On the Dynamical Evolution of Young Stellar Aggregates

• Autorzy: Wiśniowski T. , Rickman H. , Wajer P.

Identyfikatory

DOI

10.32023/0001-5237/71.3.4

• Języki publikacji: EN

Abstrakty

EN

We report on N-body simulations of embedded stellar clusters over a time span of 10 Myr from inception until several crossing times after gas expulsion. We focus our attention on the survivability of bound stellar clusters following gas expulsion. The final values of the bound fraction are significantly larger in case the initial structure is relatively open with a Plummer radius of ≈1 pc than for a much stronger degree of concentration. However, only one of 12 simulated clusters shows any promise of leaving behind a long-lived, bound system. We tentatively conclude that the predictions of our model are in rough agreement with the observed "infant mortality" of newborn stellar aggregates. We also find that relaxation effects due to close encounters, while present, are significantly curtailed by the rapid expansion of the clusters.

Słowa kluczowe

EN

stars: kinematics; stars: dynamics; open clusters: general; associations: general

• Wydawca: Copernicus Foundation for Polish Astronomy
• Czasopismo: Acta Astronomica
• Rocznik: 2021
• Tom: Vol. 71, No. 3
• Strony: 243--260
• Opis fizyczny: Bibliogr. 30 poz., tab., wykr.

Twórcy

autor

Wiśniowski T.

• Centrum Badań Kosmicznych Polskiej Akademii Nauk, Bartycka 18A, 00-716, Warszawa, Poland

autor

Rickman H.

• Centrum Badań Kosmicznych Polskiej Akademii Nauk, Bartycka 18A, 00-716, Warszawa, Poland
• Department of Physics and Astronomy, Uppsala University, Box 516, SE-75120, Uppsala, Sweden

autor

Wajer P.

• Centrum Badań Kosmicznych Polskiej Akademii Nauk, Bartycka 18A, 00-716, Warszawa, Poland

Bibliografia

• Battinelli, P., and Capuzzo-Dolcetta, R. 1991, MNRAS, 249, 76.
• Baumgardt, H., De Marchi, G., and Kroupa, P. 2008, ApJ, 685, 247.
• Belloni, D., Kroupa. P., Rocha-Pinto, H.J., and Giersz, M. 2018, MNRAS, 474, 3740.
• Binney, J., and Tremaine, S. 1987, “Galactic Dynamics”, Princeton University. Press.
• Brasser, R., Duncan, M.J., Levison, H.F., Schwamb, M.E., and Brown, M.E. 2012, Icarus, 217, 1.
• Brinkmann, N., Banerjee, S., Motwani, B., and Kroupa, P. 2017, A&A, 600, A49.
• Domínguez, R., Fellhauer, M., Blaña, M., Farias, J.P., and Dabringhausen, J. 2017, MNRAS, 472, 465.
• Elmegreen, B.G., and Clemens, C. 1985, ApJ, 294, 523.
• Farias, J.P., Smith, R., Fellhauer, M., et al. 2015, MNRAS, 450, 2451.
• Farias, J.P., Fellhauer, M., Smith, R., Domínguez, R., and Dabringhausen, J. 2018, MNRAS, 476, 5341.
• Goddard, Q.E., Bastian, N., and Kennicutt, R.C. 2010, MNRAS, 405, 857.
• Gutermuth, R.A., Megeath, S.T., Myers, P.C., Allen, L.E., Pipher, J.L., and Fazio, G.G. 2009, ApJS, 184, 18.
• Hernquist, L. 1990, ApJ, 356, 359.
• Hurley, J.R., Pols, O.R., and Tout, C.A. 2000, MNRAS, 315, 543.
• Hurley, J.R., Tout, C.A., and Pols, O.R. 2002, MNRAS, 329, 897.
• Jijina, J., Myers, P.C., and Adams, F.C. 1999, ApJS, 125, 161.
• Klessen, R.S., Heitsch, F., and Mac Low, M.-M. 2000, ApJ, 535, 887.
• Kroupa, P. 1995, MNRAS, 277, 1507.
• Kroupa, P. 2001, MNRAS, 322, 231.
• Küpper, A.H.W., Maschberger, T., Kroupa, P., and Baumgardt, H. 2011, MNRAS, 417, 2300.
• Miller, G.E., and Scalo, J.M. 1979, ApJS, 41, 513.
• Morbidelli, A., and Nesvorný, D. 2020, in: ”The Trans-Neptunian Solar System”, Eds. D. Prialnik, M.A. Barucci, L. Young, Elsevier, p. 25.
• Oh, S., and Kroupa, P. 2016, A&A, 590, A107.
• Piskunov, A.E., Kharchenko, N.V., Röser, S., Schilbach, E., and Scholz, D.E. 2006, A&A, 445, 545.
• Plummer, H.C. 1911, MNRAS, 71, 460.
• Proszkow, E.-M., and Adams, F.C. 2009, ApJSuppl., 185, 486.
• Sills, A., Rieder, S., Scora, J., McCloskey, J., and Jaffa, S. 2018, MNRAS, 477, 1903.
• Shukirgaliyev, B., Parmentier, G., Berczik, P., and Just, A. 2019, MNRAS, 486, 1045.
• Wang, L., Spurzem, R., Aarseth, et al. 2015, MNRAS, 450, 4070.
• Wiśniowski, T., Rickman, H., and Wajer, P. 2021, MNRAS, submitted.

Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023)