English
Related papers

Related papers: How fast could a proto-pulsar rotate?

200 papers

(Edited) Many fast rotator stars (rotation periods of < 2 days) are found in unresolved binaries with separations of tens of au. This correlation leads to the question of whether the formation of binary stars inherently produces fast…

Solar and Stellar Astrophysics · Physics 2024-10-16 Rajika L. Kuruwita , Christoph Federrath , Marina Kounkel

We are using the LOw-Frequency ARray (LOFAR) to perform the LOFAR Tied-Array All-Sky (LOTAAS) survey for pulsars and fast transients. Here we present the astrometric and rotational parameters of 20 pulsars discovered as part of LOTAAS.…

The alignment of Saturn's magnetic pole with its rotation axis precludes the use of magnetic field measurements to determine its rotation period. The period was previously determined from radio measurements by the Voyager spacecraft to be…

Earth and Planetary Astrophysics · Physics 2015-06-24 Ravit Helled , Eli Galanti , Yohai Kaspi

We present and analyse a catalogue of 233 pulsars with proper motion measurements. The sample contains a wide variety of pulsars including recycled objects and those associated with globular clusters or supernova remnants. After taking the…

Astrophysics · Physics 2011-05-05 G. Hobbs , D. R. Lorimer , A. G. Lyne , M. Kramer

Radial velocity observations of K giants have revealed periodic variations for some of the stars. The periods range from approximately 180 to 1000 or more days with velocity amplitudes ranging from approximately 50 m/s to 500 m/s. Except…

Astrophysics · Physics 2007-05-23 Saskia Hekker , Sabine Reffert , Andreas Quirrenbach

This paper uses an inductive method to investigate the factors responsible for variations in planetary-rotation periods. I began by showing the presence of a correlation between the masses of planets and their rotation periods. Then I…

Solar and Stellar Astrophysics · Physics 2011-06-16 Gizachew Tiruneh

We have detected the rare phenomenon of stable, drifting sub-pulse behaviour in two pulsars discovered in the recent Swinburne intermediate latitude pulsar survey. The pulsars; PSR J1231-47 and PSR J1919+0134, have approximate periods (P)…

Astrophysics · Physics 2009-11-07 S. M. Ord , R. Edwards , M. Bailes

While brown dwarfs show similarities with stars in their early life, their spin evolution is much more akin to that of planets. We have used lightcurves from the K2 mission to measure new rotation periods for 18 young brown dwarfs in the…

Earth and Planetary Astrophysics · Physics 2018-06-27 Aleks Scholz , Keavin Moore , Ray Jayawardhana , Suzanne Aigrain , Dawn Peterson , Beate Stelzer

We model long-term magneto-rotational evolution of isolated neutron stars with long initial spin periods. This analysis is motivated by the recent discovery of young long-period neutron stars observed as periodic radio sources: PSR…

High Energy Astrophysical Phenomena · Physics 2024-01-22 M. D. Afonina , A. V. Biryukov , S. B. Popov

Several mechanisms based on neutrino oscillations can explain the observed motions of pulsars if the magnetic field in their interiors is of order 10^{14}-10^{15} G.

Astrophysics · Physics 2007-05-23 Alexander Kusenko

Neutron stars are thought to be born rapidly rotating and then exhibit a phase of a rotation-powered pulsations as they slow down to 1-10 s periods. The significant population of millisecond pulsars observed in our Galaxy is explained by…

High Energy Astrophysical Phenomena · Physics 2017-05-03 Ivan Zolotukhin , Matteo Bachetti , Nicola Sartore , Igor Chilingarian , Natalie A. Webb

Pulsars are rapidly rotating neutron stars that emit pulses of radiation at regular intervals, typically ranging from milliseconds to seconds. The precise recording and modelling of the arrival times of pulsar emission is known as timing…

High Energy Astrophysical Phenomena · Physics 2025-12-03 Thulo Letsele , Mechiel Christiaan Bezuidenhout , the MeerTRAP collaboration

It has been suggested that the observed rotation periods of radio pulsars might be induced by a non-axisymmetric spiral-mode instability in the turbulent region behind the stalled supernova bounce shock, even if the progenitor core was not…

High Energy Astrophysical Phenomena · Physics 2015-05-20 E. Rantsiou , A. Burrows , J. Nordhaus , A. Almgren

We investigate the problem of the typical rotation states of the small planetary satellites from the viewpoint of the dynamical stability of their rotation. We show that the majority of the discovered satellites with unknown rotation…

Earth and Planetary Astrophysics · Physics 2015-05-13 Alexander V. Melnikov , Ivan I. Shevchenko

Although the first millisecond pulsars (MSPs) were discovered 30 years ago we still do not understand all details of their formation process. Here, we present new results from Tauris, Langer & Kramer (2012) on the recycling scenario leading…

High Energy Astrophysical Phenomena · Physics 2015-06-11 T. M. Tauris , M. Kramer , N. Langer

Pulsars are stars that emit electromagnetic radiation in well-defined time intervals. The frequency of such pulses decays with time as is quantified by the {\it braking index} ($n$). In the canonical model $n = 3$ for all pulsars, but…

High Energy Astrophysical Phenomena · Physics 2018-11-28 H. O. Oliveira , N. S. Magalhaes , R. M. Marinho , G. A. Carvalho , C. Frajuca

We present results of more than three decades of timing measurements of the first known binary pulsar, PSR B1913+16. Like most other pulsars, its rotational behavior over such long time scales is significantly affected by small-scale…

Astrophysics of Galaxies · Physics 2011-06-08 Joel M. Weisberg , David J. Nice , Joseph H. Taylor

We present rotation period measurements for 41 field M-dwarfs, all of which have masses inferred (from their parallaxes and 2MASS K-band magnitudes) to be between the hydrogen burning limit and 0.35 Msol, and thus should remain…

We analyze the cosmological simulations performed in the recent work of Greif et al. (2012), which followed the early growth and merger history of Pop III stars while resolving scales as small as 0.05 R_sol. This is the first set of…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-11 A. Stacy , T. H. Greif , R. S. Klessen , V. Bromm , A. Loeb

The 6.7 GHz methanol maser emission, a tracer of forming massive stars, sometimes shows enigmatic periodic flux variations over several 10-100 days. In this Letter, we propose that this periodic variations could be explained by the…

Solar and Stellar Astrophysics · Physics 2015-06-15 Kohei Inayoshi , Koichiro Sugiyama , Takashi Hosokawa , Kazuhito Motogi , Kei E. I. Tanaka