ar X iv : a st ro - p h / 99 06 14 4 v 1 8 J un 1 99 9 Bursts from internal shocks : is it really synchrotron emission ?

نویسنده

  • Annalisa Celotti
چکیده

Within the standard internal shock scenario, synchrotron emission would produce a spectrum with slope Fν ∝ ν −1/2, as immediate consequence of the cooling timescale being shorter than the integration time. This is in disagreement with the harder observed spectra, indicating that a different mechanism is responsible for the burst emission. Furthermore in this scenario pair production is expected when photons produced by inverse Compton emission are taken into account.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

ar X iv : a st ro - p h / 97 06 07 4 v 1 8 J un 1 99 7 The radioastronomical ” Time Machine ” effect and the solution of gamma ray bursts mystery

The possible low-frequency radio emission from the progenitors of gamma ray bursts can experience a delay from tens of seconds to hours on the way to the observer due to the dispersion in galactic and extragalactic plasma, and thus reach the observer as a radio afterglow of the burst. This opens a unique possibility (peculiar ”Time Machine”) of seeing what happened in that place before the cata...

متن کامل

ar X iv : a st ro - p h / 99 06 08 9 v 1 4 J un 1 99 9 The SW Sextantis stars

I review the observational properties of SW Sex stars. I show that they can be explained by an accretion stream overflowing the disc, combined with an accretion disc wind. I suggest that SW Sex behaviour is caused by episodes of very high mass transfer, which are balanced by VY Scl low states.

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 1999