Zobrazeno 1 - 10
of 98
pro vyhledávání: '"Hartmann, Lee W."'
Autor:
Bonilla-Barroso, Andrea, Ballesteros-Paredes, J., Hernández, Jesus, Aguilar, Luis, Zamora, Manuel, Hartmann, Lee W., Kuznetsova, Aleksandra, Camacho, Vianey, Lora, Verónica
Using numerical simulations of the formation and evolution of stellar clusters within molecular clouds, we show that the stars in clusters formed within collapsing molecular cloud clumps exhibit a constant velocity dispersion regardless of their mass
Externí odkaz:
http://arxiv.org/abs/2201.11286
Autor:
Zamora-Avilés, Manuel, Vázquez-Semadeni, Enrique, González, Ricardo F., Franco, José, Shore, Steven N., Hartmann, Lee W., Ballesteros-Paredes, Javier, Banerjee, Robi, Körtgen, Bastian
We present radiation-magnetohydrodynamic simulations aimed at studying evolutionary properties of H\,{\normalsize II} regions in turbulent, magnetised, and collapsing molecular clouds formed by converging flows in the warm neutral medium. We focus on
Externí odkaz:
http://arxiv.org/abs/1903.01644
We analyse the morphology and kinematics of dense filamentary structures produced in a numerical simulation of a star--forming cloud of $1.4 \times 10^4 \, \Msun$ evolving under their own self--gravity in a magnetized medium. This study is motivated
Externí odkaz:
http://arxiv.org/abs/1708.01669
We report on a series of numerical simulations of gas clouds with self-gravity forming sink particles, adopting an isothermal equation of state to isolate the effects of gravity from thermal physics on the resulting sink mass distributions. Simulatio
Externí odkaz:
http://arxiv.org/abs/1506.02591
Autor:
Ortiz-León, Gisela N., Loinard, Laurent, Mioduszewski, Amy J., Dzib, Sergio A., Rodríguez, Luis F., Pech, Gerardo, Rivera, Juana, Torres, Rosa M., Boden, Andrew, Hartmann, Lee W., Evans, Neal J., Briceño II, Cesar, Tobin, John J., Kounkel, Marina A., González-Lópezlira, Rosa A.
We present deep ($\sim 17~\mu$Jy) radio continuum observations of the Serpens molecular cloud, the Serpens south cluster, and the W40 region obtained using the Very Large Array in its A configuration. We detect a total of 146 sources, 29 of which are
Externí odkaz:
http://arxiv.org/abs/1503.03904
Autor:
Loinard, Laurent, Zapata, Luis A., Rodriguez, Luis F., Pech, Gerardo, Chandler, Claire J., Brogan, Crystal L., Wilner, David J., Ho, Paul T. P., Parise, Berengere, Hartmann, Lee W., Zhu, Zhaohuan, Takahashi, Satoko, Trejo, Alfonso
We present ALMA and VLA observations of the molecular and ionized gas at 0.1-0.3 arcsec resolution in the Class 0 protostellar system IRAS 16293-2422. These data clarify the origins of the protostellar outflows from the deeply embedded sources in thi
Externí odkaz:
http://arxiv.org/abs/1211.4744
Autor:
Ballesteros-Paredes, Javier, Vazquez-Semadeni, Enrique, Gazol, Adriana, Hartmann, Lee W., Heitsch, Fabian, Colin, Pedro
It has been recently shown that molecular clouds do not exhibit a unique shape for the column density probability distribution function (Npdf). Instead, clouds without star formation seem to possess a lognormal distribution, while clouds with active
Externí odkaz:
http://arxiv.org/abs/1105.5411
Autor:
Ballesteros-Paredes, Javier, Hartmann, Lee W., Vázquez-Semadeni, Enrique, Heitsch, Fabian, Zamora-Avilés, Manuel A.
We discuss the nature of the velocity dispersion vs. size relation for molecular clouds. In particular, we add to previous observational results showing that the velocity dispersions in molecular clouds and cores are not purely functions of spatial s
Externí odkaz:
http://arxiv.org/abs/1009.1583
Publikováno v:
Astrophys.J.697:1020-1031,2009
Motivated by kinematic observations of young embedded clusters, this paper explores possible kinematic signatures produced by asphericity and departures from initial virial equilibrium in these systems. Specifically, the kinematic quantity that is me
Externí odkaz:
http://arxiv.org/abs/0903.3242
Autor:
Furesz, Gabor, Hartmann, Lee W., Megeath, S. Thomas, Szentgyorgyi, Andrew H., Hamden, Erika T.
We present results from 1351 high resolution spectra of 1215 stars in the Orion Nebula Cluster (ONC) and the surrounding Orion 1c association, obtained with the Hectochelle multiobject echelle spectrograph on the 6.5m MMT. We confirmed 1111 stars as
Externí odkaz:
http://arxiv.org/abs/0711.0391