Wavelet-based techniques for the gamma-ray sky

被引：12

作者：

McDermott, Samuel D. ^{[1
]}

Fox, Patrick J. ^{[2
]}

Cholis, Ilias ^{[3
,4
]}

Lee, Samuel K. ^{[5
,6
]}

机构：

[1] SUNY Stony Brook, CN Yang Inst Theoret Phys, Stony Brook, NY 11794 USA

[2] Fermilab Natl Accelerator Lab, Theoret Phys Dept, MS 106, Batavia, IL 60510 USA

[3] Johns Hopkins Univ, Dept Phys & Astron, 3400 N Charles St, Baltimore, MD 21218 USA

[4] Fermilab Natl Accelerator Lab, Ctr Particle Astrophys, POB 500, Batavia, IL 60510 USA

[5] Broad Inst, 75 Ames St, Cambridge, MA 02142 USA

[6] Princeton Univ, Princeton Ctr Theoret Sci, Jadwin Hall, Princeton, NJ 08544 USA

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2016年 / 07期

基金：

美国国家科学基金会;

关键词：

dark matter theory; gamma ray detectors; FERMI-LAT OBSERVATIONS; DARK-MATTER; EMISSION; ANNIHILATION; BUBBLES; EXCESS; SIGNAL;

D O I：

10.1088/1475-7516/2016/07/045

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We demonstrate how the image analysis technique of wavelet decomposition can be applied to the gamma-ray sky to separate emission on different angular scales. New structures on scales that differ from the scales of the conventional astrophysical foreground and background uncertainties can be robustly extracted, allowing a model-independent characterization with no presumption of exact signal morphology. As a test case, we generate mock gamma-ray data to demonstrate our ability to extract extended signals without assuming a fixed spatial template. For some point source luminosity functions, our technique also allows us to differentiate a diffuse signal in gamma-rays from dark matter annihilation and extended gamma-ray point source populations in a data-driven way.

引用

页数：27

共 118 条

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