Large scale X-ray and radio structures associated with compact extragalactic sources

Biermann, Peter L.; Pauliny-Toth, I. I. K.; Witzel, A.; Fricke, K. H.; Johnston, K. J.; Kuehr, H.; Strittmatter, P. A.; Urbanik, M.

doi:10.1086/183707

Cited by 12 publications

(5 citation statements)

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“…Biermann and Fricke propose that short bursts of star formation (which last ~ 10 7 years) can account for the broad-band colors of the blue galaxies; moreover, it is argued that the weak radio emission from the blue galaxies is attributable to the integrated flux of the resulting supernova remnants. Comparison of the models with optical and radio observations (Bieging et al 1977;Biermann et al 1980) supports the burst hypothesis. Biermann (1977) also shows that a similar model may be applicable to SO galaxies.…”

Section: Introductionsupporting

confidence: 66%

“…These data are intended to complement radio data which have been previously published (Bieging et al 1977;Bieging and "Visiting Astronomer at Kitt Peak National Observatory, which is operated by the Association of Universities for Research in Astronomy, Inc., under contract with the National Science Foundation. Biermann 1977;Biermann, Clarke, and Fricke 1979a,h;Biermann et al 1980) or which will appear elsewhere.…”

Section: Introductionmentioning

confidence: 91%

See 1 more Smart Citation

UBV photometry of Markarian and S0 galaxies

Peterson

Fricke

Biermann

1981

PASP

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Section: Introductionsupporting

confidence: 66%

Section: Introductionmentioning

confidence: 91%

UBV photometry of Markarian and S0 galaxies

Peterson

Fricke

Biermann

1981

PASP

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“…As can be seen from this list, only 16 objects out of 1469-13 QSOs and three BL Lac objects-are classic radio-loud objects. Therefore, despite their closeness, one does not expect Markarian sources to be a dominant component of neutrino sources observable at radio frequencies, simply because the Markarian galaxies are typically radio-quiet objects (e.g., Biermann et al 1980).…”

Section: Number Counts Of Crates Sources In the Z-samplesmentioning

confidence: 99%

Multiwavelength Search for the Origin of IceCube's Neutrinos

Kun

Bartos

Tjus

et al. 2022

ApJ

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The origin of astrophysical high-energy neutrinos detected by the IceCube Neutrino Observatory remains a mystery to be solved. In this paper we search for neutrino source candidates within the 90% containment area of 70 track-type neutrino events recorded by the IceCube Neutrino Observatory. By employing the Fermi-LAT 4FGL-DR2, the Swift-XRT 2SXPS, and the CRATES catalogs, we identify possible gamma-ray, X-ray, and flat-spectrum radio candidate sources of track-type neutrinos. We find that based on the brightness of sources and their spatial correlation with the track-type IceCube neutrinos, the constructed neutrino samples represent special populations of sources taken from the full Fermi-LAT 4FGL-DR2/Swift-XRT 2SXPS/CRATES catalogs with similar significance (2.1σ, 1.2σ, 2σ at 4.8 GHz, 2.1σ at 8.4 GHz, respectively, assuming 50% astrophysical signalness). After collecting redshifts and deriving subsamples of the CRATES catalog complete in the redshift–luminosity plane, we find that the 4.8 GHz (8.4 GHz) subsample can explain between 4% and 53% (3% and 42%) of the neutrinos (90% C.L.), when the probability of detecting a neutrino is proportional to the (k-corrected) radio flux. The overfluctuations indicate that a part of the sample is likely to contribute and that more sophisticated schemes in the source catalog selection are necessary to identify the neutrino sources at the 5σ level. Our selection serves as a starting point to further select the correct sources.

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“…Therefore, despite their closeness, one does not expect Markarian sources to be a dominant component of neutrino sources observable at radio frequencies, simply because the Markarian galaxies are typically radio-quiet objects (e.g. Biermann et al 1980).…”

Section: Number Counts Of Crates Sources In the Z-samplesmentioning

confidence: 99%

Multiwavelength search for the origin of IceCube's neutrinos

Kun,

Bartos,

Tjus

et al. 2022

Preprint

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The origin of astrophysical high-energy neutrinos detected by the IceCube Neutrino Observatory remains a mystery to be solved. In this paper we search for neutrino source candidates within the 90% containment area of 70 track-like neutrino events recorded by the IceCube Neutrino Observatory. By employing the Fermi/LAT 4FGL-DR2, the Swift-XRT 2SXPS and the CRATES catalogs, we identify possible gamma, X-ray and flat-spectrum radio candidate sources of track-type neutrinos. We find that based on the brightness of sources and their spatial correlation with the track-type IceCube neutrinos, the constructed neutrino samples represent special populations of sources taken from the full Fermi-LAT 4FGL-DR2/Swift-XRT 2SXPS/CRATES catalogs with similar p-values of 0.022/0.032/0.029 (4.8 GHz)/0.021 (8.4 GHz), respectively, when we assume 50% astrophysical signalness (IceCube GOLDchannel) of the neutrinos. After collecting redshifts and deriving sub-samples of the CRATES catalog complete in luminosities, we find that the 4.8 GHz (8.4 GHz) sub-sample can explain 6.6 +11.9 −5.2 (4.4 +10.3 −3.5 ) neutrinos (90% C.L.) assuming they have 50% astrophysical signalness, and assuming that the probability to detect a neutrino is proportional to the (k-corrected) radio flux. The overfluctuations indicate that a part of the sample is likely to contribute and that more sophisticated schemes in the source catalog selection are necessary to identify the neutrino sources at the 5σ level. Our selection serves as a starting point to further select the correct sources.

show abstract

Large scale X-ray and radio structures associated with compact extragalactic sources

Cited by 12 publications

References 0 publications

UBV photometry of Markarian and S0 galaxies

UBV photometry of Markarian and S0 galaxies

Multiwavelength Search for the Origin of IceCube's Neutrinos

Multiwavelength search for the origin of IceCube's neutrinos

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