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Paper   IPM / Astronomy / 17743
School of Astronomy
  Title:   Constraining millimeter dust emission in nearby galaxies with NIKA2: The case of NGC2146 and NGC2976
1.  G. Ejlali
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.  F. Galliano
21.  A. Gomez
22.  J. Goupy
23.  A.P. Jones
24.  C. Hanser
25.  A. Hughes
26.  S. Katsioli
27.  F. Keruzore
28.  C. Kramer
29.  B. Ladjelate
30.  G. Lagache
31.  S. Leclercq
32.  J.-F. Lestrade
33.  J.F. Macias-Perez
34.  S.C. Madden
35.  A. Maury
36.  P. Mauskopf
37.  F. Mayet
38.  A. Monfardini
39.  A. Moyer-Anin
40.  M. Munoz-Echeverria
41.  A. Nersesian
42.  L. Pantoni
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
  Supported by:  IPM
This study presents the first millimeter continuum mapping observations of two nearby galaxies, the starburst spiral galaxy NGC2146 and the dwarf galaxy NGC2976, at 1.15 mm and 2 mm using the NIKA2 camera on the IRAM 30m telescope, as part of the Guaranteed Time Large Project IMEGIN. These observations provide robust resolved information about the physical properties of dust in nearby galaxies by constraining their FIR-radio SED in the millimeter domain. After subtracting the contribution from the CO line emission, the SEDs are modeled spatially using a Bayesian approach. Maps of dust mass surface density, temperature, emissivity index, and thermal radio component of the galaxies are presented, allowing for a study of the relations between the dust properties and star formation activity (using observations at 24�???�??�?�¼m as a tracer). We report that dust temperature is correlated with star formation rate in both galaxies. The effect of star formation activity on dust temperature is stronger in NGC2976, an indication of the thinner interstellar medium of dwarf galaxies. Moreover, an anti-correlation trend is reported between the dust emissivity index and temperature in both galaxies.

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