366 citations · 1.5k across the 21 of their papers we have counts for
16 papers · 1 filter
Galactic disc warps due to intergalactic accretion flows onto the disc
M. Lopez-Corredoira, J. Betancort-Rijo, J. E. Beckman
The accretion of the intergalactic medium onto the gaseous disc is used to explain the generation of galactic warps. A cup-shaped distortion is expected, due to the transmission of…
Temperature fluctuations in HII regions: ionization by Cosmic Rays as a key mechanism
C. Giammanco, J. E. Beckman
We present a detailed model capable of explaining quantitatively the temperature fluctuations observed in luminous, large HII regions. The model is based on two assumptions which w…
Effects of photon escape on diagnostic diagrams for HII regions
C. Giammanco, J. E. Beckman, B. Cedres
In this article we first outline the mounting evidence that a significant fraction of the ionizing photons emitted by OB stars within HII regions escape from their immediate surrou…
The internal dynamical equilibrium of HII regions: a statistical study
M. Relano, J. E. Beckman, A. Zurita +2
We present an analysis of the integrated Halpha emission line profiles for the HII region population of the spiral galaxies NGC 1530, NGC 6951 and NGC 3359. We show that 70% of the…
Propagation of ionizing radiation in HII regions: the effects of optically thick density fluctuations
C. Giammanco, J. E. Beckman, A. Zurita +1
The accepted explanation of the observed dichotomy of two orders of magnitude between in situ measurements of electron density in HII regions, derived from emission line ratios, an…
Stellar Disk Truncations: Where do we stand ?
M. Pohlen, J. E. Beckman, S. Huettemeister +3
In the light of several recent developments we revisit the phenomenon of galactic stellar disk truncations. Even 25 years since the first paper on outer breaks in the radial light…