Luminosity of a quark star undergoing torsional oscillations and the problem of gamma ray bursts

Astronomy and Astrophysics – Astrophysics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

16 pages, accepted by Astronomy and Astrophysics

Scientific paper

10.1051/0004-6361/20079095

We discuss whether the winding-up of the magnetic field by differential rotation in a new-born quark star can produce a sufficiently-high, energy, emission rate of sufficiently long duration to explain long gamma-ray bursts. In the context of magnetohydrodynamics, we study the torsional oscillations and energy extraction from a new-born, hot, differentially rotating quark star. The new-born compact star is a rapid rotator that produces a relativistic, leptonic wind. The star's torsional oscillation modulates this wind emission considerably when it is odd and of sufficient amplitude, which is relatively easy to reach. Odd oscillations may occur just after the formation of a quark star. Other asymmetries can cause similar effects. The buoyancy of wound-up magnetic fields is inhibited, or its effects are limited, by a variety of different mechanisms. Direct electromagnetic emission by the torsional oscillation in either an outside vacuum or the leptonic wind surrounding the compact object is found to be insignificant. In contrast, the twist given to the outer magnetic field by an odd torsional oscillation is generally sufficient to open the star's magnetosphere. The Poynting emission of the star in its leptonic environment is then radiated from all of its surface and is enhanced considerably during these open episodes, tapping at the bulk rotational energy of the star. This results in intense energy shedding in the first tens of minutes after the collapse of magnetized quark stars with an initial poloidal field of order of 10**14 Gauss, sufficient to explain long gamma-ray bursts.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Luminosity of a quark star undergoing torsional oscillations and the problem of gamma ray bursts does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Luminosity of a quark star undergoing torsional oscillations and the problem of gamma ray bursts, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Luminosity of a quark star undergoing torsional oscillations and the problem of gamma ray bursts will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-228594

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.