Do high energy astrophysical neutrinos trace star formation?

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The IceCube Neutrino Observatory has provided the first map of the high energy (∼ 0.01-1 PeV) sky in neutrinos. Since neutrinos propagate undeflected, their arrival direction is an important identifier for sources of high energy particle acceleration. Reconstructed arrival directions are consistent with an extragalactic origin, with possibly a galactic component, of the neutrino flux. We present a statistical analysis of positional coincidences of the IceCube neutrinos with known astrophysical objects from several catalogs. When considering starburst galaxies with the highest flux in gamma-rays and infrared radiation, up to n=8 coincidences are found, representing an excess over the ∼4 predicted for the randomized, or ''null'' distribution. The probability that this excess is realized in the null case, the p-value, is p=0.042. This value falls to p=0.003 for a partial subset of gamma-ray-detected starburst galaxies and superbubble regions in the galactic neighborhood. Therefore, it is possible that starburst galaxies, and the typically hundreds of superbubble regions within them, might account for a portion of IceCube neutrinos. The physical plausibility of such correlation is discussed briefly.

Original languageEnglish (US)
Article number029
JournalJournal of Cosmology and Astroparticle Physics
Volume2015
Issue number12
DOIs
StatePublished - Dec 14 2015

Fingerprint

star formation
astrophysics
neutrinos
starburst galaxies
arrivals
energy
gamma rays
particle acceleration
infrared radiation
statistical analysis
set theory
catalogs
sky
observatories
radiation

Keywords

  • gamma ray experiments
  • neutrino astronomy
  • neutrino experiments
  • star formation

ASJC Scopus subject areas

  • Astronomy and Astrophysics

Cite this

Do high energy astrophysical neutrinos trace star formation? / Emig, Kimberly; Lunardini, Cecilia; Windhorst, Rogier.

In: Journal of Cosmology and Astroparticle Physics, Vol. 2015, No. 12, 029, 14.12.2015.

Research output: Contribution to journalArticle

@article{bd0202db21e146a082000fde584c2909,
title = "Do high energy astrophysical neutrinos trace star formation?",
abstract = "The IceCube Neutrino Observatory has provided the first map of the high energy (∼ 0.01-1 PeV) sky in neutrinos. Since neutrinos propagate undeflected, their arrival direction is an important identifier for sources of high energy particle acceleration. Reconstructed arrival directions are consistent with an extragalactic origin, with possibly a galactic component, of the neutrino flux. We present a statistical analysis of positional coincidences of the IceCube neutrinos with known astrophysical objects from several catalogs. When considering starburst galaxies with the highest flux in gamma-rays and infrared radiation, up to n=8 coincidences are found, representing an excess over the ∼4 predicted for the randomized, or ''null'' distribution. The probability that this excess is realized in the null case, the p-value, is p=0.042. This value falls to p=0.003 for a partial subset of gamma-ray-detected starburst galaxies and superbubble regions in the galactic neighborhood. Therefore, it is possible that starburst galaxies, and the typically hundreds of superbubble regions within them, might account for a portion of IceCube neutrinos. The physical plausibility of such correlation is discussed briefly.",
keywords = "gamma ray experiments, neutrino astronomy, neutrino experiments, star formation",
author = "Kimberly Emig and Cecilia Lunardini and Rogier Windhorst",
year = "2015",
month = "12",
day = "14",
doi = "10.1088/1475-7516/2015/12/029",
language = "English (US)",
volume = "2015",
journal = "Journal of Cosmology and Astroparticle Physics",
issn = "1475-7516",
publisher = "IOP Publishing Ltd.",
number = "12",

}

TY - JOUR

T1 - Do high energy astrophysical neutrinos trace star formation?

AU - Emig, Kimberly

AU - Lunardini, Cecilia

AU - Windhorst, Rogier

PY - 2015/12/14

Y1 - 2015/12/14

N2 - The IceCube Neutrino Observatory has provided the first map of the high energy (∼ 0.01-1 PeV) sky in neutrinos. Since neutrinos propagate undeflected, their arrival direction is an important identifier for sources of high energy particle acceleration. Reconstructed arrival directions are consistent with an extragalactic origin, with possibly a galactic component, of the neutrino flux. We present a statistical analysis of positional coincidences of the IceCube neutrinos with known astrophysical objects from several catalogs. When considering starburst galaxies with the highest flux in gamma-rays and infrared radiation, up to n=8 coincidences are found, representing an excess over the ∼4 predicted for the randomized, or ''null'' distribution. The probability that this excess is realized in the null case, the p-value, is p=0.042. This value falls to p=0.003 for a partial subset of gamma-ray-detected starburst galaxies and superbubble regions in the galactic neighborhood. Therefore, it is possible that starburst galaxies, and the typically hundreds of superbubble regions within them, might account for a portion of IceCube neutrinos. The physical plausibility of such correlation is discussed briefly.

AB - The IceCube Neutrino Observatory has provided the first map of the high energy (∼ 0.01-1 PeV) sky in neutrinos. Since neutrinos propagate undeflected, their arrival direction is an important identifier for sources of high energy particle acceleration. Reconstructed arrival directions are consistent with an extragalactic origin, with possibly a galactic component, of the neutrino flux. We present a statistical analysis of positional coincidences of the IceCube neutrinos with known astrophysical objects from several catalogs. When considering starburst galaxies with the highest flux in gamma-rays and infrared radiation, up to n=8 coincidences are found, representing an excess over the ∼4 predicted for the randomized, or ''null'' distribution. The probability that this excess is realized in the null case, the p-value, is p=0.042. This value falls to p=0.003 for a partial subset of gamma-ray-detected starburst galaxies and superbubble regions in the galactic neighborhood. Therefore, it is possible that starburst galaxies, and the typically hundreds of superbubble regions within them, might account for a portion of IceCube neutrinos. The physical plausibility of such correlation is discussed briefly.

KW - gamma ray experiments

KW - neutrino astronomy

KW - neutrino experiments

KW - star formation

UR - http://www.scopus.com/inward/record.url?scp=84953885780&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84953885780&partnerID=8YFLogxK

U2 - 10.1088/1475-7516/2015/12/029

DO - 10.1088/1475-7516/2015/12/029

M3 - Article

VL - 2015

JO - Journal of Cosmology and Astroparticle Physics

JF - Journal of Cosmology and Astroparticle Physics

SN - 1475-7516

IS - 12

M1 - 029

ER -