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2000ApJ...544..242B - Astrophys. J., 544, 242-257 (2000/November-3)
ROSAT evidence for intrinsic oxygen absorption in cooling flow galaxies and groups.
BUOTE D.A.
Abstract (from CDS):
Within the central ∼10-20 kpc, where the constraints are most secure, the mass of the ionized absorber is consistent with most (perhaps all) of the matter deposited by a cooling flow over the lifetime of the flow. Since the warm absorber produces no significant H or He absorption, the large absorber masses are consistent with the negligible atomic and molecular H inferred from H I and CO observations of cooling flows. It is also found that if T≳2x105 K, then the optical and far-ultraviolet emission implied by the warm gas does not violate published constraints. An important theoretical challenge is to understand how the warm temperature is maintained and how the gas is supported gravitationally, and we discuss possible solutions to these problems that would require fundamental modification of the standard cooling flow scenario. Finally, we discuss how the prediction of warm ionized gas as the product of mass dropout in these and other cooling flows can be verified with new Chandra and XMM observations.
Abstract Copyright: ∼
Journal keyword(s): Galaxies: Cooling Flows - Galaxies: Intergalactic Medium - X-Rays: Galaxies
Simbad objects: 14
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