* Astronomy

Blobrana · L

RE: IGR J11014-6103

Blobrana · L

Runaway Pulsar Firing an Extraordinary Jet

An extraordinary jet trailing behind a runaway pulsar is seen in this composite image that contains data from NASA's Chandra X-ray Observatory (purple), radio data from the Australia Compact Telescope Array (green), and optical data from the 2MASS survey (red, green, and blue). The pulsar - a spinning neutron star - and its tail are found in the lower right of this image (mouse over the image for a labeled version). The tail stretches for 37 light years , making it the longest jet ever seen from an object in the Milky Way galaxy, as described in our press release.
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Blobrana · L

IGR J11014-6103: Has the Speediest Pulsar Been Found?

Researchers using three different telescopes -- NASA's Chandra X-ray Observatory and ESA's XMM-Newton in space, and the Parkes radio telescope in Australia -- may have found the fastest moving pulsar ever seen.
The evidence for this potentially record-breaking speed comes, in part, from the features highlighted in this composite image. X-ray observations from Chandra (green) and XMM-Newton (purple) have been combined with infrared data from the 2MASS project and optical data from the Digitised Sky Survey (coloured red, green and blue, but appearing in the image as white).
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Blobrana · L

Title: Is IGR J11014-6103 a Pulsar with the Highest Known Kick Velocity?
Authors: John A. Tomsick (SSL/UC Berkeley), Arash Bodaghee (SSL/UC Berkeley), Jerome Rodriguez (AIM - Univ. Paris VII and CEA Saclay), Sylvain Chaty (AIM - Univ. Paris VII and CEA Saclay), Fernando Camilo (Columbia University), Francesca Fornasini (UC Berkeley), Farid Rahoui (Harvard University and CfA)

We report the results of the first X-ray observation of the luminous and helium-rich O-type subdwarf BD+37 442, carried out with the XMM-Newton satellite in August 2011. X-ray emission is detected with a flux of about 3x10^(-14) erg/cm²/s (0.2-1 keV) and a very soft spectrum, well fit by the sum of a blackbody with temperature kT_BB = 45^(+11)_(-9) eV and a power law with a poorly constrained photon index. Significant pulsations with a period of 19.2 s are detected, indicating that the X-ray emission originates in a white dwarf or neutron star companion, most likely powered by accretion from the wind of BD+37 442.

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Blobrana · L

Title: IGR J11014-6103: a newly discovered pulsar wind nebula?
Authors: L. Pavan, E. Bozzo, G. Pühlhofer, C. Ferrigno, M. Balbo, R. Walter

Context: IGRJ11014-6103 is one of the still unidentified hard X-ray INTEGRAL sources, reported for the first time in the 4th IBIS/ISGRI catalogue.
Aims: We investigated the nature of IGR J11014-6103 by carrying out a multiwavelength analysis of the available archival observations performed in the direction of the source.
Methods: We present first the results of the timing and spectral analysis of all the X-ray observations of IGR J11014-6103 carried out with ROSAT, ASCA, Einstein, Swift, and XMM-Newton, and then use them to search for possible counterparts to the source in the optical, infra-red, radio and gamma-ray domain. Results: Our analysis revealed that IGR J11014-6103 is comprised of three different X-ray emitting regions: a point-like source, an extended object and a cometary-like "tail" (~4 arcmin). A possible radio counterpart positionally coincident with the source was also identified.
Conclusions: Based on these results, we suggest that the emission from IGR J11014-6103 is generated by a pulsar wind nebula produced by a high-velocity pulsar. IGR J11014-6103 might be the first of these systems detected with INTEGRAL IBIS/ISGRI.

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