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12 papers · 2 filters
Fractal Structure in Galactic Star Fields
Bruce G. Elmegreen, Debra Meloy Elmegreen
The fractal structure of star formation on large scales in disk galaxies is studied using the size distribution function of stellar aggregates in kpc-scale star fields. Achival HST…
The Importance of Nonlinear H2 Photoexcitiation in Strongly Irradiated PDRs
P. P. Sorokin, J. H. Glownia, R. T. Hodgson
It is shown that, under sufficiently intense OB-star illumination of a stationary photoexcitation front (PDR), nonlinear H2 photoexcitation processes comprising driven resonant two…
The Origin of The Stellar Initial Mass Function
Bruce G. Elmegreen
Observations and theories of the stellar initial mass function are reviewed. The universality and large total mass range of the power law portion of the IMF suggest a connection be…
A Fractal Analysis of the HI Emission from the Large Magellanic Cloud
Bruce G. Elmegreen, Sungeun Kim, Lister Staveley-Smith
A composite map of HI in the LMC using the ATCA interferometer and the Parkes multibeam telescope was analyzed in several ways in an attempt to characterize the structure of the ne…
The detection of spiral arm modulation in the mass distribution of an optically flocculent galaxy
Ivanio Puerari, David L. Block, Bruce G. Elmegreen +2
Spiral arm modulation in NGC 4062 (an optical flocculent) is detected for the first time; the Fourier spectra of NGC 4062 and NGC 5248 (a classic grand design in optical images) ar…
HST Observations of the Interacting Galaxies NGC 2207 and IC 2163
B. G. Elmegreen, M. Kaufman, C. Struck +11
Hubble Space Telescope images of the galaxies NGC 2207 and IC 2163 show star formation and dust structures in a system that has experienced a recent grazing encounter. Tidal forces…