THE INTERSTELLAR CARBON ABUNDANCE. II. RHO OPHIUCHI AND BETA SCORPII

We describe a procedure designed to obtain increased sensitivity from high-dispersion WE spectra by using a flat-field spectrum to remove nonrandom noise due to the response pattern of the SEC vidicon detector. Application of this procedure to spectra of p Oph and B¹ Seo near the spin-forbidden inte...

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Veröffentlicht in:	Publ. Astron. Soc. Pac.; (United States) 1986-09, Vol.98 (607), p.857-861
Hauptverfasser:	WELTY, D. E., YORK, D. G., HOBBS, L. M.
Format:	Artikel
Sprache:	eng
Schlagworte:	ABUNDANCE Astronomy Astrophysics CARBON CHEMICAL COMPOSITION CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS Earth, ocean, space ELEMENTS Exact sciences and technology High dispersion spectrographs Interstellar medium (ism) and nebulae in milky way INTERSTELLAR SPACE Line spectra Noise spectra NONMETALS Photons SPACE SPECTRA 640105 > Astrophysics & Cosmology-- Galaxies Spectral sensitivity Stellar spectra Stellar spectral lines Stellar systems. Galactic and extragalactic objects and systems. The universe ULTRAVIOLET SPECTRA Wavelengths
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Zusammenfassung:	We describe a procedure designed to obtain increased sensitivity from high-dispersion WE spectra by using a flat-field spectrum to remove nonrandom noise due to the response pattern of the SEC vidicon detector. Application of this procedure to spectra of p Oph and B¹ Seo near the spin-forbidden interstellar λ2325 line of C II yields 2 σ upper limits on absorption of Wλ ≲4 mÅ. The resulting depletion of carbon from the interstellar gas toward ñ Oph exceeds a factor of 1.4.
ISSN:	0004-6280 1538-3873
DOI:	10.1086/131834