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Paper   IPM / Astronomy / 17741
School of Astronomy
  Title:   IAS/CEA Evolution of Dust in Nearby Galaxies (ICED): The spatially-resolved dust properties of NGC4254
1.  L. Pantoni
2.  R. Adam
3.  P. Ade
4.  H. Ajeddig
5.  P. Andre
6.  E. Artis
7.  H. Aussel
8.  M. Baes
9.  A. Beelen
10.  A. Benoit
11.  S. Berta
12.  L. Bing
13.  O. Bourrion
14.  M. Calvo
15.  A. Catalano
16.  M. De Petris
17.  F. -X. Desert
18.  S. Doyle
19.  E.F.C. Driessen
20.  G. Ejlali
21.  F. Galliano
22.  A. Gomez
23.  J. Goupy
24.  A.P. Jones
25.  C. Hanser
26.  A. Hughes
27.  S. Katsioli
28.  F. Keruzore
29.  C. Kramer
30.  B. Ladjelate
31.  G. Lagache
32.  S. Leclercq
33.  J.-F. Lestrade
34.  J.F. Macias-perez
35.  S.C. Madden
36.  A. Maury
37.  P. Mauskopf
38.  F. Mayet
39.  A. Monfardini
40.  A. Moyer-Anin
41.  A. Munoz-Echeverria
42.  A. Nersesian
43.  D. Paradis
44.  L. Perotto
45.  G. Pisano
46.  N. Ponthieu
47.  V. Reveret
48.  A.J. Rigby
49.  A. Ritacco
50.  C. Romero
51.  H. Roussel
52.  F. Ruppin
53.  K. Schuster
54.  A. Sievers
55.  M.W.S.L. Smith
56.  F.S. Tabatabaei
57.  J. Tedros
58.  C. Tucker
59.  E.M. Xilouris
60.  R. Zylka
  Status:   In Proceedings
  Proceeding: EDP Sciences, 2024
  Year:  2024
  Pages:   6
  Supported by:  IPM
We present the first preliminary results of the project ICED, focusing on the face-on galaxy NGC4254. We use the millimetre maps observed with NIKA2 at lRAM-30m. as part of the IMEGIN Guaranteed Time Large Program. and of a wide collection of ancillary data (multi-wavelength photometry and gas phase spectral lines) that are publicly available. We derive the global and local properties of interstellar dust grains through infrared-to-radio spectral energy distribution fitting, using the hierarchical Bayesian code HerBIE. which includes the grain properties of the state-of-the-art dust model. THEMIS. Our method allows us to get the following dust parameters: dust mass, average interstellar radiation field, and fraction of small grains. Also, it is effective in retrieving the intrinsic correlations between dust parameters and interstellar medium properties. We find an evident anti-correlation between the interstellar radiation field and the fraction of small grains in the centre of NGC4254. meaning that, at strong radiation field intensities, very small amorphous carbon grains are efficiently destroyed by the ultra-violet photons coming from newly formed stars, through photo-desorption and sublimation. We observe a flattening of the anti-correlation at larger radial distances, which may be driven by the steep metallicity gradient measured in NGC4254.

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