Host galaxy of low-luminosity compact sources

被引:2
作者
Vietri, A. [1 ,2 ]
Berton, M. [2 ]
Jarvela, E. [3 ,4 ,12 ]
Kunert-Bajraszewska, M. [5 ]
Ciroi, S. [1 ]
Varglund, I. [6 ,7 ]
Dalla Barba, B. [2 ,8 ,9 ]
Sani, E. [2 ]
Crepaldi, L. [1 ,2 ,10 ,11 ]
机构
[1] Univ Padua, Dipartimento Fis & Astron G Galilei, Vicolo Osservatorio 3, I-35122 Padua, Italy
[2] European Southern Observ, Alonso Cordova 3107,Casilla 19, Santiago 19001, Chile
[3] Univ Oklahoma, Homer L Dodge Dept Phys & Astron, 440 W Brooks St, Norman, OK 73019 USA
[4] European Space Agcy ESA, European Space Astron Ctr ESAC, Camino Bajo Castillo S-N, E-28692 Madrid, Spain
[5] NCU, Inst Astron, Fac Phys Astron & Informat, Grudzidzka 5-7, PL-87100 Torun, Poland
[6] Aalto Univ, Metsahovi Radio Observ, Metsahovintie 114, FI-02540 Kylmala, Finland
[7] Aalto Univ, Dept Elect & Nanoengn, POB 15500, FI-00076 Aalto, Finland
[8] Univ Insubria, Dipartimento Sci & Alta Tecnol, Via Valleggio 11, I-22100 Como, Italy
[9] Ist Nazl Astrofis INAF, Osservatorio Astron Brera, I-23807 Merate, Italy
[10] INAF Osservatorio Astron Cagliari, Via Sci 5, I-09047 Selargius, Italy
[11] Univ La Serena, Dept Fis & Astron, Ave Cisternas 1200 N, La Serena, Chile
[12] Univ Oklahoma, Norman, OK USA
基金
美国国家科学基金会; 美国国家航空航天局;
关键词
galaxies: active; galaxies: jets; galaxies: Seyfert; SEYFERT; 1; GALAXIES; DIGITAL SKY SURVEY; ACTIVE GALACTIC NUCLEI; BLACK-HOLE GROWTH; STEEP-SPECTRUM; RADIO-SOURCES; STAR-FORMATION; PARENT POPULATION; MAIN-SEQUENCE; AGN;
D O I
10.1051/0004-6361/202449247
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The term 'active galactic nuclei' (AGN) is applied to a huge variety of objects, classified on the basis of their properties at different wavelengths. Peaked sources (PSs) represent a class of AGN at the first stage of evolution, characterised by a peaked radio spectrum. Among these radio sources, low-luminosity compact (LLC) sources can be identified as PSs accreting with a high Eddington rate, harbouring low-power jets, and hosting low-mass black holes. These properties are also shared by narrow-line Seyfert 1 galaxies (NLS1s). In 2016, LLCs were hypothesised to be the parent population of NLS1s with a flat radio spectrum (F-NLS1s), suggesting that the former may be the same objects as the latter but, instead, seen at a higher inclination. Based on radio luminosity functions and optical spectra analysis, ten LLCs were identified as valid F-NLS1s candidates. To account for the missing piece to the puzzle and verifying whether these LLCs could be hosted in late-type galaxies as NLS1s, we performed a photometric decomposition of their Pan-STARRS1 images in all five filters. We used the 2D fitting algorithm GALFIT for the single-band analysis and its extension GALFITM for the multi-band analysis. Considering that the morphological type and the structural parameters of the host may be dependent on the wavelength, we found six out of ten LLCs hosted in late-type galaxies, probably with pseudo-bulges, along with three point-like sources and one object of an uncertain classification. Although this study is based on a small sample, it represents the first morphological analysis of LLC host galaxies. These results confirm the trend observed in NLS1s, indicating late-type and disc-like host galaxies for LLCs and supporting the validity of the parent population scenario.
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页数:15
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