Zobrazeno 1 - 10
of 2 207
pro vyhledávání: '"Johnstone D."'
Autor:
Maureira, M. J., Pineda, J. E., Liu, H. B., Testi, L., Segura-Cox, D., Chandler, C., Johnstone, D., Caselli, P., Sabatini, G., Aikawa, Y., Bianchi, E., Codella, C., Cuello, N., Fedele, D., Friesen, R., Loinard, L., Podio, L., Ceccarelli, C., Sakai, N., Yamamoto, S.
Publikováno v:
A&A 689, L5 (2024)
When the planet formation process begins in the disks surrounding young stars is still an open question. Annular substructures such as rings and gaps in disks are intertwined with planet formation, and thus their presence or absence is commonly used
Externí odkaz:
http://arxiv.org/abs/2407.20074
Autor:
Murillo, N. M., Fuchs, C. M., Harsono, D., Sakai, N., Hacar, A., Johnstone, D., Mignon-Risse, R., Zeng, S., Hsieh, T. -H., Yang, Y. -L., Tobin, J. J., Persson, M. V.
Publikováno v:
A&A 689, A267 (2024)
Protostellar multiplicity is common at all stages and mass ranges. However, the factors that determine the multiplicity of protostellar systems have not been systematically characterized through their molecular gas. Nobeyama 45m Radio Observatory OTF
Externí odkaz:
http://arxiv.org/abs/2407.14702
Autor:
Podio, L., Ceccarelli, C., Codella, C., Sabatini, G., Segura-Cox, D., Balucani, N., Rimola, A., Ugliengo, P., Chandler, C. J., Sakai, N., Svoboda, B., Pineda, J., De Simone, M., Bianchi, E., Caselli, P., Isella, A., Aikawa, Y., Bouvier, M., Caux, E., Chahine, L., Charnley, S. B., Cuello, N., Dulieu, F., Evans, L., Fedele, D., Feng, S., Fontani, F., Hama, T., Hanawa, T., Herbst, E., Hirota, T., Jiménez-Serra, I., Johnstone, D., Lefloch, B., Gal, R. Le, Loinard, L., Liu, H. Baobab, López-Sepulcre, A., Maud, L. T., Maureira, M. J., Menard, F., Miotello, A., Moellenbrock, G., Nomura, H., Oba, Y., Ohashi, S., Okoda, Y., Oya, Y., Sakai, T., Shirley, Y., Testi, L., Vastel, C., Viti, S., Watanabe, N., Watanabe, Y., Zhang, Y., Zhang, Z. E., Yamamoto, S.
Publikováno v:
A&A 688, L22 (2024)
Recent observations suggest that planets formation starts early, in protostellar disks of $\le10^5$ yrs, which are characterized by strong interactions with the environment, e.g., through accretion streamers and molecular outflows. To investigate the
Externí odkaz:
http://arxiv.org/abs/2407.04813
Autor:
Eden, D. J., Liu, Tie, Moore, T. J. T., Di Francesco, J., Fuller, G., Kim, Kee-Tae, Li, Di, Liu, S. -Y., Plume, R., Tatematsu, Ken'ichi, Thompson, M. A., Wu, Y., Bronfman, L., Butner, H. M., Currie, M. J., Garay, G., Goldsmith, P. F., Hirano, N., Johnstone, D., Juvela, M., Lai, S. -P., Lee, C. W., Mannfors, E. E., Olguin, F., Pattle, K., Park, Geumsook, Polychroni, D., Rawlings, M., Rigby, A. J., Sanhueza, P., Traficante, A., Urquhart, J. S., Weferling, B., White, G. J., Yadav, R. K.
We have investigated the physical properties of Planck Galactic Cold Clumps (PGCCs) located in the Galactic Plane, using the JCMT Plane Survey (JPS) and the SCUBA-2 Continuum Observations of Pre-protostellar Evolution (SCOPE) survey. By utilising a s
Externí odkaz:
http://arxiv.org/abs/2405.00493
Autor:
De Simone, M., Podio, L., Chahine, L., Codella, C., Chandler, C. J., Ceccarelli, C., Lopez-Sepulcre, A., Loinard, L., Svoboda, B., Sakai, N., Johnstone, D., Menard, F., Aikawa, Y., Bouvier, M., Sabatini, G., Miotello, A., Vastel, C., Cuello, N., Bianchi, E., Caselli, P., Caux, E., Hanawa, T., Herbst, E., Segura-Cox, D., Zhang, Z., Yamamoto, S.
