ReveaLLAGN 0: First look at JWST MIRI data of Sombrero and NGC 1052

Goold, Kameron, Seth, Anil, Molina, Mallory, Ohlson, David, Runnoe, Jessie C., Boker, Torsten, Davis, Timothy A. ORCID: https://orcid.org/0000-0003-4932-9379, Dumont, Antoine, Eracleous, Michael, Fernandez-Ontiveros, Juan Antonio, Gallo, Elena, Goulding, Andy D., Greene, Jenny E., Ho, Luis C., Markoff, Sera B., Neumayer, Nadine, Plotkin, Richard M., Prieto, Almudena, Satyapal, Shobita, van de Ven, Glenn, Walsh, Jonelle L., Yuan, Feng, Feldmeier-Krause, Anja, Gultekin, Kayhan, Honig, Sebastian, Kirkpatrick, Allison, Lutzgendorf, Nora, Reines, Amy E., Strader, Jay, Trump, Jonathan R. and Voggel, Karina T. 2024. ReveaLLAGN 0: First look at JWST MIRI data of Sombrero and NGC 1052. Astrophysical Journal 966 , 204. 10.3847/1538-4357/ad3065

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Abstract

We present the first results from the Revealing Low-Luminosity Active Galactic Nuclei (ReveaLLAGN) survey, a JWST survey of seven nearby LLAGNs. We focus on two observations with the Mid-Infrared Instrument (MIRI)'s Medium-Resolution Spectrometer of the nuclei of NGC 1052 and Sombrero (NGC 4594/M104). We also compare these data to public JWST data of higher-luminosity AGNs, NGC 7319 and NGC 7469. JWST clearly separates the AGN spectrum from the galaxy light even in Sombrero, the faintest target in our survey; the AGN components have very red spectra. We find that the emission-line widths in both NGC 1052 and Sombrero increase with increasing ionization potential, with FWHM > 1000 km s−1 for lines with ionization potential ≳ 50 eV. These lines are also significantly blueshifted in both LLAGNs. The high-ionization-potential lines in NGC 7319 show neither broad widths nor significant blueshifts. Many of the lower-ionization-potential emission lines in Sombrero show significant blue wings extending >1000 km s−1. These features and the emission-line maps in both galaxies are consistent with outflows along the jet direction. Sombrero has the lowest-luminosity high-ionization-potential lines ([Ne v] and [O iv]) ever measured in the mid-infrared, but the relative strengths of these lines are consistent with higher-luminosity AGNs. On the other hand, the [Ne v] emission is much weaker relative to the [Ne iii] and [Ne ii] lines of higher-luminosity AGNs. These initial results show the great promise that JWST holds for identifying and studying the physical nature of LLAGNs.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Publisher:	American Astronomical Society
ISSN:	0004-637X
Date of First Compliant Deposit:	8 March 2024
Date of Acceptance:	28 February 2024
Last Modified:	09 May 2024 15:26
URI:	https://orca.cardiff.ac.uk/id/eprint/167032

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