1.9k citations · 12.9k across the 82 of their papers we have counts for
82 papers
A twisted and precessing Cepheid warp in the outer Milky Way disc
Walter Dehnen, Marcin Semczuk, Ralph Schönrich
We examine the Galactic warp in a sample of all classical Cepheids with Gaia DR3 radial velocity. In each radial bin, we determine (1) the inclined plane normal to the mean orbital…
Switching integrators reversibly in the astrophysical -body problem
David M. Hernandez, Walter Dehnen
We present a simple algorithm to switch between -body time integrators in a reversible way. We apply it to planetary systems undergoing arbitrarily close encounters and highly e…
Measuring bar pattern speeds from single simulation snapshots
Walter Dehnen, Marcin Semczuk, Ralph Schoenrich
We describe methods to measure simultaneously the orientation angle and pattern speed from single snapshots of simulated barred galaxies. Unlike previous attempts, our appr…
A family of potential-density pairs for galactic bars
Walter Dehnen, Hossam Aly
We present a family of analytical potential-density pairs for barred discs, which can be combined to describe galactic bars in a realistic way, including boxy/peanut components. We…
Spiral arms and the angular momentum gap in Milky Way Cepheids
Marcin Semczuk, Walter Dehnen, Ralph Schoenrich +1
The angular-momentum distribution of classical Cepheids in the outer Milky Way disc is bi-modal with a gap at , cor…
Age-morphology dependence of the Milky Way boxy/peanut bulge seen in Mira variables
Marcin Semczuk, Walter Dehnen, Ralph Schoenrich +1
We analyse the distribution of Mira variable stars in the central region of the Milky Way. We find that with increasing period, i.e. decreasing age, the Miras shift towards negativ…