A Quick Look at the 3 GHz Radio Sky. II. Hunting for DRAGNs in the VLA Sky Survey
| Autor: | Yjan A. Gordon, Lawrence Rudnick, Heinz Andernach, Leah K. Morabito, Christopher P. O’Dea, Kaylan-Marie Achong, Stefi A. Baum, Caryelis Bayona-Figueroa, Eric J. Hooper, Beatriz Mingo, Melissa E. Morris, Adrian N. Vantyghem |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | The Astrophysical Journal Supplement Series, Vol 267, Iss 2, p 37 (2023) |
| Druh dokumentu: | article |
| ISSN: | 1538-4365 0067-0049 |
| DOI: | 10.3847/1538-4365/acda30 |
| Popis: | Active galactic nuclei (AGNs) can often be identified in radio images as two lobes, sometimes connected to a core by a radio jet. This multicomponent morphology unfortunately creates difficulties for source finders, leading to components that are (a) separate parts of a wider whole, and (b) offset from the multiwavelength cross identification of the host galaxy. In this work we define an algorithm, DRAGN hunter , for identifying double radio sources associated with AGNs (DRAGNs) from component catalog data in the first epoch Quick Look images of the high-resolution (≈3″ beam size) Very Large Array Sky Survey (VLASS). We use DRAGN hunter to construct a catalog of >17,000 DRAGNs in VLASS for which contamination from spurious sources is estimated at ≈11%. A “high-fidelity” sample consisting of 90% of our catalog is identified for which contamination is |
| Databáze: | Directory of Open Access Journals |
| Externí odkaz: |
|