Issue |
EPJ Web Conf.
Volume 293, 2024
mm Universe 2023 - Observing the Universe at mm Wavelengths
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Article Number | 00027 | |
Number of page(s) | 6 | |
DOI | https://doi.org/10.1051/epjconf/202429300027 | |
Published online | 28 March 2024 |
https://doi.org/10.1051/epjconf/202429300027
NIKA2 observations of starless cores in Taurus and Perseus
1 Institut de RadioAstronomie Millimétrique (IRAM), 38406 Saint Martin d’Hères, France
2 Université Côte d’Azur, Observatoire de la Côte d’Azur, CNRS, Laboratoire Lagrange, France
3 School of Physics and Astronomy, Cardiff University, CF24 3AA, UK
4 Université Paris-Saclay, Université Paris Cité, CEA, CNRS, AIM, 91191, Gif-sur-Yvette, France
5 Université Grenoble Alpes, CNRS, Grenoble INP, LPSC-IN2P3, 38000 Grenoble, France
6 Max Planck Institute for Extraterrestrial Physics, 85748 Garching, Germany
7 Aix Marseille Univ, CNRS, CNES, LAM, Marseille, France
8 Université Grenoble Alpes, CNRS, Institut Néel, France
9 Dipartimento di Fisica, Sapienza Università di Roma, I-00185 Roma, Italy
10 Univ. Grenoble Alpes, CNRS, IPAG, 38000 Grenoble, France
11 Institute for Research in Fundamental Sciences (IPM), Larak Garden, 19395-5531 Tehran, Iran
12 Centro de Astrobiología (CSIC-INTA), Torrejón de Ardoz, 28850 Madrid, Spain
13 National Observatory of Athens, IAASARS, GR-15236, Athens, Greece
14 Faculty of Physics, University of Athens, GR-15784 Zografos, Athens, Greece
15 High Energy Physics Division, Argonne National Laboratory, Lemont, IL 60439, USA
16 Instituto de Radioastronomía Milimétrica (IRAM), Granada, Spain
17 LERMA, Observatoire de Paris, PSL Research Univ., CNRS, Sorbonne Univ., UPMC, 75014 Paris, France
18 School of Earth & Space and Department of Physics, Arizona State University, AZ 85287, USA
19 School of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, UK
20 INAF-Osservatorio Astronomico di Cagliari, 09047 Selargius, Italy
21 LPENS, ENS, PSL Research Univ., CNRS, Sorbonne Univ., Université de Paris, 75005 Paris, France
22 Department of Physics and Astronomy, University of Pennsylvania, PA 19104, USA
23 Institut d’Astrophysique de Paris, CNRS (UMR7095), 75014 Paris, France
24 University of Lyon, UCB Lyon 1, CNRS/IN2P3, IP2I, 69622 Villeurbanne, France
* e-mail: kramer@iram.fr
Published online: 28 March 2024
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.
© The Authors, published by EDP Sciences, 2024
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