X-ray and Radio Studies of the candidate Millisecond Pulsar Binary 4FGL J0935.3+0901

Abstract

4FGL J0935.5+0901, a $\gamma$-ray source recently identified as a candidate redback-type millisecond pulsar binary (MSP), shows an interesting feature of having double-peaked emission lines in its optical spectrum. The feature would further suggest the source as a transitional MSP system in the sub-luminous disk state. We have observed the source with \xmm\ and Five-hundred-meter Aperture Spherical radio Telescope (FAST) at X-ray and radio frequencies respectivelyfor further studies. From the X-ray observation, a bimodal count-rate distribution, which is a distinctive feature of the transitional MSP systems, is not detected, while the properties of X-ray variability and power-law spectrum are determined for the source. These results help establish the consistency of it being a redback in the radio pulsar state. However no radio pulsation signals are found in the FAST observation, resulting an upper limit on the flux density of $\sim 4\mu$Jy. Implications of these results are discussed.

10 pages, 5 figures

References in corpus (10)

• HI4PI: A full-sky HI survey based on EBHIS and GASS
• A New Electron Density Model for Estimation of Pulsar and FRB Distances
• A Radio Pulsar/X-ray Binary Link
• Optical spectroscopy and demographics of redback millisecond pulsar binaries
• X-ray states of redback millisecond pulsars
• Identification of the High-Energy Gamma-Ray Source 3FGL J1544.6-1125 as a Transitional Millisecond Pulsar Binary in an Accreting State
• Prolonged sub-luminous state of the new transitional pulsar candidate CXOU J110926.4-650224
• Discovery of a Redback Millisecond Pulsar Candidate: 3FGL J0212.1+5320
• The 26.3-hr orbit and multi-wavelength properties of the "redback" millisecond pulsar PSR J1306-40
• X-ray Activity from Different Types of Stars

Cited by in corpus (3)

• A New Flaring Black Widow Candidate and Demographics of Black Widow Millisecond Pulsars in the Galactic Field
• Optical Light Curve of 4FGL J0935.3+0901: A Flaring Black Widow Candidate
• Luminous Optical and X-ray Flaring of the Putative Redback Millisecond Pulsar 1FGL J0523.5$-$2529