Reply to 'Comment on ‘Understanding the γ -ray emission from the globular cluster 47 Tuc: Evidence for dark matter?'’
In: Physical Review D, 2019
Online
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Zugriff:
Analysing 9 years of Fermi-LAT observations, we recently studied the spectral properties of the prominent globular cluster 47 Tuc (Brown et al. 2018). In particular, we investigated several models to explain the observed gamma-ray emission, ranging from millisecond pulsars (MSP) to Dark Matter (DM), with the motivation for the latter model driven by recent evidence that 47 Tuc harbours an intermediate-mass black hole (IMBH). This investigation found evidence that the observed gamma-ray emission from 47 Tuc is due to two source populations of MSPs and DM. In Bartels \& Edwards (2018), the authors comment that this evidence is an artifact of the MSP spectra used in (Brown et al. 2019). Here we reply to this comment and argue that the authors of Bartels \& Edwards (2018) (i) do not give due consideration to a very important implication of their result and (ii) there is tension between our MSP fit and their MSP fit when taking uncertainties into consideration. As such, we still conclude there is evidence for a DM component which motivates a deeper radio study of the prominent globular cluster 47 Tuc.
3 pages, accepted for publication in PRD
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Reply to 'Comment on ‘Understanding the γ -ray emission from the globular cluster 47 Tuc: Evidence for dark matter?'’
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Autor/in / Beteiligte Person: | Bœhm, Céline ; Brown, Anthony M. ; Lloyd, Sheridan J. ; Chadwick, P. M. ; Lacroix, Thomas ; Laboratoire Univers et Particules de Montpellier (LUPM) ; Université Montpellier 2 - Sciences et Techniques (UM2)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS) ; Laboratoire d'Annecy-le-Vieux de Physique Théorique (LAPTH) ; Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS) ; Université de Montpellier (UM)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) |
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Zeitschrift: | Physical Review D, 2019 |
Veröffentlichung: | 2019 |
Medientyp: | unknown |
ISSN: | 2470-0010 (print) ; 1550-7998 (print) ; 1550-2368 (print) |
DOI: | 10.1103/physrevd.100.068302 |
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