Radio properties of the OH megamaser galaxy IRAS 02524+2046
Peng, Hao1; Wu, Zhongzu1; Zhang, Bo2; Chen, Yongjun2; Zheng, Xingwu3; Jiang, Dongrong2; Shen, Zhiqiang2; Chen, Xi4; Sotnikova, Yu, V5
AbstractWe present results from VLBI observations of continuum and OH line emission in IRAS 02524+2046 as well as arcsecond-scale radio properties of this galaxy using VLA archive data. We found that there is no significant detection of radio continuum emission from VLBI observations. The arcsecond-scale radio images of this source show no clear extended emission. The total radio flux density at L and C bands are approximately 2.9 mJy and 1.0 mJy, respectively, which indicates a steep radio spectral index between the two bands. A steep spectral index, low brightness temperature, and high q-ratio (i.e., the far-infrared to the radio flux density), which are three critical indicators in the classification of radio activity in the nuclei of galaxies, are all consistent with the classification of this source as a starburst galaxy from its optical spectrum. The high-resolution line profile reveals that we detected both the 1665 MHz and 1667 MHz OH maser lines, which show two and three clear components, respectively. The channel maps show that the maser emission are distributed in a region of similar to 210 pc x 90 pc. The detected maser components in different regions indicate similar double spectral features, which might be evidence that this galaxy is at a stage of major merger as seen from the optical morphology.
Keywordgalaxies: active radio lines: galaxies galaxies: starburst radio continuum: galaxies
Funding OrganizationNSFC ; NSFC ; NSFC ; NSFC ; NSFC ; NSFC ; NSFC ; NSFC
Funding ProjectNSFC[11763002] ; NSFC[U1931203] ; NSFC[11590780] ; NSFC[11590784]
Funding OrganizationNSFC ; NSFC ; NSFC ; NSFC ; NSFC ; NSFC ; NSFC ; NSFC
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000542609800001
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Document Type期刊论文
Corresponding AuthorWu, Zhongzu
Affiliation1.Guizhou Univ, Coll Phys, Guiyang 550025, Peoples R China
2.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China
3.Nanjing Univ, Sch Astron & Space Sci, 22 Hankou Rd, Nanjing 210093, Peoples R China
4.GuangZhou Univ, Ctr Astrophys, Guangzhou 510006, Peoples R China
5.Russian Acad Sci, Special Astrophys Observ, Nizhnii Arkhyz 369167, Russia
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Peng, Hao,Wu, Zhongzu,Zhang, Bo,et al. Radio properties of the OH megamaser galaxy IRAS 02524+2046[J]. ASTRONOMY & ASTROPHYSICS,2020,638:11.
APA Peng, Hao.,Wu, Zhongzu.,Zhang, Bo.,Chen, Yongjun.,Zheng, Xingwu.,...&Sotnikova, Yu, V.(2020).Radio properties of the OH megamaser galaxy IRAS 02524+2046.ASTRONOMY & ASTROPHYSICS,638,11.
MLA Peng, Hao,et al."Radio properties of the OH megamaser galaxy IRAS 02524+2046".ASTRONOMY & ASTROPHYSICS 638(2020):11.
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