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Pregled bibliografske jedinice broj: 673435

Časopis

Autori: Aleksić, Jelena; ...; Babić, Ana; ...; Dominis Prester, Dijana; ...; Ferenc, Daniel; ...; Godinović, Nikola; ...; Hrupec, Dario; ...; Lelas, Damir; ...; Puljak, Ivica; ...; Surić, Tihomir; ...; Šnidarić, Iva; ...; Terzić, Tomislav; ...
Naslov: Optimized dark matter searches in deep observations of Segue 1 with MAGIC
Izvornik: Journal of cosmology and astroparticle physics (1475-7516) (2014); 008-1-008-35
Vrsta rada: članak
Ključne riječi: dark matter; indirect searches; gamma-ray experiments; Imaging Air Cherenkov Telescopes; dwarf spheroidal galaxies; Segue 1
Sažetak:
We present the results of stereoscopic observations of the satellite galaxy Segue 1 with the MAGIC Telescopes, carried out between 2011 and 2013. With almost 160 hours of good- quality data, this is the deepest observational campaign on any dwarf galaxy performed so far in the very high energy range of the electromagnetic spectrum. We search this large data sample for signals of dark matter particles in the mass range between 100 GeV and 20 TeV. For this we use the full likelihood analysis method, which provides optimal sensitivity to characteristic gamma-ray spectral features, like those expected from dark matter annihilation or decay. In particular, we focus our search on gamma-rays produced from different final state Standard Model particles, annihilation with internal bremsstrahlung, monochromatic lines and box- shaped signals. Our results represent the most stringent constraints to the annihilation cross-section or decay lifetime obtained from observations of satellite galaxies, for masses above few hundred GeV. In particular, our strongest limit (95% confidence level) corresponds to a ~500 GeV dark matter particle annihilating into tau+tau-, and is of order ~ 1.2x10^{; ; ; ; ; ; -24}; ; ; ; ; ; cm^3 s^{; ; ; ; ; ; -1}; ; ; ; ; ; - a factor ~40 above the thermal value.
Projekt / tema: HRZZ-09/176
Izvorni jezik: ENG
Rad je indeksiran u
bazama podataka:
Current Contents Connect (CCC)
Scopus
SCI-EXP, SSCI i/ili A&HCI
Science Citation Index Expanded (SCI-EXP) (sastavni dio Web of Science Core Collectiona)
Kategorija: Znanstveni
Znanstvena područja:
Fizika
Puni text rada: 673435.dark_matter_Segue1v2.pdf (tekst priložen 6. Vel. 2014. u 19:00 sati)
URL Internet adrese: http://fulir.irb.hr/1670/
http://iopscience.iop.org/1475-7516/2014/02/008/
http://arxiv.org/abs/1312.1535v2
Broj citata:
Altmetric:
DOI: 10.1088/1475-7516/2014/02/008
URL cjelovitog teksta: http://fulir.irb.hr/1670/
Google Scholar: Optimized dark matter searches in deep observations of Segue 1 with MAGIC
Upisao u CROSBI: Dario Hrupec (Dario.Hrupec@irb.hr), 6. Sij. 2014. u 19:55 sati



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