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Searching for Jet Emission in LMXBs: A Polarimetric View

Physics Department, New York University Abu Dhabi, PO Box 129188, Abu Dhabi, UAE
INAF, Osservatorio Astronomico di Brera, via E. Bianchi 46, 23807 Merate, Italy
Author to whom correspondence should be addressed.
Academic Editors: Emmanouil Angelakis, Markus Boettcher and Jose L. Gómez
Galaxies 2017, 5(4), 62;
Received: 25 August 2017 / Revised: 23 September 2017 / Accepted: 25 September 2017 / Published: 7 October 2017
(This article belongs to the Special Issue Polarised Emission from Astrophysical Jets)
We present results taken from a study aiming at detecting the emission from relativistic particles jets in neutron star-low mass X-ray binaries using optical polarimetric observations. First, we focus on a polarimetric study performed on the persistent LMXB 4U 0614+091. Once corrected for interstellar effects, we measured an intrinsic linear polarization in the r-band of ~3% at a 3σ confidence level. This is in-line with the observation of an infrared excess in the spectral energy distribution (SED) of the source, reported in a previous work, which the authors linked to the optically thin synchrotron emission of a jet. We then present a study performed on the transitional millisecond pulsar PSR J1023+0038 during quiescence. We measured a linear polarization of 1.09 ± 0.27% and 0.90 ± 0.17% in the V and R bands, respectively. The phase-resolved polarimetric curve of the source in the R-band reveals a hint of a sinusoidal modulation at the source orbital period. The NIR -optical SED of the system did not suggest the presence of a jet. We conclude that the optical linear polarization observed for PSR J1023+0038 is possibly due to Thomson scattering with electrons in the disc, as also suggested by the hint of the modulation of the R-band linear polarization at the system orbital period. View Full-Text
Keywords: jets; polarization; accretion disc jets; polarization; accretion disc
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MDPI and ACS Style

Baglio, M.C.; D’Avanzo, P.; Campana, S.; Russell, D.M. Searching for Jet Emission in LMXBs: A Polarimetric View. Galaxies 2017, 5, 62.

AMA Style

Baglio MC, D’Avanzo P, Campana S, Russell DM. Searching for Jet Emission in LMXBs: A Polarimetric View. Galaxies. 2017; 5(4):62.

Chicago/Turabian Style

Baglio, Maria C.; D’Avanzo, Paolo; Campana, Sergio; Russell, Dave M. 2017. "Searching for Jet Emission in LMXBs: A Polarimetric View" Galaxies 5, no. 4: 62.

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