Investigation of expansion in the Orion Nebula cluster

Details Investigation of expansion in the Orion Nebula cluster Investigation of expansion in the Orion Nebula cluster

May 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977aj.....82..360c&link_type=abstract

Astronomical Journal, vol. 82, May 1977, p. 360-363. Research supported by the Estate of Leander J. McCormick

Astronomy and Astrophysics

Astronomy

3

Astronomical Photography, Nebulae, Photographic Plates, Star Clusters, Stellar Motions, Atmospheric Refraction, Temperature Effects

Scientific paper

The Orion Nebula cluster has been investigated using 44 plates with a time span of about 42 years from a 26-in. refractor. Plate-constant reductions indicate a mean scale change of about -0.000116 over the interval, but differential atmospheric refraction reduces the scale change to approximately -0.000105. There is a 13.4-F average temperature difference between the two epochs. Thermal effects account for an observed scale difference of 0.000011 per deg F. The resultant scale change is about 0.000045; thus the present data show weak evidence for a small expansion among the Orion stars examined.

Affiliated with

Also associated with

No associations

Rating

Investigation of expansion in the Orion Nebula cluster 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 Investigation of expansion in the Orion Nebula cluster, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Investigation of expansion in the Orion Nebula cluster will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1882674