SIMBAD references

2012AJ....143...97A - Astron. J., 143, 97 (2012/April-0)

Faint extended OH emission from the local interstellar medium in the direction l ~ 108°, b ~ 5°.

ALLEN R.J., RODRIGUEZ M.I., BLACK J.H. and BOOTH R.S.

Abstract (from CDS):

We have mapped faint 1667 OH line emission (TA~ 20-40 mK in our ~30' beam) along many lines of sight in the Galaxy covering an area of ~4°x4° in the general direction of l ~ 108°, b ~ 5°. The OH emission is widespread, similar in extent to the local H I (r ≲ 2 kpc) both in space and in velocity. The OH profile amplitudes show a good general correlation with those of H I in spectral channels of ~1 km/s; this relation is described by TA(OH) ~1.50x10–4 TB (H I) for values of TB(H I) ≲ 60-70 K. Beyond this the H I line appears to "saturate," and few values are recorded above ~90 K. However, the OH brightness continues to rise, by a further factor ~3. The OH velocity profiles show multiple features with widths typically 2-3 km/s, but less than 10% of these features are associated with CO(1-0) emission in existing surveys of the area smoothed to comparable resolution.

Abstract Copyright: ∼

Journal keyword(s): ISM: molecules - ISM: structure - local interstellar matter - surveys

Errata: erratum vol. 143, art. 97 (2013)

Simbad objects: 7

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