An ultra-high-resolution study of the interstellar medium in the direction of α Ophiuchi

Details An ultra-high-resolution study of the interstellar medium in the direction of α Ophiuchi An ultra-high-resolution study of the interstellar medium in the direction of α Ophiuchi

Nov 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001mnras.327..841c&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 327, Issue 3, pp. 841-848.

Astronomy and Astrophysics

Astronomy

15

Line: Profiles, Stars: Individual: Alpha Oph, Ism: Structure

Scientific paper

I present very high resolution (R=400000 and R=880000) observations of interstellar Caii absorption lines towards eight early-type stars situated within 15° of α Oph on the sky. I confirm an earlier result that the interstellar structure responsible for the anomalously strong Caii absorption towards α Oph has a spatial extent of <~1pc (and is probably very much smaller). Many discrete interstellar absorption components are apparent in these high-resolution data, but while several have velocities in the range expected for the local interstellar medium (LISM), no convincing detections of either the local interstellar cloud (LIC), or the so-called G cloud, were made. In the former case, I argue that the relatively weak LIC components are masked by components arising in more distant clouds, but which have LISM-like velocities owing to the pervasive influence of outflow from the Sco-Cen association. The non-detection of the G cloud is more problematical, and I tentatively argue that, previous claims notwithstanding, this feature does not extend to galactic latitudes as high as +15° in this direction.

Affiliated with

Also associated with

No associations

Rating

An ultra-high-resolution study of the interstellar medium in the direction of α Ophiuchi 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 An ultra-high-resolution study of the interstellar medium in the direction of α Ophiuchi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An ultra-high-resolution study of the interstellar medium in the direction of α Ophiuchi will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1558564