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arXiv:astro-ph/0402204 (astro-ph)
[Submitted on 9 Feb 2004]

Title:X-ray and Optical Filaments in M87

Authors:William B. Sparks, Megan Donahue, Andres Jordan, Laura Ferrarese, Patrick Cote
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Abstract: We compare a very deep X-ray image of M87, at the center of the Virgo Cluster, to high-quality optical images of the low excitation emission-line gas in the same region. There are striking coincidences of detail between the two. We explore the possiblity that this represents a thermal interaction between hot gas at 10^7 K and warm gas at 10^4 K. We find two temperatures are present in the X-ray gas, with the lower more prevelant in the vicinity of the optical filaments. Electron conduction from the hot phase to the cooler one provides a quantitatively acceptable energy source for the optical filaments, and we show additionally that it can do so for the brightest X-ray cluster, Perseus. If operative, conduction in the presence of gas-rich galaxy mergers, may explain the presence of "cool cores" in clusters of galaxies.
Comments: 18 pages, 6 figures, 2 tables
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:astro-ph/0402204
  (or arXiv:astro-ph/0402204v1 for this version)
  https://doi.org/10.48550/arXiv.astro-ph/0402204
Journal reference: Astrophys.J. 607 (2004) 294-301
Related DOI: https://doi.org/10.1086/383189

Submission history

From: Sharon Toolan [view email]
[v1] Mon, 9 Feb 2004 19:24:11 UTC (614 KB)
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