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arXiv · 2404.13303

Insights on the Optical and Infrared Nature of MAXI J0709-159: Implications for High-Mass X-ray Binaries

Suman Bhattacharyya·Blesson Mathew·Gourav Banerjee·Sindhu G·S. Muneer·S. Pramod Kumar·Santosh Joshi
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Abstract

In our previous study (Bhattacharyya et al., 2022), HD~54786, the optical counterpart of the MAXI J0709-159 system, was identified to be an evolved star, departing from the main sequence, based on comparisons with non-X-ray binary systems. In this paper, using color-magnitude diagram (CMD) analysis for High-Mass X-ray Binaries (HMXBs) and statistical t-tests, we found evidence supporting HD 54786's potential membership in both Be/X-ray binaries (BeXRBs) and supergaint X-ray binaries (SgXBs) populations of HMXBs. Hence, our study points towards dual optical characteristics of HD~54786, as an X-ray binary star and also belonging to a distinct evolutionary phase from BeXRB towards SgXB. Our further analysis suggests that MAXI J0709-159, associated with HD 54786, exhibits low-level activity during the current epoch and possesses a limited amount of circumstellar material. Although similarities with the previously studied BeXRB system LSI +61$^{\circ}$ 235 (Coe et al., 1994) are noted, continued monitoring and data collection are essential to fully comprehend the complexities of MAXI J0709-159 and its evolutionary trajectory within the realm of HMXBs.

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Suman Bhattacharyya, Blesson Mathew, Gourav Banerjee, Sindhu G, S. Muneer, S. Pramod Kumar, Santosh Joshi. 2024-04-20. Insights on the Optical and Infrared Nature of MAXI J0709-159: Implications for High-Mass X-ray Binaries. https://arxiv.org/abs/2404.13303

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