Publikováno v:
A&A 686, L13 (2024)
Context. Understanding the connection between outflows, winds, accretion and disks in the inner protostellar regions is crucial for comprehending star and planet formation process. Aims. We aim to we explore the inner 300 au of the protostar IRAS 4A2
Externí odkaz:
http://arxiv.org/abs/2404.19690
Autor:
Sabatini, G., Podio, L., Codella, C., Watanabe, Y., De Simone, M., Bianchi, E., Ceccarelli, C., Chandler, C. J., Sakai, N., Svoboda, B., Testi, L., Aikawa, Y., Balucani, N., Bouvier, M., Caselli, P., Caux, E., Chahine, L., Charnley, S., Cuello, N., Dulieu, F., Evans, L., Fedele, D., Feng, S., Fontani, F., Hama, T., Hanawa, T., Herbst, E., Hirota, T., Isella, A., Jímenez-Serra, I., Johnstone, D., Lefloch, B., Gal, R. Le, Loinard, L., Liu, H. Baobab, López-Sepulcre, A., Maud, L. T., Maureira, M. J., Menard, F., Miotello, A., Moellenbrock, G., Nomura, H., Oba, Y., Ohashi, S., Okoda, Y., Oya, Y., Pineda, J., Rimola, A., Sakai, T., Segura-Cox, D., Shirley, Y., Vastel, C., Viti, S., Watanabe, N., Zhang, Y., Zhang, Z. E., Yamamoto, S.
The origin of the chemical diversity observed around low-mass protostars probably resides in the earliest history of these systems. We aim to investigate the impact of protostellar feedback on the chemistry and grain growth in the circumstellar mediu
Externí odkaz:
http://arxiv.org/abs/2403.18108
Autor:
Codella, C., Podio, L., De Simone, M., Ceccarelli, C., Ohashi, S., Chandler, C. J., Sakai, N., Pineda, J. E., Segura-Cox, D. M., Bianchi, E., Cuello, N., López-Sepulcre, A., Fedele, D., Caselli, P., Charnley, S., Johnstone, D., Zhang, Z. E., Maureira, M. J., Zhang, Y., Sabatini, G., Svoboda, B., Jiménez-Serra, I., Loinard, L., Mercimek, S., Murillo, N., Yamamoto, S.
The ALMA interferometer has played a key role in revealing a new component of the Sun-like star forming process: the molecular streamers, i.e. structures up to thousands of au long funneling material non-axisymmetrically to disks. In the context of t
Externí odkaz:
http://arxiv.org/abs/2402.10258
Autor:
Cacciapuoti, L., Macias, E., Maury, A. J., Chandler, C. J., Sakai, N., Tychoniec, Ł., Viti, S., Natta, A., De Simone, M., Miotello, A., Codella, C., Ceccarelli, C., Podio, L., Fedele, D., Johnstone, D., Shirley, Y., Liu, B. J., Bianchi, E., Zhang, Z. E., Pineda, J., Loinard, L., Ménard, F., Lebreuilly, U., Klessen, R. S., Hennebelle, P., Molinari, S., Testi, L., Yamamoto, S.
Publikováno v:
A&A 676, A4 (2023)
Early dust grain growth in protostellar envelopes infalling on young discs has been suggested in recent studies, supporting the hypothesis that dust particles start to agglomerate already during the Class 0/I phase of young stellar objects (YSOs). If
Externí odkaz:
http://arxiv.org/abs/2306.02852
Autor:
Burns, R. A., Uno, Y., Sakai, N., Blanchard, J., Rosli, Z., Orosz, G., Yonekura, Y., Tanabe, Y., Sugiyama, K., Hirota, T., Kim, Kee-Tae, Aberfelds, A., Volvach, A. E., Bartkiewicz, A., Garatti, A. Caratti o, Sobolev, A. M., Stecklum, B., Brogan, C., Phillips, C., Ladeyschikov, D. A., Johnstone, D., Surcis, G., MacLeod, G. C., Linz, H., Chibueze, J. O., Brand, J., Eislöffel, J., Hyland, L., Uscanga, L., Olech, M., Durjasz, M., Bayandina, O., Breen, S., Ellingsen, S. P., Heever, S. P. van den, Hunter, T. R., Chen, X.
High-mass protostars (M$_{\star} >$ 8 M$_{\odot}$) are thought to gain the majority of their mass via short, intense bursts of growth. This episodic accretion is thought to be facilitated by gravitationally unstable and subsequently inhomogeneous acc
Externí odkaz:
http://arxiv.org/abs/2304.14740
Autor:
Mercimek, S., Podio, L., Codella, C., Chahine, L., López-Sepulcre, A., Ohashi, S., Loinard, L., Johnstone, D., Menard, F., Cuello, N., Caselli, P., Zamponi, J., Aikawa, Y., Bianchi, E., Busquet, G., Pineda, J. E., Bouvier, M., De Simone, M., Zhang, Y., Sakai, N., Chandler, C. J., Ceccarelli, C., Alves, F., Durán, A., Fedele, D., Murillo, N., Jiménez-Serra, I., Yamamoto, S.
More than 50% of solar-mass stars form in multiple systems. It is therefore crucial to investigate how multiplicity affects the star and planet formation processes at the protostellar stage. We report continuum and C$^{18}$O (2-1) observations of the
Externí odkaz:
http://arxiv.org/abs/2303.16257