@Article{FortesMiraStecWuen:2021:DaMaAn,
               author = "Fortes, Elaine C. F. S. and Miranda, Oswaldo Duarte and Stecker, 
                         Floyd W. and Wuensche, Carlos Alexandre",
          affiliation = "{Universidade Federal do Pampa (UNIPAMPA)} and {Instituto Nacional 
                         de Pesquisas Espaciais (INPE)} and {NASA Goddard Space Flight 
                         Center} and {Instituto Nacional de Pesquisas Espaciais (INPE)}",
                title = "Dark matter annihilation in the most luminous and the most massive 
                         ultra-compact dwarf galaxies (UCD)",
              journal = "Journal of Cosmology and Astroparticle Physics",
                 year = "2021",
               volume = "3",
                pages = "e003",
                month = "Mar.",
             keywords = "dark matter simulations, dark matter theory, dwarfs galaxies, 
                         massive black holes.",
             abstract = "In this paper, we explore the potential astrophysical signatures 
                         of dark matter (DM) annihilations in ultra-compact dwarf galaxies 
                         (UCDs) considering two of the richest known galaxy clusters within 
                         100 million light-years, nominally, Virgo and Fornax. Fornax UCD3 
                         is the most luminous known UCD and M59 UCD3 is the most massive 
                         known UCD. With the detection of a 3.5 million solar mass black 
                         hole (BH) in Fornax UCD3, we carefully model several dark matter 
                         (DM) enhanced profile scenarios, considering the presence of both 
                         a supermassive black hole (SMBH) and DM. For Fornax UCD3, the 
                         comparison of the stellar and dynamical masses suggests that there 
                         is little content of DM in UCDs. M59 UCD3 did not receive the same 
                         attention in simulations as Fornax UCD3, however deep radio 
                         imaging and X-ray observations were performed for M59 UCD3 and can 
                         be used to place limits in DM content of these UCDs. We take an 
                         average estimate of dark matter content and used the Salpeter and 
                         Kroupa mass functions. We model Fornax UCD3 and M59 UCD3 to have a 
                         DM content that is the average of these mass functions. We then 
                         analyze the constraints for Fornax and M59 UCD3 coming from 
                         gamma-ray and radio sources, considering a dark matter particle 
                         with a mass between 10 and 34 GeV in our simulations. In the 
                         absence of a strong gamma-ray signature, we show that the 
                         synchrotron emission from electrons and positrons produced by DM 
                         annihilations can be very sensitive to indirect DM search. We find 
                         that DM parameters can be significantly constrained at radio 
                         frequencies and that the spike profiles play an interesting role 
                         in the deep study of the enhancements of DM \& BH interactions in 
                         ultra-compact galaxies.",
                  doi = "10.1088/1475-7516/2021/03/003",
                  url = "http://dx.doi.org/10.1088/1475-7516/2021/03/003",
                 issn = "1475-7516",
             language = "en",
           targetfile = "fortes_dark.pdf",
        urlaccessdate = "20 maio 2024"
}