44 citations · 326 across the 23 of their papers we have counts for
23 papers
The Owl and other strigiform nebulae: multipolar cavities within a filled shell
Ma. T. García-Díaz, W. Steffen, W. J. Henney +4
We present the results of long-slit echelle spectroscopy and deep narrow-band imaging of the Owl Nebula (NGC 3587), obtained at the \textit{Observatorio Astronómico Nacional, San P…
Fine-structure constant constraints on dark energy: II. Extending the parameter space
C. J. A. P. Martins, A. M. M. Pinho, P. Carreira +3
Astrophysical tests of the stability of fundamental couplings, such as the fine-structure constant , are a powerful probe of new physics. Recently these measurements, combined w…
Evidence for a [WR] or WEL-type binary nucleus in the bipolar planetary nebula Vy 1-2
S. Akras, P. Boumis, J. Meaburn +3
We present high-dispersion spectroscopic data of the compact planetary nebula Vy 1-2, where high expansion velocities up to 100 km/s are found in the Ha, [N II] and [O III] emissio…
The Present and Future of Planetary Nebula Research. A White Paper by the IAU Planetary Nebula Working Group
K. B. Kwitter, R. H. Méndez, M. Peña +10
We present a summary of current research on planetary nebulae and their central stars, and related subjects such as atomic processes in ionized nebulae, AGB and post-AGB evolution.…
Two rings but no fellowship: LoTr 1 and its relation to planetary nebulae possessing barium central stars
A. A. Tyndall, D. Jones, H. M. J. Boffin +7
LoTr 1 is a planetary nebula thought to contain an intermediate-period binary central star system (that is, a system with an orbital period, P, between 100 and, say, 1500 days). Th…
Coulomb forces in neutron star crusts
C. O. Dorso, P. A. Giménez Molinelli, J. A. López +1
We study the role the proton-electron gas interaction has on the formation of nuclear structures in neutron star crusts. Using a classical molecular dynamics model we study isospin…