A planetary system around the millisecond pulsar PSR1257 + 12

Nature ◽  
1992 ◽  
Vol 355 (6356) ◽  
pp. 145-147 ◽  
Author(s):  
A. Wolszczan ◽  
D. A. Frail
Keyword(s):  
Planetary System ◽  
Millisecond Pulsar

scholarly journals Millisecond Pulsar Surveys

1996 ◽  
Vol 160 ◽  
pp. 3-10 ◽  
Author(s):  
M. Bailes
Keyword(s):  
Mass Loss ◽  
White Dwarf ◽  
Large Scale ◽  
Planetary System ◽  
Galactic Disk ◽  
Millisecond Pulsar ◽  
Millisecond Pulsars ◽  
Sky Surveys ◽  
Unique Object ◽  
Low Mass

AbstractThere are now more than 30 millisecond pulsars known to be associated with the Galactic disk. The majority of these have been discovered in just the last few years as the result of large-scale all-sky surveys. The properties of the population vary tremendously. One unique object hosts a planetary system, more than half of those discovered possess white dwarf companions, two have extremely low-mass companions that are undergoing mass-loss and several others appear to be solitary. In this review I discuss the methods employed to find these millisecond pulsars, the parallels with early surveys for “normal” pulsars, and possible strategies for future searches.

scholarly journals Planets Around Pulsars

1996 ◽  
Vol 165 ◽  
pp. 187-196 ◽  
Author(s):  
A. Wolszczan
Keyword(s):  
Planetary System ◽  
Gravitational Interaction ◽  
Planetary Systems ◽  
Millisecond Pulsar ◽  
Origin And Evolution ◽  
Planetary Dynamics ◽  
Unique Source ◽  
Extrasolar Planetary System ◽  
Source Of Information

A discovery of three terrestrial-mass planets orbiting the millisecond pulsar PSR B1257+12 and a subsequent detection of the predicted effect of gravitational interaction between the two more massive planets confirms that the first extrasolar planetary system has been identified and that pulsars can be successfully used as probes of planetary dynamics. In the absence of detections of planet-sized objects around Sun-like stars, planets orbiting a precise pulsar clock represent a unique source of information concerning the origin and evolution of planetary systems.

scholarly journals Astrometry of the Planetary-System Millisecond Pulsar B1257+12

1998 ◽  
Vol 164 ◽  
pp. 331-332 ◽  
Author(s):  
N. V. Nunes ◽  
N. Bartel
Keyword(s):  
Solar System ◽  
Reference Frame ◽  
Reference Frames ◽  
Planetary System ◽  
System Dynamic ◽  
Millisecond Pulsar ◽  
Position Determination

AbstractWe present the VLBI determined position of the millisecond pulsar PSR B1257+12 which has been shown to have a planetary system (Wolszczan & Frail 1992). The position determination for epoch June 20, 1992 is: αJ2000=13h0m3s.05005(5),δJ2000=+12°40’56″.7043(34). We indicate how the combination of such pulsar observations along with timing observations can be used to directly tie the solar-system dynamic reference frames and the extragalactic reference frame.

Annual gazetteer of planetary nomenclature, Intenationl astronomical union, working group for planetary system nomenclature

1986 ◽  
Author(s):  
Harold Masursky ◽  
Kaare Aksnes ◽  
G.E. Hunt ◽  
M.Y. Marov ◽  
P.M. Millman ◽  
...  
Keyword(s):  
Working Group ◽  
Planetary System

Drifting Through a Planetary System

2018 ◽  
Author(s):  
Karel Schrijver
Keyword(s):  
Seventeenth Century ◽  
Solar System ◽  
Virtual Worlds ◽  
Planetary System ◽  
System P ◽  
History Of ◽  
Or Team ◽  
Water Contents

This chapter describes how the first found exoplanets presented puzzles: they orbited where they should not have formed or where they could not have survived the death of their stars. The Solar System had its own puzzles to add: Mars is smaller than expected, while Venus, Earth, and Mars had more water—at least at one time—than could be understood. This chapter shows how astronomers worked through the combination of these puzzles: now we appreciate that planets can change their orbits, scatter water-bearing asteroids about, steal material from growing planets, or team up with other planets to stabilize their future. The special history of Jupiter and Saturn as a pair bringing both destruction and water to Earth emerged from the study of seventeenth-century resonant clocks, from the water contents of asteroids, and from experiments with supercomputers imposing the laws of physics on virtual worlds.

