NIKA2 observations of starless cores in Taurus and Perseus

Kramer, C., Adam, R., Ade, P. ORCID: https://orcid.org/0000-0002-5127-0401, Ajeddig, H., André, P., Artis, E., Aussel, H., Beelen, A., Benoît, A., Berta, S., Bing, L., Bourrion, O., Calvo, M., Caselli, P., Catalano, A., De Petris, M., Désert, F.-X., Doyle, S. ORCID: https://orcid.org/0000-0002-9054-986X, Driessen, E.F.C., Ejlali, G., Fuente, A., Gomez, A., Goupy, J., Hanser, C., Katsioli, S., Kéruzoré, F., Ladjelate, B., Lagache, G., Leclercq, S., Lestrade, J.-F., Macías-Pérez, J. F., Madden, S.C., Maury, A., Mauskopf, P. ORCID: https://orcid.org/0000-0001-6397-5516, Mayet, F., Monfardini, A., Moyer-Anin, A., Muñoz-Echeverría, M., Navarro-Almaida, D., Perotto, L., Pisano, G., Ponthieu, N., Revéret, V., Rigby, A.J., Ritacco, A., Romero, C., Roussel, H., Ruppin, F., Schuster, K., Sievers, A., Tucker, C. ORCID: https://orcid.org/0000-0002-1851-3918 and Zylka, R. 2024. NIKA2 observations of starless cores in Taurus and Perseus. EPJ Web of Conferences 293 , 00027. 10.1051/epjconf/202429300027

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Abstract

Dusty starless cores play an important role in regulating the initial phases of the formation of stars and planets. In their interiors, dust grains coagulate and ice mantles form, thereby changing the millimeter emissivities and hence the ability to cool. We mapped four regions with more than a dozen cores in the nearby Galactic filaments of Taurus and Perseus using the NIKA2 camera at the IRAM 30-meter telescope. Combining the 1mm to 2mm flux ratio maps with dust temperature maps from Herschel allowed to create maps of the dust emissivity index β1,2 at resolutions of 2430 and 5600 a.u. in Taurus and Perseus, respectively. Here, we study the variation with total column densities and environment. β1,2 values at the core centers (Av =12 – 19 mag) vary significantly between ~ 1.1 and 2.3. Several cores show a strong rise of β1,2 from the outskirts at ~ 4 mag to the peaks of optical extinctions, consistent with the predictions of grain models and the gradual build-up of ice mantles on coagulated grains in the dense interiors of starless cores.

Item Type:	Article
Date Type:	Published Online
Status:	Published
Schools:	Physics and Astronomy
Publisher:	Società Italiana di Fisica
ISSN:	2100-014X
Date of First Compliant Deposit:	10 May 2024
Date of Acceptance:	28 March 2024
Last Modified:	03 Jun 2024 10:31
URI:	https://orca.cardiff.ac.uk/id/eprint/168843

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