDR provides one type of background estimate; ^d TDT 29200534: this position of the strip scan is outside the flow, yet close enough to serve as another reference position for background estimation.

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