Search for High-energy Neutrinos from Ultraluminous Infrared Galaxies with IceCube
Ultraluminous infrared galaxies (ULIRGs) have infrared luminosities L $_{IR}$ ≥ 10$^{12}$ L $_{⊙}$, making them the most luminous objects in the infrared sky. These dusty objects are generally powered by starbursts with star formation rates that exceed 100 M $_{⊙}$ yr$^{−1}$, possibly combined with...
Published in: | The Astrophysical Journal |
---|---|
Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Univ.
2022
|
Subjects: | |
Online Access: | https://bib-pubdb1.desy.de/record/476017 https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2022-01558%22 |
Summary: | Ultraluminous infrared galaxies (ULIRGs) have infrared luminosities L $_{IR}$ ≥ 10$^{12}$ L $_{⊙}$, making them the most luminous objects in the infrared sky. These dusty objects are generally powered by starbursts with star formation rates that exceed 100 M $_{⊙}$ yr$^{−1}$, possibly combined with a contribution from an active galactic nucleus. Such environments make ULIRGs plausible sources of astrophysical high-energy neutrinos, which can be observed by the IceCube Neutrino Observatory at the South Pole. We present a stacking search for high-energy neutrinos from a representative sample of 75 ULIRGs with redshift z ≤ 0.13 using 7.5 yr of IceCube data. The results are consistent with a background-only observation, yielding upper limits on the neutrino flux from these 75 ULIRGs. For an unbroken E $^{−2.5}$ power-law spectrum, we report an upper limit on the stacked flux at 90% confidence level. In addition, we constrain the contribution of the ULIRG source population to the observed diffuse astrophysical neutrino flux as well as model predictions. |
---|