J/A+A/707/A376 NGC 1365 MIRI images (Ceci+, 2026)
MIRACLE. II. Unveiling the multi-phase gas interplay in the circumnuclear region
of NGC 1365 via multicloud modeling.
Ceci M., Marconcini C., Marconi A., Feltre A., Lamperti I., Belfiore F.,
Bertola E., Bracci C., Carniani S., Cataldi E., Cresci G., D Amato Q.,
Fritz J., Ginolfi M., Hatziminaoglou E., Hirschmann M., Mingozzi M.,
Moreschini B., Mannucci F., Sabatini G., Salvestrini F., Scialpi M.,
Tozzi G., Ulivi L., Venturi G., Vidal-Garcia A., Vignali C., Zanchettin M.V.
<Astron. Astrophys. 707, A376 (2026)>
=2026A&A...707A.376C 2026A&A...707A.376C (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, Seyfert ; Infrared sources
Keywords: ISM: jets and outflows - ISM: kinematics and dynamics -
galaxies: active - galaxies: ISM - galaxies: nuclei -
galaxies: Seyfert
Abstract:
We present a multiphase study of the gas in the circumnuclear region
(∼0.9x0.9kpc2) of the nearby Seyfert 1.8 galaxy NGC 1365, observed
in the context of the Mid-IR Activity of Circumnuclear Line Emission
(MIRACLE) program. We combined spatially resolved spectroscopic
observations from JWST/MIRI, VLT/MUSE, and ALMA to investigate the
ionized atomic gas and the warm and cold molecular phases.
MIRI data revealed over 40 mid-IR emission lines from ionized and warm
molecular gas. Moment maps show that both cold and warm molecular gas
follow the rotation of the stellar disk along the circumnuclear ring.
The ionized gas displays flux and kinematic patterns that depend on
ionization potential (IP): low-IP species (≤25eV) trace the disk,
while higher-IP lines (up to ∼120eV) trace outflowing material.
The [OIII]5700 and [NeV]14 lines both trace the southeast nuclear
outflow cone. Additionally, [NeV]14 detects the northwest
counter-cone, obscured in the optical and thus invisible in
[OIII]5700. Mid-IR diagnostics, unlike optical ones, clearly reveal
the AGN as the primary ionization source in the nucleus. Emission from
high-IP species is spatially coincident with the ionization cones and
not with star-forming regions.
Using the [NeV]24/[NeV]14 ratio, we derive an electron density of
(750±440)cm-3, in agreement with values from the [SII] optical
doublet.
For the first time, we apply a fully self-consistent approach
combining advanced photoionization and kinematic models
(HOMERUN+MOKA3D) to constrain intrinsic outflow properties, overcoming
the limitations of simplified classical methods. Exploiting the
synergy of JWST/MIRI and VLT/MUSE, HOMERUN reproduces fluxes of over
60 emission lines from optical to mid-IR, disentangling AGN and star
formation contributions and yielding robust estimates of outflow mass,
geometry, and energetics.
Description:
MIRI IFU datacubes of NGC 1365, reduced following the procedure in
Appendix A.1. The datacube files are labeled following the MIRI
channel (Ch1-Ch4) and band designation (short, medium, long).
Objects:
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RA (2000) DE Designation(s)
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03 33 36.45 -36 08 26.3 NGC 1365 = AGC 22699
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 108 12 List of fits files
fits/* . 12 Individual fits files
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 9 F9.5 deg RAdeg Right Ascension of center (J2000)
10- 18 F9.5 deg DEdeg Declination of center (J2000)
20- 21 I2 --- Nx Number of pixels along X-axis
23- 24 I2 --- Ny Number of pixels along Y-axis
26 I1 --- Nz Number of HDU
28- 37 A10 "datime" Obs.date Observation date
39- 43 I5 Kibyte size Size of FITS file
45- 67 A23 --- FileName Name of FITS file, in subdirectory fits
69-108 A40 --- Title Title of the FITS file
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Acknowledgements:
Matteo Ceci, matteo.ceci(at)unifi.it
(End) Patricia Vannier [CDS] 10-Nov-2025