Exploring MAXI J1744-294: IXPE insights into a Newly Discovered X-ray Transient
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2025
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| author | Marra, Lorenzo Mikušincová, Romana Vincentelli, Federico M. Capitanio, Fiamma Del Santo, Melania Fabiani, Sergio Mandel, Shifra Muleri, Fabio Parra, Maxime Soffitta, Paolo Tarana, Antonella Baglio, M. Cristina Bianchi, Stefano Costa, Enrico D'Aì, Antonino De Marco, Barbara Dovčiak, Michal Gianolli, Vittoria Elvezia Gnarini, Andrea Gupta, Maitrayee Ingram, Adam Mastroserio, Guglielmo Matt, Giorgio Mori, Kaya Petrucci, Pierre-Olivier Podgorný, Jakub Poutanen, Juri Steiner, James F. Svoboda, Jiří Taverna, Roberto Tombesi, Francesco Ravi, Swati Rodriguez, Jérôme Russell, Thomas D. Veledina, Alexandra Zhang, Shuo |
| author_facet | Marra, Lorenzo Mikušincová, Romana Vincentelli, Federico M. Capitanio, Fiamma Del Santo, Melania Fabiani, Sergio Mandel, Shifra Muleri, Fabio Parra, Maxime Soffitta, Paolo Tarana, Antonella Baglio, M. Cristina Bianchi, Stefano Costa, Enrico D'Aì, Antonino De Marco, Barbara Dovčiak, Michal Gianolli, Vittoria Elvezia Gnarini, Andrea Gupta, Maitrayee Ingram, Adam Mastroserio, Guglielmo Matt, Giorgio Mori, Kaya Petrucci, Pierre-Olivier Podgorný, Jakub Poutanen, Juri Steiner, James F. Svoboda, Jiří Taverna, Roberto Tombesi, Francesco Ravi, Swati Rodriguez, Jérôme Russell, Thomas D. Veledina, Alexandra Zhang, Shuo |
| contents | 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$150 ks observation, the source was found in the soft state, and its spectrum was well described by an absorbed multicolor disk with a minor high-energy tail. No significant polarization was detected, and we derived a 3$σ$ 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_17050 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Exploring MAXI J1744-294: IXPE insights into a Newly Discovered X-ray Transient Marra, Lorenzo Mikušincová, Romana Vincentelli, Federico M. Capitanio, Fiamma Del Santo, Melania Fabiani, Sergio Mandel, Shifra Muleri, Fabio Parra, Maxime Soffitta, Paolo Tarana, Antonella Baglio, M. Cristina Bianchi, Stefano Costa, Enrico D'Aì, Antonino De Marco, Barbara Dovčiak, Michal Gianolli, Vittoria Elvezia Gnarini, Andrea Gupta, Maitrayee Ingram, Adam Mastroserio, Guglielmo Matt, Giorgio Mori, Kaya Petrucci, Pierre-Olivier Podgorný, Jakub Poutanen, Juri Steiner, James F. Svoboda, Jiří Taverna, Roberto Tombesi, Francesco Ravi, Swati Rodriguez, Jérôme Russell, Thomas D. Veledina, Alexandra Zhang, Shuo High Energy Astrophysical Phenomena 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$150 ks observation, the source was found in the soft state, and its spectrum was well described by an absorbed multicolor disk with a minor high-energy tail. No significant polarization was detected, and we derived a 3$σ$ 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. |
| title | Exploring MAXI J1744-294: IXPE insights into a Newly Discovered X-ray Transient |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2506.17050 |