ASKAP J173608.2–321635

ASKAP J173608.2–321635 is an unidentified astronomical radio source sending "radio signals … from the direction of the centre of the galaxy". It is nicknamed "Andy's Object" after its discoverer, Ziteng (Andy) Wang, of the University of Sydney in Australia.[1][2] The object was detected using the Australian Square Kilometre Array Pathfinder and MeerKAT radio telescopes. It is not visible to "the most powerful non-radio telescopes" and was detected six times between 2020 January and 2020 September.[3] This may be a new class of object because no counterpart has been detected at multiple wavelengths, which "rules out flaring stars, binary systems, NSs, GRBs, or supernovae as its source". The radio emissions have a high level of polarization, suggesting scatter as a result of a black hole.[4]

References[edit]

  1. ^ Wang, Ziteng (Andy); Kaplan, David; Murphy, Tara (November 2021). "An Unknown Polarized Transient Radio Source Towards the Galactic Centre" (PDF). The University of Sydney. Retrieved 17 March 2023.
  2. ^ Crane, Leah (12 October 2021). "Something strange is sending radio waves from the centre of the galaxy". New Scientist. Retrieved 18 March 2023.
  3. ^ Wang, Ziteng; Kaplan, David L.; Murphy, Tara; Lenc, Emil; Dai, Shi; Barr, Ewan; Dobie, Dougal; Gaensler, B. M.; Heald, George; Leung, James K.; o'Brien, Andrew; Pintaldi, Sergio; Pritchard, Joshua; Rea, Nanda; Sivakoff, Gregory R.; Stappers, B. W.; Stewart, Adam; Tremou, E.; Wang, Yuanming; Woudt, Patrick A.; Zic, Andrew (2021). "Discovery of ASKAP J173608.2–321635 as a Highly Polarized Transient Point Source with the Australian SKA Pathfinder". The Astrophysical Journal. 920 (1): 45. arXiv:2109.00652. Bibcode:2021ApJ...920...45W. doi:10.3847/1538-4357/ac2360. S2CID 237386202.
  4. ^ Beradze, Revaz; Gogberashvili, Merab; Pantskhava, Lasha (September 2021). "Reflective black holes" (PDF). Modern Physics Letters A. 36 (28). Bibcode:2021MPLA...3650200B. doi:10.1142/S021773232150200X. S2CID 239218776. Retrieved 18 March 2023.


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