Home > Research > Publications & Outputs > An analysis of the local causes and effects of ...

### Electronic data

• BAHAMAS_NLUAstro_2_1

Rights statement: Fully open source

Final published version, 1.38 MB, PDF document

## An analysis of the local causes and effects of AGN produced jets in galaxies at z~2-3.5

Research output: Contribution to Journal/MagazineJournal article

Published

### Standard

An analysis of the local causes and effects of AGN produced jets in galaxies at z~2-3.5. / Stevens, Georgia; Warner, Jim; Head, Daniel; Griffin, Stephen; Foster, Alaister; Sobral, David.

In: Notices of Lancaster Astrophysics (NLUAstro), Vol. 2, 19.06.2020, p. 1-15.

Research output: Contribution to Journal/MagazineJournal article

### Harvard

Stevens, G, Warner, J, Head, D, Griffin, S, Foster, A & Sobral, D 2020, 'An analysis of the local causes and effects of AGN produced jets in galaxies at z~2-3.5', Notices of Lancaster Astrophysics (NLUAstro), vol. 2, pp. 1-15.

### APA

Stevens, G., Warner, J., Head, D., Griffin, S., Foster, A., & Sobral, D. (2020). An analysis of the local causes and effects of AGN produced jets in galaxies at z~2-3.5. Notices of Lancaster Astrophysics (NLUAstro), 2, 1-15.

### Vancouver

Stevens G, Warner J, Head D, Griffin S, Foster A, Sobral D. An analysis of the local causes and effects of AGN produced jets in galaxies at z~2-3.5. Notices of Lancaster Astrophysics (NLUAstro). 2020 Jun 19;2:1-15.

### Author

Stevens, Georgia ; Warner, Jim ; Head, Daniel ; Griffin, Stephen ; Foster, Alaister ; Sobral, David. / An analysis of the local causes and effects of AGN produced jets in galaxies at z~2-3.5. In: Notices of Lancaster Astrophysics (NLUAstro). 2020 ; Vol. 2. pp. 1-15.

### Bibtex

@article{77c98c1aa3a44b7090c93297cb3c9c10,
title = "An analysis of the local causes and effects of AGN produced jets in galaxies at z~2-3.5",
abstract = "We investigate the radio, X-Ray and far-infrared properties of active galactic nuclei (AGN) with strong radio jets at 2.2 < z < 3.5 in the COSMOS field and compare them to AGN without obvious radio jets at similar redshift. We identify 4 jet producing AGNs in the SC4K sample of distant Lyman-α emitting sources and 8 in the VLA radio catalogue, with 2 sources being represented in both, implying a jet fraction of 0.13±0.04% in Lyα emitters and 0.71±0.08% in the general radio-selected population. We find an average radio luminosity for the jets of (2.27±0.01)×10^25 W/Hz in the 3GHz band and (3.10±0.01)×10^25 W/Hz in the 1.4GHz band. We find that the average accretion rate of the AGNs with jets is 0.141+-0.07 M_sun/yr which is lower than the average of the radio AGN without jets, of 0.271+-0.091M_sun/yr. The star formation rate based on the far-infrared is found to be higher for AGN without jets o(~279 M_sun/yr) and to be a third of that value for AGN with jets (~92 M_sun/yr). All the jet producing AGNs we found at z < 3 had an X-ray hardness > 0 and average of 0.41±0.21, higher than the average for AGN without jets of 0.14±0.47. We conclude that the presence of jets may inhibit the AGN{\textquoteright}s current activity, due to the large size and luminosity of jets, the energy and matter distributions are altered in such a way that the galaxy{\textquoteright}s SFR and BHAR are impacted noticeably, agreeing with previous research and findings.",
author = "Georgia Stevens and Jim Warner and Daniel Head and Stephen Griffin and Alaister Foster and David Sobral",
note = "Stevens et al. (2020), NLUAstro, 2, 1",
year = "2020",
month = jun,
day = "19",
language = "English",
volume = "2",
pages = "1--15",
journal = "Notices of Lancaster Astrophysics (NLUAstro)",

}

### RIS

TY - JOUR

T1 - An analysis of the local causes and effects of AGN produced jets in galaxies at z~2-3.5

AU - Stevens, Georgia

AU - Warner, Jim

AU - Griffin, Stephen

AU - Foster, Alaister

AU - Sobral, David

N1 - Stevens et al. (2020), NLUAstro, 2, 1

PY - 2020/6/19

Y1 - 2020/6/19

N2 - We investigate the radio, X-Ray and far-infrared properties of active galactic nuclei (AGN) with strong radio jets at 2.2 < z < 3.5 in the COSMOS field and compare them to AGN without obvious radio jets at similar redshift. We identify 4 jet producing AGNs in the SC4K sample of distant Lyman-α emitting sources and 8 in the VLA radio catalogue, with 2 sources being represented in both, implying a jet fraction of 0.13±0.04% in Lyα emitters and 0.71±0.08% in the general radio-selected population. We find an average radio luminosity for the jets of (2.27±0.01)×10^25 W/Hz in the 3GHz band and (3.10±0.01)×10^25 W/Hz in the 1.4GHz band. We find that the average accretion rate of the AGNs with jets is 0.141+-0.07 M_sun/yr which is lower than the average of the radio AGN without jets, of 0.271+-0.091M_sun/yr. The star formation rate based on the far-infrared is found to be higher for AGN without jets o(~279 M_sun/yr) and to be a third of that value for AGN with jets (~92 M_sun/yr). All the jet producing AGNs we found at z < 3 had an X-ray hardness > 0 and average of 0.41±0.21, higher than the average for AGN without jets of 0.14±0.47. We conclude that the presence of jets may inhibit the AGN’s current activity, due to the large size and luminosity of jets, the energy and matter distributions are altered in such a way that the galaxy’s SFR and BHAR are impacted noticeably, agreeing with previous research and findings.

AB - We investigate the radio, X-Ray and far-infrared properties of active galactic nuclei (AGN) with strong radio jets at 2.2 < z < 3.5 in the COSMOS field and compare them to AGN without obvious radio jets at similar redshift. We identify 4 jet producing AGNs in the SC4K sample of distant Lyman-α emitting sources and 8 in the VLA radio catalogue, with 2 sources being represented in both, implying a jet fraction of 0.13±0.04% in Lyα emitters and 0.71±0.08% in the general radio-selected population. We find an average radio luminosity for the jets of (2.27±0.01)×10^25 W/Hz in the 3GHz band and (3.10±0.01)×10^25 W/Hz in the 1.4GHz band. We find that the average accretion rate of the AGNs with jets is 0.141+-0.07 M_sun/yr which is lower than the average of the radio AGN without jets, of 0.271+-0.091M_sun/yr. The star formation rate based on the far-infrared is found to be higher for AGN without jets o(~279 M_sun/yr) and to be a third of that value for AGN with jets (~92 M_sun/yr). All the jet producing AGNs we found at z < 3 had an X-ray hardness > 0 and average of 0.41±0.21, higher than the average for AGN without jets of 0.14±0.47. We conclude that the presence of jets may inhibit the AGN’s current activity, due to the large size and luminosity of jets, the energy and matter distributions are altered in such a way that the galaxy’s SFR and BHAR are impacted noticeably, agreeing with previous research and findings.

M3 - Journal article

VL - 2

SP - 1

EP - 15

JO - Notices of Lancaster Astrophysics (NLUAstro)

JF - Notices of Lancaster Astrophysics (NLUAstro)

ER -