Probing the Interplay between Jets, Winds, and Multi-phase Gas in 11 Radio-quiet PG Quasars: A uGMRT-VLA Study
We present polarization-sensitive images from the Karl G. Jansky Very Large Array (VLA) at 5 GHz of 11 radio-quiet PG quasars. Based on the radio morphology, spectral index, and polarization properties from the VLA study, coupled with the findings of our previous 685 MHz uGMRT data, we find the pres...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/acf7c9 |
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| author | Silpa S. P. Kharb Luis C. Ho C. M. Harrison |
| author_facet | Silpa S. P. Kharb Luis C. Ho C. M. Harrison |
| author_sort | Silpa S. |
| collection | DOAJ |
| description | We present polarization-sensitive images from the Karl G. Jansky Very Large Array (VLA) at 5 GHz of 11 radio-quiet PG quasars. Based on the radio morphology, spectral index, and polarization properties from the VLA study, coupled with the findings of our previous 685 MHz uGMRT data, we find the presence of low-power jets on subarcsecond and arcsecond scales in nine sources; some show signatures of bent jets. The origin of radio emission remains unclear in the remaining two sources. Of the 11 sources, linear polarization is detected in four of them with fractional polarization ranging between 2% and 21%. In PG 1229+204, the inferred B-field direction is parallel to the local kiloparsec-scale jet direction. The inferred B-fields are transverse to the weak southward extension in PG 0934+013. For PG 0050+124 and PG 0923+129, the relationship between the B-field structure and radio outflow direction remains unclear. Localized or small-scale jet–medium interactions can be inferred across the sample based on the VLA jet kinetic power arguments and polarization data. These may have the potential as a feedback mechanism. We find that the radio properties do not show strong correlations with the star formation, [O iii ] and CO quantities published in the literature. The lack of evidence of AGN feedback on the global galaxy properties could be due to the relative timescales of AGN activity and those over which any impact might be taking place. |
| first_indexed | 2024-03-11T10:26:11Z |
| format | Article |
| id | doaj.art-e7dd31ded20249918d668aef80fb609c |
| institution | Directory Open Access Journal |
| issn | 1538-4357 |
| language | English |
| last_indexed | 2024-03-11T10:26:11Z |
| publishDate | 2023-01-01 |
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| series | The Astrophysical Journal |
| spelling | doaj.art-e7dd31ded20249918d668aef80fb609c2023-11-15T16:01:34ZengIOP PublishingThe Astrophysical Journal1538-43572023-01-0195814710.3847/1538-4357/acf7c9Probing the Interplay between Jets, Winds, and Multi-phase Gas in 11 Radio-quiet PG Quasars: A uGMRT-VLA StudySilpa S.0https://orcid.org/0000-0003-0667-7074P. Kharb1https://orcid.org/0000-0003-3203-1613Luis C. Ho2https://orcid.org/0000-0001-6947-5846C. M. Harrison3https://orcid.org/0000-0001-8618-4223National Centre for Radio Astrophysics (NCRA)—Tata Institute of Fundamental Research (TIFR), S.P. Pune University Campus , Ganeshkhind, Pune 411007, India; Departamento de Astronomía, Universidad de Concepción , Concepción, ChileNational Centre for Radio Astrophysics (NCRA)—Tata Institute of Fundamental Research (TIFR), S.P. Pune University Campus , Ganeshkhind, Pune 411007, IndiaKavli Institute for Astronomy and Astrophysics, Peking University , Beijing 100871, People’s Republic of China; Department of Astronomy, School of Physics, Peking University , Beijing 100871, People’s Republic of ChinaSchool of Mathematics, Statistics and Physics, Newcastle University , Newcastle upon Tyne NE1 7RU, UKWe present polarization-sensitive images from the Karl G. Jansky Very Large Array (VLA) at 5 GHz of 11 radio-quiet PG quasars. Based on the radio morphology, spectral index, and polarization properties from the VLA study, coupled with the findings of our previous 685 MHz uGMRT data, we find the presence of low-power jets on subarcsecond and arcsecond scales in nine sources; some show signatures of bent jets. The origin of radio emission remains unclear in the remaining two sources. Of the 11 sources, linear polarization is detected in four of them with fractional polarization ranging between 2% and 21%. In PG 1229+204, the inferred B-field direction is parallel to the local kiloparsec-scale jet direction. The inferred B-fields are transverse to the weak southward extension in PG 0934+013. For PG 0050+124 and PG 0923+129, the relationship between the B-field structure and radio outflow direction remains unclear. Localized or small-scale jet–medium interactions can be inferred across the sample based on the VLA jet kinetic power arguments and polarization data. These may have the potential as a feedback mechanism. We find that the radio properties do not show strong correlations with the star formation, [O iii ] and CO quantities published in the literature. The lack of evidence of AGN feedback on the global galaxy properties could be due to the relative timescales of AGN activity and those over which any impact might be taking place.https://doi.org/10.3847/1538-4357/acf7c9Radio quiet quasarsRadio continuum emissionPolarimetry |
| spellingShingle | Silpa S. P. Kharb Luis C. Ho C. M. Harrison Probing the Interplay between Jets, Winds, and Multi-phase Gas in 11 Radio-quiet PG Quasars: A uGMRT-VLA Study The Astrophysical Journal Radio quiet quasars Radio continuum emission Polarimetry |
| title | Probing the Interplay between Jets, Winds, and Multi-phase Gas in 11 Radio-quiet PG Quasars: A uGMRT-VLA Study |
| title_full | Probing the Interplay between Jets, Winds, and Multi-phase Gas in 11 Radio-quiet PG Quasars: A uGMRT-VLA Study |
| title_fullStr | Probing the Interplay between Jets, Winds, and Multi-phase Gas in 11 Radio-quiet PG Quasars: A uGMRT-VLA Study |
| title_full_unstemmed | Probing the Interplay between Jets, Winds, and Multi-phase Gas in 11 Radio-quiet PG Quasars: A uGMRT-VLA Study |
| title_short | Probing the Interplay between Jets, Winds, and Multi-phase Gas in 11 Radio-quiet PG Quasars: A uGMRT-VLA Study |
| title_sort | probing the interplay between jets winds and multi phase gas in 11 radio quiet pg quasars a ugmrt vla study |
| topic | Radio quiet quasars Radio continuum emission Polarimetry |
| url | https://doi.org/10.3847/1538-4357/acf7c9 |
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