The Consistency of Fermi-LAT Observations of the Galactic Center with a Millisecond Pulsar Population in the Central Stellar Cluster

By K. Abazajian. 2010

220 citations recorded by the source corpus.

I show that the spectrum and morphology of a recent Fermi-LAT observation of the Galaxy center are consistent with a millisecond pulsar population in the nuclear Central stellar cluster of the Milky Way. The Galaxy Center gamma-ray spectrum is consistent with the spectrum of four of eight globular clusters that have been detected in the gamma-ray. A dark matter annihilation interpretation cannot be ruled out, though no unique features exist that would require this conclusion.

Subfields: Astronomy and Astrophysics, Instrumentation, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/1c43474562ae8ccff83c58c886e4626b31b664a8

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

1. P. Hopkins
2. C. Faucher-Giguére
3. D. Keres̆
4. E. Quataert
5. R. Dav'e
6. A. Muratov
7. Caltech
8. Uc Berkeley

In Instrumentation

1. P. Hopkins
2. C. Faucher-Giguére
3. Caltech
4. Uc Berkeley
5. D. Kerevs
6. A. Muratov
7. Northwestern
8. J. Oñorbe

In Nuclear and High Energy Physics

1. Christoph Weniger
2. C. McCabe
3. J. Gaskins
4. F. Calore
5. P. Hopkins
6. I. Cholis
7. Anna Franckowiak
8. M. Dolan

Citations in the corpus

• WIMP dark matter candidates and searches—current status and future prospects (2017, background): “d MSPs is known to be compatible with a power law exhibiting an exponential cuto around 2 3GeV [299]. It was shown that the GCE can be partly or completely explained by a population of MSPs in the GC [283,300]. However there is some disagreement as to whether MSPs are really a viable explanation for”
• A review of indirect searches for particle dark matter (2016, background): “In particular, gamma-raymillisecond pulsars (MSPs) have been proposed as a possible explanation for theGeVexcess [129].”
• The impact of baryonic physics on the structure of dark matter haloes: the view from the FIRE cosmological simulations (2015, background): “…(Goodenough & Hooper 2009; Hooper & Goodenough 2011; Hooper & Linden 2011; Boyarsky et al. 2011; Abazajian & Kapling- c© 0000 RAS, MNRAS 000, 000–000 hat 2012; Gordon & Macías 2013; Macias & Gordon 2014; Abazajian et al. 2014) although other possibilities remain valid alternatives (Abazajian 2011).”
• Extended gamma-ray emission from Coy Dark Matter (2014, methodology): “Evidence for a spatially extended excess of gamma-rays in this region was initially found in [10] and subsequently confirmed by several independent analyses [11–17].”
• Dark matter and pulsar model constraints from Galactic Center Fermi-LAT gamma-ray observations (2013, result): “The signal was also shown to be consistent with a population of millisecond pulsars (MSPs) in the GC [17, 18, 21].”
• The Fermi Galactic Center GeV Excess and Implications for Dark Matter (2017, methodology): “We will consider an MSP-like spectrum, since a population of MSPs is expected to contribute to gamma-ray emission near the GC (Abazajian 2011; Gordon & Macías 2013; Grégoire & Knödlseder 2013; Mirabal 2013; Yuan & Zhang 2014; Brandt & Kocsis 2015; Petrović et al. 2015; Hooper & Linden 2016), as…”
• Gamma Ray Signals from Dark Matter: Concepts, Status and Prospects (2012, result): “While it can be argued that there still remains a bit of controversy in some of these cases, evidence is certainly not compelling; instead, in the past, more refined analyses and new data often tended to either disfavor the DM hypotheses previously put forward or make it less compelling in view of v”
• Background model systematics for the Fermi GeV excess (2014, background): “Firstly, the excess gamma-ray emission could originate from a population of gamma-ray MSPs associated with the central stellar cluster and not yet detected by the Fermi -LAT [54, 64–66] (as already suggested in ref.”