To understand the evolution of dust properties in molecular clouds in the course of the star formation process, we constrain the changes in the dust emissivity index from star-forming filaments to prestellar and protostellar cores to T Tauri stars. Using the NIKA2 continuum camera on the IRAM 30 m telescope. we observed the Taurus B211/B2I3 filament at 1.2 mm and 2 mm with unprecedented sensitivity and used the resulting maps to derive the dust emissivity index beta. Our sample of 105 objects detected in the beta map of the B211/B213 filament indicates that, overal. beta decreases from filament and prestellar cores (beta similar to 2 +/- 0.5) to protostellar cores (beta similar to 1.2 +/- 0.2) to T-Tauri protoplanetary disk (beta < I). The averaged dust emissivity index beta across the B211/B2I3 filament exhibits a flat (beta similar to 2 +/- 0.3) profile. This may imply that dust grain sizes are rather homogeneous in the filament, start to grow significantly in size only after the onset of the gravitational
NIKA2 observations of dust grain evolution from star-forming filament to T-Tauri disk. Preliminary results from NIKA2 observations of the Taurus B211/B213 filament / Nguyen-Luong, Q; Adam, R; Ade, P; Ajeddig, H; André, P; Artis, E; Aussel, H; Beelen, A; Benoît, A; Berta, S; Bing, L; Bourrion, O; Calvo, M; Catalans, A; De Petris, M; Désert, Fx; Doyle, S; Driessen, Efc; Ejlali, G; Gomez, A; Goupy, J; Hanser, C; Katsioli, S; Kéruzoré, F; Kramer, C; Ladjelate, B; Lagache, G; Leclercq, S; Lestrade, Jf; Macías-Pérez, Jf; Madden, Sc; Maury, A; Mauskopf', P; Mayet, F; Monfardini, A; Moyer-Anin, A; Muñoz-Echeyerría, M; Perotto, L; Pisano, G; Ponthieu, N; Revéret, V; Rigby, Aj; Ritacco, A; Romero, C; Roussel, H; Ruppin, F; Schuster, K; Sievers, A; Tucker, C; Zylka, R; Bacmann, A; Duong-Tuan, A; Peretto, N; Rigby, A. - In: EPJ WEB OF CONFERENCES. - ISSN 2100-014X. - 293:(2024), pp. 1-7. (Intervento presentato al convegno Observing the Universe at MM wavelengths, MM Universe 2023 tenutosi a Grenoble, France) [10.1051/epjconf/202429300035].
NIKA2 observations of dust grain evolution from star-forming filament to T-Tauri disk. Preliminary results from NIKA2 observations of the Taurus B211/B213 filament
De Petris, M;Pisano, G;
2024
Abstract
To understand the evolution of dust properties in molecular clouds in the course of the star formation process, we constrain the changes in the dust emissivity index from star-forming filaments to prestellar and protostellar cores to T Tauri stars. Using the NIKA2 continuum camera on the IRAM 30 m telescope. we observed the Taurus B211/B2I3 filament at 1.2 mm and 2 mm with unprecedented sensitivity and used the resulting maps to derive the dust emissivity index beta. Our sample of 105 objects detected in the beta map of the B211/B213 filament indicates that, overal. beta decreases from filament and prestellar cores (beta similar to 2 +/- 0.5) to protostellar cores (beta similar to 1.2 +/- 0.2) to T-Tauri protoplanetary disk (beta < I). The averaged dust emissivity index beta across the B211/B2I3 filament exhibits a flat (beta similar to 2 +/- 0.3) profile. This may imply that dust grain sizes are rather homogeneous in the filament, start to grow significantly in size only after the onset of the gravitational| File | Dimensione | Formato | |
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