Prominences are intriguing, but poorly understood, magnetic structures of the solar corona. The dynamics of solar prominences has been the subject of a large...
Prominence Thread Seismology Using the P 1/2P 2 Ratio
Prominence threads are expected to be cold plasma condensations in a long magnetic tube. Because of this density inhomogeneity along the magnetic field, the...
Prompt and Follow-up Multi-wavelength Observations of the GRB 161017A
This paper presents data on the simultaneous and complementary observations of the gamma-ray burst (GRB) GRB 161017A for optical, X-ray, and gamma wavelengths...
Propagating Waves Transverse to the Magnetic Field in a Solar Prominence
We report an unusual set of observations of waves in a large prominence pillar that consist of pulses propagating perpendicular to the prominence magnetic field...
Propagation of ionizing radiation in H II regions: The effects of optically thick density fluctuations
The accepted explanation of the observed dichotomy of two orders of magnitude between in situ measurements of electron density in H II regions, derived from...
Proper motion and apparent contraction in J0650+6001
We present a multi-epoch and multifrequency very long baseline interferometry (VLBI) study of the compact radio source J0650+6001. In VLBI images, the source is...
Proper motion L and T dwarf candidate members of the Pleiades
We present the results of a deep optical-near-infrared (optical-NIR) multi-epoch survey covering 2.5 deg2 of the Pleiades open star cluster to search for new...
Proper motions and velocity asymmetries in the RW Aur jet
We present adaptive optics spectro-imaging observations of the RW Aur jet in optical forbidden lines, at an angular resolution of 0.4''. Comparison with HST...
Proper motions of cool and ultracool candidate members in the Upper Scorpius OB association
Aims: Proper motion measurements of the cool and ultracool populations in the Upper Scorpius OB association are crucial to confirm membership and to identify...