| Issue |
A&A
Volume 463, Number 1, February III 2007
|
|
|---|---|---|
| Page(s) | 289 - 295 | |
| Section | Stellar structure and evolution | |
| DOI | https://doi.org/10.1051/0004-6361:20065862 | |
| Published online | 21 November 2006 | |
Chandra observation of the Big Dipper X 1624–490
Dipartimento di Scienze Fisiche ed Astronomiche, Università di Palermo, via Archirafi 36, 90123 Palermo, Italy e-mail: iaria@fisica.unipa.it
Received:
20
June
2006
Accepted:
13
November
2006
We present the results of a 73 ks long Chandra observation
of the dipping source X 1624–490. During the observation a complex
dip lasting 4 h is observed. We analyse the persistent emission
detecting, for the first time in the 1st-order spectra of X 1624–490, an absorption line associated to 
. We confirm
the presence of the 
Kα and 
Kα absorption lines with a larger accuracy with respect to a
previous XMM observation. Assuming that the line widths are due to
a bulk motion or a turbulence associated to the coronal activity, we
estimate that the lines have been produced in a photoionized
absorber between the coronal radius and the outer edge of the
accretion disk.
Key words: accretion, accretion disks / stars: individual: X 1624–490 / stars: neutron / X-rays: stars / X-rays: binaries / X-rays: general
© ESO, 2007
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