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Search for Gamma-Ray Emission from Local Primordial Black Holes with the Fermi Large Area Telescope
Ackermann M. - ไม่ระบุหน่วยงาน
ชื่อเรื่อง (EN): Search for Gamma-Ray Emission from Local Primordial Black Holes with the Fermi Large Area Telescope
ผู้แต่ง / หัวหน้าโครงการ (EN): Ackermann M.
บทคัดย่อ (EN): Black holes with masses below approximately 1015 g are expected to emit gamma-rays with energies above a few tens of MeV, which can be detected by the Fermi Large Area Telescope (LAT). Although black holes with these masses cannot be formed as a result of stellar evolution, they may have formed in the early universe and are therefore called primordial black holes (PBHs). Previous searches for PBHs have focused on either short-timescale bursts or the contribution of PBHs to the isotropic gamma-ray emission. We show that, in cases of individual PBHs, the Fermi-LAT is most sensitive to PBHs with temperatures above approximately 16 GeV and masses 6 ×1011 g, which it can detect out to a distance of about 0.03 pc. These PBHs have a remaining lifetime of months to years at the start of the Fermi mission. They would appear as potentially moving point sources with gamma-ray emission that become spectrally harder and brighter with time until the PBH completely evaporates. In this paper, we develop a new algorithm to detect the proper motion of gamma-ray point sources, and apply it to 318 unassociated point sources at a high galactic latitude in the third Fermi-LAT source catalog. None of the unassociated point sources with spectra consistent with PBH evaporation show significant proper motion. Using the nondetection of PBH candidates, we derive a 99% confidence limit on the PBH evaporation rate in the vicinity of Earth, PPBH < 7.2 × 103 pc-3 yr-1. This limit is similar to the limits obtained with ground-based gamma-ray observatories. © 2018. The American Astronomical Society. All rights reserved.
บทคัดย่อ: ไม่พบข้อมูลจากหน่วยงานต้นทาง
ภาษา (EN): en
เอกสารแนบ (EN): https://www.scopus.com/inward/record.uri?eid=2-s2.0-85045575187&doi=10.3847%2f1538-4357%2faaac7b&partnerID=40&md5=9f74ce3dc7a137aa2c16b736de68f9a3
เผยแพร่โดย (EN): มหาวิทยาลัยมหิดล
คำสำคัญ (EN): methods: data analysis
เจ้าของลิขสิทธิ์ (EN): มหาวิทยาลัยมหิดล
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Search for Gamma-Ray Emission from Local Primordial Black Holes with the Fermi Large Area Telescope
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