DISCOVERY OF AN ULTRACOMPACT GAMMA-RAY MILLISECOND PULSAR BINARY CANDIDATE
Abstract
We report multi-wavelength observations of the unidentified Fermi object 2FGL J1653.6-0159. With the help of high-resolution X-ray observations, we have identified an X-ray and optical counterpart to 2FGL J1653.6-0159. The source exhibits a periodic modulation of 75 minutes in the optical and possibly also in the X-ray. We suggest that 2FGL J1653.6-0159 is a compact binary system with an orbital period of 75 minutes. Combining the gamma-ray and X-ray properties, 2FGL J1653.6-0159 is potentially a black-widow-/redback-type gamma-ray millisecond pulsar (MSP). The optical and X-ray light curve profiles show that the companion is mildly heated by the high-energy emission and that the X-rays are from intrabinary shock. Although no radio pulsation has yet been detected, we estimated that the spin period of the MSP is ∼ 2 ms based on a theoretical model. If pulsation can be confirmed in the future, 2FGL J1653.6-0159 will become the first ultracompact rotation-powered MSP.
- Authors:
-
- Institute of Astronomy and Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan (China)
- Graduate Institute of Astronomy, National Central University, Jhongli 32001, Taiwan (China)
- Department of Astronomy and Space Science, Chungnam National University, Daejeon (Korea, Republic of)
- Department of Physics, University of Hong Kong, Pokfulam Road (Hong Kong)
- Publication Date:
- OSTI Identifier:
- 22364592
- Resource Type:
- Journal Article
- Journal Name:
- Astrophysical Journal Letters
- Additional Journal Information:
- Journal Volume: 794; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 2041-8205
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COSMIC X-RAY SOURCES; DIAGRAMS; GAMMA RADIATION; MODULATION; PERIODICITY; POTENTIALS; PULSARS; PULSATIONS; RESOLUTION; ROTATION; SPIN; STARS; VISIBLE RADIATION; X RADIATION
Citation Formats
Kong, Albert K. H., Jin, Ruolan, Yen, T. -C., Tam, P. H. T., Lin, L. C. C., Hu, C. -P., Hui, C. Y., Park, S. M., Takata, J., Cheng, K. S., and Kim, C. L., E-mail: akong@phys.nthu.edu.tw. DISCOVERY OF AN ULTRACOMPACT GAMMA-RAY MILLISECOND PULSAR BINARY CANDIDATE. United States: N. p., 2014.
Web. doi:10.1088/2041-8205/794/2/L22.
Kong, Albert K. H., Jin, Ruolan, Yen, T. -C., Tam, P. H. T., Lin, L. C. C., Hu, C. -P., Hui, C. Y., Park, S. M., Takata, J., Cheng, K. S., & Kim, C. L., E-mail: akong@phys.nthu.edu.tw. DISCOVERY OF AN ULTRACOMPACT GAMMA-RAY MILLISECOND PULSAR BINARY CANDIDATE. United States. https://doi.org/10.1088/2041-8205/794/2/L22
Kong, Albert K. H., Jin, Ruolan, Yen, T. -C., Tam, P. H. T., Lin, L. C. C., Hu, C. -P., Hui, C. Y., Park, S. M., Takata, J., Cheng, K. S., and Kim, C. L., E-mail: akong@phys.nthu.edu.tw. 2014.
"DISCOVERY OF AN ULTRACOMPACT GAMMA-RAY MILLISECOND PULSAR BINARY CANDIDATE". United States. https://doi.org/10.1088/2041-8205/794/2/L22.
@article{osti_22364592,
title = {DISCOVERY OF AN ULTRACOMPACT GAMMA-RAY MILLISECOND PULSAR BINARY CANDIDATE},
author = {Kong, Albert K. H. and Jin, Ruolan and Yen, T. -C. and Tam, P. H. T. and Lin, L. C. C. and Hu, C. -P. and Hui, C. Y. and Park, S. M. and Takata, J. and Cheng, K. S. and Kim, C. L., E-mail: akong@phys.nthu.edu.tw},
abstractNote = {We report multi-wavelength observations of the unidentified Fermi object 2FGL J1653.6-0159. With the help of high-resolution X-ray observations, we have identified an X-ray and optical counterpart to 2FGL J1653.6-0159. The source exhibits a periodic modulation of 75 minutes in the optical and possibly also in the X-ray. We suggest that 2FGL J1653.6-0159 is a compact binary system with an orbital period of 75 minutes. Combining the gamma-ray and X-ray properties, 2FGL J1653.6-0159 is potentially a black-widow-/redback-type gamma-ray millisecond pulsar (MSP). The optical and X-ray light curve profiles show that the companion is mildly heated by the high-energy emission and that the X-rays are from intrabinary shock. Although no radio pulsation has yet been detected, we estimated that the spin period of the MSP is ∼ 2 ms based on a theoretical model. If pulsation can be confirmed in the future, 2FGL J1653.6-0159 will become the first ultracompact rotation-powered MSP.},
doi = {10.1088/2041-8205/794/2/L22},
url = {https://www.osti.gov/biblio/22364592},
journal = {Astrophysical Journal Letters},
issn = {2041-8205},
number = 2,
volume = 794,
place = {United States},
year = {Mon Oct 20 00:00:00 EDT 2014},
month = {Mon Oct 20 00:00:00 EDT 2014}
}