HV 11417

HV 11417 is a candidate Thorne–Żytkow object in the Small Magellanic Cloud, put forward in a paper by Emma Beasor and collaborators. The paper also claims that another candidate for the Thorne–Żytkow object, HV 2112, was not a Thorne–Żytkow object because it seemingly lacked any distinguishing quality which would indicate that classification.^[4] It has since been reported that HV 11417 may be a foreground halo star.^[10] As of Gaia's 3rd data release the star has been measured to have a negative measured parallax suggesting a distance of more than 103,000 light-years (32,000 pc) at the 3-sigma level, and a proper motion consistent with Small Magellanic Cloud stars in its region of the galaxy.^[2]

1. ^ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Constellation record for this object at VizieR.
2. ^ ^{a b c d e f} Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
3. ^ Boyer, Martha L.; Srinivasan, Sundar; Van Loon, Jacco Th.; McDonald, Iain; Meixner, Margaret; Zaritsky, Dennis; Gordon, Karl D.; Kemper, F.; Babler, Brian; Block, Miwa; Bracker, Steve; Engelbracht, Charles W.; Hora, Joe; Indebetouw, Remy; Meade, Marilyn; Misselt, Karl; Robitaille, Thomas; Sewiło, Marta; Shiao, Bernie; Whitney, Barbara (2011). "Surveying the Agents of Galaxy Evolution in the Tidally Stripped, Low Metallicity Small Magellanic Cloud (SAGE-SMC). II. Cool Evolved Stars". The Astronomical Journal. 142 (4): 103. arXiv:1106.5026. Bibcode:2011AJ....142..103B. doi:10.1088/0004-6256/142/4/103.
4. ^ ^{a b} Beasor, Emma R.; Davies, Ben; Cabrera-Ziri, Ivan; Hurst, Georgia (2018-07-02). "A critical re-evaluation of the Thorne–Żytkow object candidate HV 2112". Monthly Notices of the Royal Astronomical Society. 479 (3): 3101–3105. arXiv:1806.07399. Bibcode:2018MNRAS.479.3101B. doi:10.1093/mnras/sty1744. S2CID 67766043.
5. ^ Elias, J. H.; Frogel, J. A.; Humphreys, R. M. (1980). "HV 11417 : A peculiar M supergiant in the Small Magellanic Cloud". The Astrophysical Journal. 242: L13. Bibcode:1980ApJ...242L..13E. doi:10.1086/183391.
6. ^ Martínez-Miravé, Pablo; Tamborra, Irene; Vigna-Gómez, Alejandro (2025). "Identifying Thorne–Żytkow Objects through Neutrinos". The Astrophysical Journal. 984 (1): L2. arXiv:2501.03330. Bibcode:2025ApJ...984L...2M. doi:10.3847/2041-8213/adc8ab.
7. ^ Patrick, L. R.; Thilker, D.; Lennon, D. J.; Bianchi, L.; Schootemeijer, A.; Dorda, R.; Langer, N.; Negueruela, I. (2022). "Red supergiant stars in binary systems. I. Identification and characterization in the small magellanic cloud from the UVIT ultraviolet imaging survey". Monthly Notices of the Royal Astronomical Society. 513 (4): 5847. arXiv:2204.11866. Bibcode:2022MNRAS.513.5847P. doi:10.1093/mnras/stac1139.
8. ^ ^{a b c} Massey, Philip; Neugent, Kathryn F.; Ekström, Sylvia; Georgy, Cyril; Meynet, Georges (2023). "The Time-averaged Mass-loss Rates of Red Supergiants as Revealed by Their Luminosity Functions in M31 and M33". The Astrophysical Journal. 942 (2): 69. arXiv:2211.14147. Bibcode:2023ApJ...942...69M. doi:10.3847/1538-4357/aca665.
9. ^ "HV 11417". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-02-15.
10. ^ O'Grady, Anna (2020). "Cool, Luminous, and Highly Variable Stars in the Magellanic Clouds from ASAS-SN: Implications for Thorne-Żytkow Objects and Super-asymptotic Giant Branch Stars". Astrophysical Journal. 901 (2) (published September 2020): 135. arXiv:2008.06563. Bibcode:2020ApJ...901..135O. doi:10.3847/1538-4357/abafad.

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