5 papers
Kinematics and physical structure of Ou 5: A bipolar planetary nebula with extreme abundance discrepancy and an eclipsing binary core
William J. Henney, J. A. López, Ma. T. GarcÃa-DÃaz +5
We present new deep imaging and high-resolution spectroscopy of the extreme-abundance-discrepancy planetary nebula Ou 5, together with photoionization modelling aimed at probing it…
Studying the black widow pulsars PSR J03120921 and PSR J16273219 in the optical and X-rays
A. V. Bobakov, A. Kirichenko, S. V. Zharikov +4
Context. PSR J03120921 and PSR J16273219 are black widow pulsars with orbital periods of 2.34 and 3.98 hours. They were recently detected in the radio and -rays. Aims. Ou…
MASTER OT J072007.30+451611.6: A Polar with Strong Optical Variability and Suppressed He II Emission
A. V. Bobakov, S. V. Zharikov, A. V. Karpova +8
The transient optical source MASTER OT J072007.30+451611.6 has been recently discovered and proposed as a peculiar polar with an unusually high amplitude of the orbital brightness…
4FGL J1544.22554: a new spider pulsar candidate
A. V. Karpova, S. V. Zharikov, D. A. Zyuzin +3
Context. Spider pulsars are millisecond pulsars in tight binary systems, in which a low-mass companion star is heated and ablated by the pulsar wind. Their observations allow one t…
Two black widow pulsars in the optical and X-rays
A. V. Bobakov, A. Yu. Kirichenko, S. V. Zharikov +5
Context. Two millisecond pulsars, PSR J15132550 and PSR J20171614, with spin periods of about 2.1 and 2.3 ms were recently discovered in the radio and -rays and classifie…