Star Formation and Techniques in Infrared and Mm-Wave Astronomy
DOI: 10.1007/3-540-58196-0_46
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N(CO)/N(H2)-ratio in the local interstellar medium

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Cited by 18 publications
(29 citation statements)
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“…3, independent of the different assumptions used in the modeling (see Table C.1). Harjunpää & Mattila (1996) and Anderson et al (1999) have also found similar abundance ratios in dark clouds and cores. …”
Section: Modelingmentioning
confidence: 57%
“…3, independent of the different assumptions used in the modeling (see Table C.1). Harjunpää & Mattila (1996) and Anderson et al (1999) have also found similar abundance ratios in dark clouds and cores. …”
Section: Modelingmentioning
confidence: 57%
“…The observed temperature gradients are nevertheless quite small, and even going from, say, T ex = 8 K to T ex = 15 K does not produce a large enough difference to explain the observed N(C 18 O) variations in clumps (see the discussion e.g. in Harjunpää & Mattila 1996). Furthermore, the neglection of the temperature gradient should lead to similar variations in clumps with equal maximum extinction.…”
Section: Discussionmentioning
confidence: 91%
“…Hayakawa et al (2001) studied the ratio also in different parts within Cha I. Harjunpää and Mattila (1996) derived the N(C 18 O)/A V ratio for about 20 individual lines of sight across Cha I using the SEST telescope and near-IR extinction values from literature. The results of the present study are compared with these results in Sect.…”
Section: Chamaeleon Cloud Complexmentioning
confidence: 99%
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“…relation from Harjunpää & Mattila (1996) and Cardelli et al (1989), it would normally be possible to get column densities for molecular hydrogen from the extinction data alone. However, as the dense cores along the filament have high extinction values, acquiring reliable values for A V around them by using the NICER-method alone is unreliable due to very low star densities close to and inside the cores.…”
Section: H 2 Column Densitiesmentioning
confidence: 99%