{"extern":"1","_id":"15194","main_file_link":[{"open_access":"1","url":"https://doi.org/10.3847/1538-4357/ace698"}],"date_published":"2023-08-23T00:00:00Z","oa":1,"doi":"10.3847/1538-4357/ace698","quality_controlled":"1","publisher":"American Astronomical Society","tmp":{"image":"/images/cc_by.png","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","short":"CC BY (4.0)","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"month":"08","date_created":"2024-03-26T09:46:30Z","status":"public","abstract":[{"lang":"eng","text":"AM Canum Venaticorum (AM CVn) systems are ultracompact binaries where a white dwarf accretes from a helium-rich degenerate or semidegenerate donor. Some AM CVn systems will be among the loudest sources of gravitational waves for the upcoming Laser Interferometer Space Antenna; yet the formation channel of AM CVns remains uncertain. We report the study and characterization of a new eclipsing AM CVn, SRGeJ045359.9+622444 (hereafter, SRGeJ0453), discovered from a joint Spektrum-Roentgen-Gamma (SRG) Extended Roentgen Survey with an Imaging Telescope Array (eROSITA) mission and Zwicky Transient Facility program to identify cataclysmic variables (CVs). We obtained optical photometry to confirm the eclipse of SRGeJ0453 and determine the orbital period to be \r\n. We constrain the binary parameters by modeling the high-speed photometry and radial-velocity curves and find Mdonor = 0.044 ± 0.024M⊙ and Rdonor = 0.078 ± 0.012R⊙. The X-ray spectrum is approximated by a power-law model with an unusually flat photon index of Γ ∼ 1 previously seen in magnetic CVs with SRG/eROSITA, but verifying that the magnetic nature of SRGeJ0453 requires further investigation. Optical spectroscopy suggests that the donor star of SRGeJ0453 could have initially been a He star or a He white dwarf. SRGeJ0453 is the ninth eclipsing AM CVn system published to date, and its lack of optical outbursts have made it elusive in previous surveys. The discovery of SRGeJ0453 using joint X-ray and optical surveys highlights the potential for discovering similar systems in the near future."}],"article_number":"63","oa_version":"Published Version","publication_identifier":{"eissn":["1538-4357"],"issn":["0004-637X"]},"type":"journal_article","keyword":["Space and Planetary Science","Astronomy and Astrophysics"],"intvolume":"       954","author":[{"first_name":"Antonio C.","full_name":"Rodriguez, Antonio C.","last_name":"Rodriguez"},{"first_name":"Ilkham","last_name":"Galiullin","full_name":"Galiullin, Ilkham"},{"last_name":"Gilfanov","full_name":"Gilfanov, Marat","first_name":"Marat"},{"last_name":"Kulkarni","full_name":"Kulkarni, Shrinivas R.","first_name":"Shrinivas R."},{"full_name":"Khamitov, Irek","last_name":"Khamitov","first_name":"Irek"},{"full_name":"Bikmaev, Ilfan","last_name":"Bikmaev","first_name":"Ilfan"},{"first_name":"Jan","full_name":"van Roestel, Jan","last_name":"van Roestel"},{"first_name":"Lev","full_name":"Yungelson, Lev","last_name":"Yungelson"},{"first_name":"Kareem","full_name":"El-Badry, Kareem","last_name":"El-Badry"},{"full_name":"Sunayev, Rashid","last_name":"Sunayev","first_name":"Rashid"},{"full_name":"Prince, Thomas A.","last_name":"Prince","first_name":"Thomas A."},{"first_name":"Mikhail","full_name":"Buntov, Mikhail","last_name":"Buntov"},{"full_name":"Caiazzo, Ilaria","last_name":"Caiazzo","orcid":"0000-0002-4770-5388","first_name":"Ilaria","id":"8ae5b6e7-2a03-11ee-914d-b58ed7a3b47d"},{"full_name":"Drake, Andrew","last_name":"Drake","first_name":"Andrew"},{"full_name":"Gorbachev, Mark","last_name":"Gorbachev","first_name":"Mark"},{"first_name":"Matthew J.","last_name":"Graham","full_name":"Graham, Matthew J."},{"full_name":"Gumerov, Rustam","last_name":"Gumerov","first_name":"Rustam"},{"last_name":"Irtuganov","full_name":"Irtuganov, Eldar","first_name":"Eldar"},{"full_name":"Laher, Russ R.","last_name":"Laher","first_name":"Russ R."