Millisecond Pulsar Alignment: PSR J0437−4715

1998 ◽  
Vol 493 (1) ◽  
pp. 397-403 ◽  
Author(s):  
Kaiyou Chen ◽  
Malvin Ruderman ◽  
Tianhua Zhu
Keyword(s):  
Millisecond Pulsar

scholarly journals Afterglow light curve modulated by a highly magnetized millisecond pulsar

2002 ◽  
Vol 381 (1) ◽  
pp. L5-L8 ◽  
Author(s):  
H.-Y. Chang ◽  
C.-H. Lee ◽  
I. Yi
Keyword(s):  
Light Curve ◽  
Millisecond Pulsar

scholarly journals DESTINY: Database for the Effects of STellar encounters on dIsks and plaNetary sYstems

2019 ◽  
Vol 6 (1) ◽  
Author(s):  
Asmita Bhandare ◽  
Susanne Pfalzner
Keyword(s):  
Planetary System ◽  
Planetary Systems ◽  
Gravitational Effect ◽  
Parameter Study ◽  
Orbital Inclination ◽  
Particle Properties ◽  
Disk Size ◽  
Stellar Group ◽  
Cluster Environment ◽  
Parabolic Orbits

Abstract Most stars form as part of a stellar group. These young stars are mostly surrounded by a disk from which potentially a planetary system might form. Both, the disk and later on the planetary system, may be affected by the cluster environment due to close fly-bys. The here presented database can be used to determine the gravitational effect of such fly-bys on non-viscous disks and planetary systems. The database contains data for fly-by scenarios spanning mass ratios between the perturber and host star from 0.3 to 50.0, periastron distances from 30 au to 1000 au, orbital inclination from 0∘ to 180∘ and angle of periastron of 0∘, 45∘ and 90∘. Thus covering a wide parameter space relevant for fly-bys in stellar clusters. The data can either be downloaded to perform one’s own diagnostics like for e.g. determining disk size, disk mass, etc. after specific encounters, obtain parameter dependencies or the different particle properties can be visualized interactively. Currently the database is restricted to fly-bys on parabolic orbits, but it will be extended to hyperbolic orbits in the future. All of the data from this extensive parameter study is now publicly available as DESTINY.

scholarly journals GJ 436b and the stellar wind interaction: simulations constraints using Lyα and Hα transits

2020 ◽  
Author(s):  
Carolina Villarreal D’Angelo ◽  
Aline A Vidotto ◽  
Alejandro Esquivel ◽  
Gopal Hazra ◽  
Allison Youngblood
Keyword(s):  
Mass Loss ◽  
Stellar Wind ◽  
Planetary System ◽  
Neutral Hydrogen ◽  
Hydrogen Atmosphere ◽  
Planetary Atmosphere ◽  
Hydrodynamic Simulations ◽  
Stellar Disc ◽  
Planetary Mass ◽  
Best Fit

Abstract The GJ 436 planetary system is an extraordinary system. The Neptune-size planet that orbits the M3 dwarf revealed in the Lyα line an extended neutral hydrogen atmosphere. This material fills a comet-like tail that obscures the stellar disc for more than 10 hours after the planetary transit. Here, we carry out a series of 3D radiation hydrodynamic simulations to model the interaction of the stellar wind with the escaping planetary atmosphere. With these models, we seek to reproduce the $\sim 56\%$ absorption found in Lyα transits, simultaneously with the lack of absorption in Hα transit. Varying the stellar wind strength and the EUV stellar luminosity, we search for a set of parameters that best fit the observational data. Based on Lyα observations, we found a stellar wind velocity at the position of the planet to be around [250-460] km s−1 with a temperature of [3 − 4] × 105 K. The stellar and planetary mass loss rates are found to be 2 × 10−15 M⊙ yr−1 and ∼[6 − 10] × 109 g s−1, respectively, for a stellar EUV luminosity of [0.8 − 1.6] × 1027 erg s−1. For the parameters explored in our simulations, none of our models present any significant absorption in the Hα line in agreement with the observations.

scholarly journals III. On the nature and construction of the sun and fixed stars

1795 ◽  
Vol 85 ◽  
pp. 46-72 ◽  
Keyword(s):  
Central Body ◽  
Planetary System ◽  
Considerable Progress ◽  
The Sun ◽  
Great Satisfaction ◽  
The Earth ◽  
The World ◽  
Celestial Bodies ◽  
The Universe ◽  
Made In

Among the celestial bodies the sun is certainly the first which should attract our notice. It is a fountain of light that illuminates the world! it is the cause of that heat which main­tains the productive power of nature, and makes the earth a fit habitation for man! it is the central body of the planetary system; and what renders a knowledge of its nature still more interesting to us is, that the numberless stars which compose the universe, appear, by the strictest analogy, to be similar bodies. Their innate light is so intense, that it reaches the eye of the observer from the remotest regions of space, and forcibly claims his notice. Now, if we are convinced that an inquiry into the nature and properties of the sun is highly worthy of our notice, we may also with great satisfaction reflect on the considerable progress that has already been made in our knowledge of this eminent body. It would require a long detail to enumerate all the various discoveries which have been made on this subject; I shall, therefore, content myself with giving only the most capital of them.

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