Zobrazeno 1 - 10
of 20
pro vyhledávání: '"Hartmann, L. W."'
Publikováno v:
Astrophys.J.695:248-258,2009
We present a set of numerical simulations addressing the effects of magnetic field strength and orientation on the flow-driven formation of molecular clouds. Fields perpendicular to the flows sweeping up the cloud can efficiently prevent the formatio
Externí odkaz:
http://arxiv.org/abs/0812.3339
Autor:
McClure, M. K., Forrest, W. J., Sargent, B. A., Watson, Dan M., Furlan, E., Manoj, P., Luhman, K. L., Calvet, N., Espaillat, C., D'Alessio, P., Hartmann, L. W., Tayrien, C., Harrold, S. T.
Publikováno v:
McClure, M.K., et al. 2008, ApJL, 683, L187
We present the Spitzer Infrared Spectrograph (IRS) spectrum of SR20, a 5--10 AU binary T Tauri system in the $\rho$ Ophiuchi star forming region. The spectrum has features consistent with the presence of a disk; however, the continuum slope is steepe
Externí odkaz:
http://arxiv.org/abs/0801.0402
Autor:
Navascues, D. Barrado y, Stauffer, J. R., Morales-Calderon, M., Bayo, A., Fazzio, G., Megeath, T., Allen, L., Hartmann, L. W., Calvet, N.
Publikováno v:
Astrophys.J.664:481-500,2007
We present multi-wavelength optical and infrared photometry of 170 previously known low mass stars and brown dwarfs of the 5 Myr Collinder 69 cluster (Lambda Orionis). The new photometry supports cluster membership for most of them, with less than 15
Externí odkaz:
http://arxiv.org/abs/0704.1963
Autor:
Sicilia-Aguilar, Aurora, Hartmann, L. W., Watson, Dan, Bohac, Chris, Henning, Thomas, Bouwman, Jeroen
Publikováno v:
Astrophys.J.659:1637-1660,2007
We present the Spitzer IRS spectra for 33 young stars in Tr 37 and NGC 7160. The sample includes the high- and intermediate-mass stars with MIPS 24 microns excess, the only known active accretor in the 12 Myr-old cluster NGC 7160, and 19 low-mass sta
Externí odkaz:
http://arxiv.org/abs/astro-ph/0701321
Publikováno v:
Astrophys.J.648:1052-1065,2006
Molecular Cloud Complexes (MCCs) are highly structured and ``turbulent''. Observational evidence suggests that MCCs are dynamically dominated systems, rather than quasi-equilibrium entities. The observed structure is more likely a consequence of the
Externí odkaz:
http://arxiv.org/abs/astro-ph/0605435
Autor:
Telesco, C. M., Fisher, R. S., Pina, R. K., Knacke, R. F., Dermott, S. F., Wyatt, M. C., Grogan, K., Holmes, E. K., Ghez, A. M., Prato, L., Hartmann, L. W., Jayawardhana, R.
We present new 10.8 and 18.2 micron images of HR 4796A, a young A0V star that was recently discovered to have a spectacular, nearly edge-on, circumstellar disk prominent at ~20 microns (Jayawardhana et al. 1998; Koerner et al. 1998). These new images
Externí odkaz:
http://arxiv.org/abs/astro-ph/9909363
Publikováno v:
Publications of the Astronomical Society of the Pacific, 1991 Oct 01. 103(668), 1069-1076.
Externí odkaz:
https://www.jstor.org/stable/40679786
Autor:
LOCKWOOD, G. W., THOMPSON, D. T., RADICK, RICHARD R., OSBORN, W. H., BAGGETT, W. E., DUNCAN, D. K., HARTMANN, L. W.
Publikováno v:
Publications of the Astronomical Society of the Pacific, 1984 Sep 01. 96(583), 714-722.
Externí odkaz:
https://www.jstor.org/stable/40678394
Autor:
RADICK, RICHARD R., LOCKWOOD, G. W., THOMPSON, D. T., WARNOCK, A., HARTMANN, L. W., MIHALAS, DIMITRI, WORDEN, S. P., HENRY, GREGORY W., SHERLIN, JERRY M.
Publikováno v:
Publications of the Astronomical Society of the Pacific, 1983 Sep 01. 95(571), 621-634.
Externí odkaz:
https://www.jstor.org/stable/40678217
Autor:
Telesco, C. M., Fisher, R. S., Piña, R. K., Knacke, R. F., Dermott, S. F., Wyatt, M. C., Grogan, K., Holmes, E. K., Ghez, A. M., Prato, L., Hartmann, L. W., Jayawardhana, R.
Publikováno v:
Astrophysical Journal; 2/10/2000, Vol. 530 Issue 1, p329-341, 13p