Spectral and temporal features in bursts from 2S 1636 - 536 observed with EXOSAT
نویسندگان
چکیده
منابع مشابه
A Characterization of the Brightness Oscillations during Thermonuclear Bursts from 4u 1636[536
The discovery of nearly coherent brightness oscillations during thermonuclear X-ray bursts from six neutron star low-mass X-ray binaries has opened up a new way to study the propagation of thermonuclear burning and may ultimately lead to greater understanding of thermonuclear propagation in other astrophysical contexts, such as in Type Ia supernovae. Here, we report detailed analyses of the D58...
متن کاملEvidence for Antipodal Hot Spots During X - ray Bursts From 4 U 1636 - 536
The discovery of high-frequency brightness oscillations in thermonuclear X-ray bursts from several neutron-star low-mass X-ray binaries has important implications for the beat frequency model of kilohertz quasi-periodic brightness oscillations, the propagation of nuclear burning, the structure of the subsurface magnetic fields in neutron stars, and the equation of state of high-density matter. ...
متن کاملEddington-limited X-ray Bursts as Distance Indicators. Ii. Possible Compositional Effects in Bursts from 4u 1636−536
We analyzed 123 thermonuclear (type-I) X-ray bursts observed by the Rossi X-ray Timing Explorer from the low-mass X-ray binary 4U 1636−536. All but two of the 40 radius-exansion bursts in this sample reached peak fluxes which were normally distributed about a mean of 6.4×10 ergs cm s, with a standard deviation of 7.6%. The remaining two radius-expansion bursts reached peak fluxes a factor of 1....
متن کاملSpectral Features from Ultrarelativistic Ions in Gamma - Ray Bursts ?
Gamma ray burst outflows may entrain small blobs or filaments of dense, highly ionized metal rich material. Such inhomogeneities, accelerated by the flow to Lorentz factors in the range 10-100, could have a significant coverage factor, and give rise to broad features, especially due to Fe K-edges, which influence the spectrum below the MeV range, leading to a progressively decreasing hardness r...
متن کاملA Non-pre Double-peaked Burst from 4u 1636–536: Evidence for Burning Front Propagation
We analyse Rossi X-ray Timing Explorer (RXTE) Proportional Counter Array (PCA) data of a double-peaked burst from the low mass X-ray binary (LMXB) 4U 1636–536 that shows no evidence for photospheric radius expansion (PRE). We find that the X-ray emitting area on the star increases with time as the burst progresses, even though the photosphere does not expand. We argue that this is a strong indi...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1984
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/208.1.29p