Radio-interferometric and near-IR observations of PSR J1357—6429

18th International Conference PhysicA.SPb

Kirichenko, Aida^1 ; Zyuzin, Dmitry^1 ; Shibanov, Yury^1,2 ; Shternin, Peter^1 ; Danilenko, Andrey^1 ; Zharikov, Sergey^3 ; Voronkov, Maxim^4 ; Barsukov, Dmitry^1,2 ; Mennickent, Ronald^5

Ioffe Institute, 26 Politekhnicheskaya st., St.-Petersburg

194021, Russia^1

Peter the Great St. Petersburg Polytechnic University, 29 Politekhnicheskaya st., St.-Petersburg

195251, Russia^2

Observatorio Astronómico Nacional SPM, Instituto de Astronomía, Universidad Nacional Autónoma de Mexico, Ensenada, BC, Mexico^3

CSIRO Astronomy and Space Science, Australia Telescope National Facility, PO Box 76, Epping

NSW

1710, Australia^4

Department of Astronomy, Universidad de Concepcion, Casilla 160-C, Concepcion, Chile^5

关键词: High spatial resolution;    Long wavelength;    Near-infrared imaging;    Point sources;    Proper motion;    Radio pulsars;    Transverse velocity;    X ray spectrum;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/769/1/012004/pdf
DOI  :  10.1088/1742-6596/769/1/012004

来源: IOP

【 摘 要 】

PSR J1357 - 6429 is a young radio pulsar detected in X-rays and γ-rays. We performed radio-interferometric and high spatial resolution near-infrared observations of the pulsar. Based on the obtained radio data, we estimated the most accurate pulsar position, RA = 13:57:02.525(14) and Dec = 64:29:29.89(15). Using the new and archival radio data, we obtained the 90 per cent pulsar proper motion upper limit μ -1, which corresponds to the pulsar transverse velocity vtr-1. The near-infrared imaging revealed a point source which we propose as a pulsar near-infrared counterpart candidate. It is confidently detected in the J and Ksbands, with J = 23.510.24 and Ks= 21.820.25. The respective dereddened near-infrared fluxes are compatible with the long-wavelength extrapolation of the pulsar X-ray spectrum. If the candidate is the true counterpart, by this property PSR J1357 - 6429 would be similar to the nearby middle-age pulsar PSR B0656+14. In this case, both pulsars demonstrate an unusually high near-infrared efficiency relative to the X-ray efficiency as compared to other pulsars detected in both ranges.