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arxiv: 2506.17050 · v1 · pith:JEOLFBDYnew · submitted 2025-06-20 · 🌌 astro-ph.HE

Exploring MAXI J1744-294: IXPE insights into a Newly Discovered X-ray Transient

classification 🌌 astro-ph.HE
keywords diskblackholepolarizationcircdegreediscoveredduring
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We present the first IXPE spectro-polarimetric observation of the black hole candidate MAXI J1744$-$294, a transient X-ray source discovered during a bright 2025 outburst in the Galactic center region. During the $\sim$150 ks observation, the source was found in the soft state, and its spectrum was well described by an absorbed multicolor disk with a minor high-energy tail. No significant polarization was detected, and we derived a 3$\sigma$ upper limit on the polarization degree of $1.3\%$ in the 2--8 keV energy band. This result is consistent with previous findings for soft-state black hole binaries observed at low to intermediate inclination angles. By comparing the polarization degree upper limit with theoretical predictions for standard accretion disk emission, we constrain the disk inclination to $i \lesssim 38^\circ$--$71^\circ$, depending on the black hole spin and the disk atmosphere albedo.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Detection and Evolution of Linear Polarization of the Galactic Center Transient MAXI J1744-294

    astro-ph.HE 2026-04 conditional novelty 7.0

    First polarization measurements of MAXI J1744-294 reveal a common Faraday screen with RM = -63606 rad m^{-2} matching the Galactic center magnetar, confirming the transient's location in the nuclear star cluster and s...

  2. Constraining the Galactic Center Dark Cluster with ELT/MICADO Observations

    astro-ph.GA 2026-05 unverdicted novelty 4.0

    ELT/MICADO is projected to enable the first quantitative constraints on the dark cluster of stellar compact objects in the Galactic Center through variability and astrometric searches.