Medium-term Variability in Emission from the Orion Nebula

Bibcode
2008ASPC..390..106B
Beckman, J. E.; Gutiérrez, L.; Giammanco, C.
Bibliographical reference

Pathways Through an Eclectic Universe ASP Conference Series, Vol. 390, proceedings of the conference held 23-27 April, 2007 at Santiago del Teide, Tenerife, Spain. Edited by J. H. Knapen, T. J. Mahoney, and A. Vazdekis San Francisco: Astronomical Society of the Pacific, 2008., p.106

Advertised on:
6
2008
Number of authors
3
IAC number of authors
0
Citations
0
Refereed citations
0
Description
Measuring the surface brightness changes in HST images in Hα and [O III]5007 Å taken with a time interval of 6.84 yr, we show how to detect separately the changes due to density variations and those due to temperature variations. Following O'Dell et al., we used the brightness changes to show and measure proper motions in streams and fronts at up to 140 km s-1. The strongest density variations coincide with the proper motions, while in quiescent zones we can detect mean temperature variations of tens of degrees along the line of sight in the time interval between the observations.
Type
Non-refereed

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