},{"first_name":"Frank J.","last_name":"Masci","full_name":"Masci, Frank J."},{"first_name":"Pavel","last_name":"Medvedev","full_name":"Medvedev, Pavel"},{"last_name":"Purdum","full_name":"Purdum, Josiah","first_name":"Josiah"},{"last_name":"Sakhibullin","full_name":"Sakhibullin, Nail","first_name":"Nail"},{"last_name":"Sklyanov","full_name":"Sklyanov, Alexander","first_name":"Alexander"},{"first_name":"Roger","last_name":"Smith","full_name":"Smith, Roger"},{"first_name":"Paula","full_name":"Szkody, Paula","last_name":"Szkody"},{"full_name":"Vanderbosch, Zachary P.","last_name":"Vanderbosch","first_name":"Zachary P."}],"citation":{"short":"A.C. Rodriguez, I. Galiullin, M. Gilfanov, S.R. Kulkarni, I. Khamitov, I. Bikmaev, J. van Roestel, L. Yungelson, K. El-Badry, R. Sunayev, T.A. Prince, M. Buntov, I. Caiazzo, A. Drake, M. Gorbachev, M.J. Graham, R. Gumerov, E. Irtuganov, R.R. Laher, F.J. Masci, P. Medvedev, J. Purdum, N. Sakhibullin, A. Sklyanov, R. Smith, P. Szkody, Z.P. Vanderbosch, The Astrophysical Journal 954 (2023).","apa":"Rodriguez, A. C., Galiullin, I., Gilfanov, M., Kulkarni, S. R., Khamitov, I., Bikmaev, I., … Vanderbosch, Z. P. (2023). SRGeJ045359.9+622444: A 55 minute period eclipsing AM Canum Venaticorum star discovered from a joint SRG/eROSITA + ZTF search. <i>The Astrophysical Journal</i>. American Astronomical Society. <a href=\"https://doi.org/10.3847/1538-4357/ace698\">https://doi.org/10.3847/1538-4357/ace698</a>","ama":"Rodriguez AC, Galiullin I, Gilfanov M, et al. SRGeJ045359.9+622444: A 55 minute period eclipsing AM Canum Venaticorum star discovered from a joint SRG/eROSITA + ZTF search. <i>The Astrophysical Journal</i>. 2023;954(1). doi:<a href=\"https://doi.org/10.3847/1538-4357/ace698\">10.3847/1538-4357/ace698</a>","chicago":"Rodriguez, Antonio C., Ilkham Galiullin, Marat Gilfanov, Shrinivas R. Kulkarni, Irek Khamitov, Ilfan Bikmaev, Jan van Roestel, et al. “SRGeJ045359.9+622444: A 55 Minute Period Eclipsing AM Canum Venaticorum Star Discovered from a Joint SRG/EROSITA + ZTF Search.” <i>The Astrophysical Journal</i>. American Astronomical Society, 2023. <a href=\"https://doi.org/10.3847/1538-4357/ace698\">https://doi.org/10.3847/1538-4357/ace698</a>.","mla":"Rodriguez, Antonio C., et al. “SRGeJ045359.9+622444: A 55 Minute Period Eclipsing AM Canum Venaticorum Star Discovered from a Joint SRG/EROSITA + ZTF Search.” <i>The Astrophysical Journal</i>, vol. 954, no. 1, 63, American Astronomical Society, 2023, doi:<a href=\"https://doi.org/10.3847/1538-4357/ace698\">10.3847/1538-4357/ace698</a>.","ieee":"A. C. Rodriguez <i>et al.</i>, “SRGeJ045359.9+622444: A 55 minute period eclipsing AM Canum Venaticorum star discovered from a joint SRG/eROSITA + ZTF search,” <i>The Astrophysical Journal</i>, vol. 954, no. 1. American Astronomical Society, 2023.","ista":"Rodriguez AC, Galiullin I, Gilfanov M, Kulkarni SR, Khamitov I, Bikmaev I, van Roestel J, Yungelson L, El-Badry K, Sunayev R, Prince TA, Buntov M, Caiazzo I, Drake A, Gorbachev M, Graham MJ, Gumerov R, Irtuganov E, Laher RR, Masci FJ, Medvedev P, Purdum J, Sakhibullin N, Sklyanov A, Smith R, Szkody P, Vanderbosch ZP. 2023. SRGeJ045359.9+622444: A 55 minute period eclipsing AM Canum Venaticorum star discovered from a joint SRG/eROSITA + ZTF search. The Astrophysical Journal. 954(1), 63."},"publication":"The Astrophysical Journal","title":"SRGeJ045359.9+622444: A 55 minute period eclipsing AM Canum Venaticorum star discovered from a joint SRG/eROSITA + ZTF search","issue":"1","date_updated":"2024-04-02T06:58:03Z","year":"2023","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","article_type":"original","volume":954,"day":"23","publication_status":"published","scopus_import":"1","article_processing_charge":"No","language":[{"iso":"eng"}]}