Jet-triggered star formation in young radio galaxies

被引：9

作者：

Duggal, Chetna ^{[1
]}

O'Dea, Christopher ^{[1
]}

Baum, Stefi ^{[1
]}

Labiano, Alvaro ^{[2
,3
]}

Morganti, Raffaella ^{[4
,5
]}

Tadhunter, Clive ^{[6
]}

Worrall, Diana ^{[7
]}

Tremblay, Grant ^{[8
]}

Dicken, Daniel ^{[9
]}

Capetti, Alessandro ^{[10
]}

机构：

[1] Univ Manitoba, Dept Phys & Astron, Winnipeg, MB R3T 2N2, Canada

[2] CSIC, INTA, Ctr Astrobiol CAB, ESAC Campus, Madrid, Spain

[3] ESAC, Telespazio UK European Space Agcy ESA, Madrid, Spain

[4] Univ Groningen, Kapteyn Astron Inst, Groningen, Netherlands

[5] ASTRON, Netherlands Inst Radio Astron, Dwingeloo, Netherlands

[6] Univ Sheffield, Dept Phys & Astron, Sheffield, S Yorkshire, England

[7] Univ Bristol, HH Wills Phys Lab, Bristol, Avon, England

[8] Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA

[9] Univ Paris Diderot, Univ Paris Saclay, CNRS, AIM,CEA, Gif Sur Yvette, France

[10] INAF Osservatorio Astrofis Torino, Pino Torinese, Italy

来源：

ASTRONOMISCHE NACHRICHTEN | 2021年 / 342卷 / 9-10期

基金：

加拿大自然科学与工程研究理事会;

关键词：

active galactic nuclei; feedback; galaxies; star formation; young radio source; COMPACT STEEP-SPECTRUM; GHZ-PEAKED-SPECTRUM; SAMPLE; MORPHOLOGY; ALIGNMENT; EVOLUTION; EXCESS; GAS;

D O I：

10.1002/asna.20210054

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Emission in the ultraviolet continuum is a salient signature of the hot, massive, and consequently short-lived, stellar population that traces recent or ongoing star formation. With the aim of mapping star forming regions and morphologically separating the generic star formation from that associated with the galaxy-scale jet activity, we obtained high-resolution ultraviolet (UV) imaging from the Hubble Space Telescope for a sample of nine compact radio sources. Out of these, seven are known Compact Steep Spectrum (CSS) galaxies that host young, kiloparsec-scale radio sources and hence are the best candidates for studying radio-mode feedback on galaxy scales, while the other two form a control sample of larger sources. Extended UV emission regions are observed in six of the seven CSS sources showing close spatial alignment with the radio-jet orientation. If other mechanisms possibly contributing to the observed UV emission are ruled out, this could be evidence in support of jet-triggered star formation in the CSS phase of radio galaxy evolution and in turn of the "positive feedback" paradigm of host-active galactic nuclei interaction.

引用

页码：1087 / 1091

页数：5

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