Herschel/PACS OH Spectroscopy of Seyfert, LINER, and Starburst Galaxies
| Autor: | J. A. Fernández-Ontiveros, Matthew A. Malkan, Luigi Spinoglio, Jordan N. Runco, Miguel Pereira-Santaella |
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| Přispěvatelé: | Runco, J. N. [0000-0003-4852-8958], Malkan, M. A. [0000-0001-6919-1237], Fernández Ontiveros, J. A. [0000-0001-9490-899X], Spinoglio, L. [0000-0001-8840-1551], Pereira Santaella, M. [0000-0002-4005-9619], Agenzia Spaziale Italiana (ASI), STFC, Comunidad de Madrid through Atraccion de Talento Investigador, Unidad de Excelencia Científica María de Maeztu Centro de Astrobiología del Instituto Nacional de Técnica Aeroespacial y CSIC, MDM-2017-0737, Science and Technology Facilities Council (STFC), Comunidad de Madrid, National Aeronautics and Space Administration (NASA) |
| Rok vydání: | 2020 |
| Předmět: |
Active galactic nucleus
astro-ph.GA Infrared Galaxies Extinction (astronomy) FOS: Physical sciences Astrophysics Astronomy & Astrophysics Galaxy counts Stellar classification Atomic 01 natural sciences 010305 fluids & plasmas symbols.namesake Particle and Plasma Physics 0103 physical sciences Radiative transfer Nuclear Spectroscopy 010303 astronomy & astrophysics Luminous infrared galaxy Physics Seyfert galaxies Molecular Balmer series Astronomy and Astrophysics Astrophysics - Astrophysics of Galaxies Galaxy High resolution spèctroscopy 13. Climate action Space and Planetary Science Astrophysics of Galaxies (astro-ph.GA) symbols Active Galaxies Astronomical and Space Sciences Physical Chemistry (incl. Structural) |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname DIGITAL.INTA Repositorio Digital del Instituto Nacional de Técnica Aeroespacial Instituto Nacional de Técnica Aeroespacial (INTA) ASTROPHYSICAL JOURNAL, vol 905, iss 1 |
| Popis: | We investigated the 65, 71, 79, 84, 119, and 163 μm OH doublets of 178 local (0 < z < 0.35) galaxies. They were observed using the Herschel/Photoconductor Array Camera and Spectrometer, including Seyfert galaxies, low-ionization nuclear emission-line regions, and star-forming galaxies. We observe these doublets exclusively in absorption (OH71), primarily in absorption (OH65, OH84), mostly in emission (OH79), only in emission (OH163), and an approximately even mix of the both (OH119). In 19 galaxies we find P Cygni or reverse P Cygni line profiles in the OH doublets. We use several galaxy observables to probe spectral classification, brightness of a central active galactic nucleus (AGN)/starburst component, and radiation field strength. We find that OH79, OH119, and OH163 are more likely to display strong emission for bright, unobscured AGNs. For less luminous, obscured AGNs and nonactive galaxies, we find populations of strong absorption (OH119), weaker emission (OH163), and a mix of weak emission and weak absorption (OH79). For OH65, OH71, and OH84, we do not find significant correlations with the observables listed above. For OH79 and OH119, we find relationships with both the 9.7 μm silicate feature and Balmer decrement dust extinction tracers in which more dust leads to weaker emission/stronger absorption. The origin of emission for the observed OH doublets, whether from collisional excitation or from radiative pumping by infrared photons, is discussed. With funding from the Spanish government through the "María de Maeztu Unit of Excellence" accreditation (MDM-2017-0737) |
| Databáze: | OpenAIRE |
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