GOALS-JWST: Mid-infrared Spectroscopy of the Nucleus of NGC 7469
Artikel i vetenskaplig tidskrift, 2023
We present mid-infrared spectroscopic observations of the nucleus of the nearby Seyfert galaxy NGC 7469 taken with the MIRI instrument on the James Webb Space Telescope (JWST) as part of Directors Discretionary Time Early Release Science program 1328. The high-resolution nuclear spectrum contains 19 emission lines covering a wide range of ionization. The high-ionization lines show broad, blueshifted emission reaching velocities up to 1700 km s−1 and FWHM ranging from ∼500 to 1100 km s−1. The width of the broad emission and the broad-to-narrow line flux ratios correlate with ionization potential. The results suggest a decelerating, stratified, AGN-driven outflow emerging from the nucleus. The estimated mass outflow rate is 1-2 orders of magnitude larger than the current black hole accretion rate needed to power the AGN. Eight pure rotational H2 emission lines are detected with intrinsic widths ranging from FWHM ∼125 to 330 km s−1. We estimate a total mass of warm H2 gas of ∼1.2 × 107 M ⊙ in the central 100 pc. The PAH features are extremely weak in the nuclear spectrum, but a 6.2 μm PAH feature with an equivalent width of ∼0.07 μm and a flux of 2.7 × 10−17 W m−2 is detected. The spectrum is steeply rising in the mid-infrared, with a silicate strength of ∼0.02, significantly smaller than seen in most PG QSOs but comparable to other Seyfert 1s. These early MIRI mid-infrared IFU data highlight the power of JWST to probe the multiphase interstellar media surrounding actively accreting supermassive black holes.
Författare
Lee Armus
California Institute of Technology (Caltech)
Thomas Lai
California Institute of Technology (Caltech)
U. Vivian
University of California at Irvine (UCI)
K. Larson
Space Telescope Science Institute (STScI)
T. Diaz-Santos
European University Cyprus
Idryma Technologias kai Erevnas (FORTH)
Aaron S. Evans
National Radio Astronomy Observatory
University of Virginia
M. A. Malkan
University of California
Jeffrey A. Rich
Carnegie Observatories
Anne M. Medling
University of Toledo
ARC Centre of Excellence for All-sky Astrophysics
David R. Law
Space Telescope Science Institute (STScI)
H. Inami
Hiroshima University
Francisco Muller-Sanchez
University of Memphis
V. Charmandaris
Panepistimio Kritis
Idryma Technologias kai Erevnas (FORTH)
European University Cyprus
P. V.D. van der Werf
Universiteit Leiden
S. Stierwalt
Occidental College
S. T. Linden
University of Massachusetts
G. Privon
University of Florida
National Radio Astronomy Observatory
Loreto Barcos-Munoz
University of Virginia
Christopher C. Hayward
Flatiron Institute
Y. Song
National Radio Astronomy Observatory
University of Virginia
P. Appleton
California Institute of Technology (Caltech)
Susanne Aalto
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
Thomas Bohn
Hiroshima University
T. Boker
Europeiska rymdorganisationen (ESA)
Michael J.I. Brown
Monash University
Luke Finnerty
University of California
Justin Howell
California Institute of Technology (Caltech)
K. Iwasawa
Institucio Catalana de Recerca i Estudis Avancats
Universitat de Barcelona
F. Kemper
Institucio Catalana de Recerca i Estudis Avancats
Consejo Superior de Investigaciones Científicas (CSIC)
J. P. Marshall
Glendale Community College
J. Mazzarella
California Institute of Technology (Caltech)
Jed McKinney
University of Massachusetts
Eric J. Murphy
National Radio Astronomy Observatory
David Sanders
University of Hawaii
J. A. Surace
California Institute of Technology (Caltech)
Astrophysical Journal Letters
2041-8205 (ISSN) 2041-8213 (eISSN)
Vol. 942 2 L37Ämneskategorier (SSIF 2011)
Subatomär fysik
Astronomi, astrofysik och kosmologi
Atom- och molekylfysik och optik
DOI
10.3847/2041-8213/acac66