AX J1749.1-2733 and AX J1749.2-2725 - the close pair of X-ray pulsars behind the Galactic Center: an optical identification - Astrophysics > High Energy Astrophysical PhenomenaReportar como inadecuado




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Abstract: Two faint X-ray pulsars, AX J1749.2-2725 and AX J1749.1-2733, located in thedirection to the Galactic Center, were studied in detail using data ofINTEGRAL, XMM-Newton and Chandra observatories in X-rays, the SOFI-NTTinstrument in infrared and the RTT150 telescope in optics. X-ray positions ofboth sources were determined with the uncertainty better than ~1 arcsec, thatallowed us to identify their infrared counterparts. From the subsequentanalysis of infrared and optical data we conclude that counterparts of bothpulsars are likely massive stars of B0-B3 classes located behind the GalacticCenter at distances of 12-20 kpc, depending on the type, probably in furtherparts of galactic spiral arms. In addition, we investigated the extinction lawtowards the galactic bulge and found that it is significantly different fromstandard one.



Autor: D.Karasev, A.Lutovinov, R.Burenin Space Research Institute, Moscow

Fuente: https://arxiv.org/







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