IMAPS Observations Of Atomic Deuterium Toward Delta ORI A

Details IMAPS Observations Of Atomic Deuterium Toward Delta ORI A IMAPS Observations Of Atomic Deuterium Toward Delta ORI A

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aas...193.6517j&link_type=abstract

American Astronomical Society, 193rd AAS Meeting, #65.17; Bulletin of the American Astronomical Society, Vol. 30, p.1342

Other

Scientific paper

The Interstellar Medium Absorption Profile Spectrograph (IMAPS) recorded the Ldelta and Lepsilon D and H absorption features in the spectrum of delta Ori A during the ORFEUS-SPAS II mission in late 1996. The resolution of 4 km s(-1) provides a substantial improvement over previous spectra recorded by the Copernicus satellite. Our 90% confidence interval for the deuterium column density toward delta Ori A is 0.96 < N(D I) < 1.45x 10(15) cm(-2) . To derive the ratio of atomic D to H, we evaluated the damped Lalpha profile recorded in many high-dispersion spectra of delta Ori A in the IUE archive and used the dispersion of the results to help us estimate the probable systematic errors. From this exercise, we conclude that N(H I)=1.54 +/- 0.08 x 10(20) cm(-2) . Combining the D and H results gives D/H=7.5(+1.9}_{-1.4) x 10(-6) , a finding that is lower than 1.5x 10(-5) reported for lines of sight to cool stars within the local region and also IMAPS results for gamma (2) Vel and zeta Pup reported by Sonneborn, et al (another abstract in this session). Our conclusion that D/H could vary in the interstellar medium in the local region of our Galaxy is consistent with independent findings by Vidal-Madjar, et al. (1998: Astr. Ap. 338, 694) for the line of sight to G191-B2B.

Affiliated with

Also associated with

No associations

Rating

IMAPS Observations Of Atomic Deuterium Toward Delta ORI A does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with IMAPS Observations Of Atomic Deuterium Toward Delta ORI A, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and IMAPS Observations Of Atomic Deuterium Toward Delta ORI A will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-995274