Zobrazeno 1 - 10
of 150
pro vyhledávání: '"Worthey, G."'
Autor:
Lee, H. -c., Worthey, G., Dotter, A., Chaboyer, B., Jevremovic, D., Baron, E., Briley, M. M., Ferguson, J. W., Coelho, P., Trager, S. C.
Publikováno v:
Astrophys.J.694:902-923,2009
The first paper in this series explored the effects of altering the chemical mixture of the stellar population on an element by element basis on stellar evolutionary tracks and isochrones to the end of the red giant branch. This paper extends the dis
Externí odkaz:
http://arxiv.org/abs/0812.1563
Autor:
Dotter, A., Chaboyer, B., Ferguson, J. W., Lee, H. -c., Worthey, G., Baron, E., Jevremovic, D.
Publikováno v:
Astrophys.J.666:403-412,2007
Integrated light from distant galaxies is often compared to stellar population models via the equivalent widths of spectral features--spectral indices--whose strengths rely on the abundances of one or more elements. Such comparisons hinge not only on
Externí odkaz:
http://arxiv.org/abs/0706.0808
Autor:
Shao, M., Marcy, G., Unwin, S., Allen, R., Beichman, C., Catanzarite, J., Chaboyer, B., Ciardi, D., Edberg, S. J., Gallagher, D., Gould, A., Henry, T., Johnston, K., Kulkarni, S., Law, N., Majewski, S., Marr, J., Pan, X., Shaklan, S., Shaya, E., Tanner, A., Tomsick, J., Wehrle, A., Worthey, G.
The past two Decadal Surveys in Astronomy and Astrophysics recommended the completion of a space-based interferometry mission, known today as SIM PlanetQuest, for its unique ability to detect and characterize nearby rocky planets (Bahcall 1991, McKee
Externí odkaz:
http://arxiv.org/abs/0704.0952
Autor:
Hao, H., Stanek, K. Z., Dobrzycki, A., Matheson, T., Bentz, M. C., Kuraszkiewicz, J., Garnavich, P. M., Howk, J. C., Calkins, M. L., Worthey, G., Modjaz, M., Serven, J.
We report on the discovery of strongly variable FeII and MgII absorption lines seen at z=1.48 in the spectra of the z=4.05 GRB 060206 obtained between 4.13 to 7.63 hours (observer frame) after the burst. In particular, the FeII line equivalent width
Externí odkaz:
http://arxiv.org/abs/astro-ph/0612409
Autor:
Block, D. L., Puerari, I., Fazio, G. G., Stockton, A., Canalizo, G., Freeman, K. C., Jarrett, T. H., Combes, F., Groess, Robert, Worthey, G., Gehrz, R. D., Woodward, C. E., Polomski, Elisha F.
The Triangulum Spiral Galaxy Messier 33 offers unique insights into the building of a galactic disk. We identify spectacular arcs of intermediate age (0.6 Gyr - 2 Gyr) stars in the low-metallicity outer disk. The northern arc spans approx. 120 degree
Externí odkaz:
http://arxiv.org/abs/astro-ph/0610575
Autor:
Worthey, G., Lee, H. -c.
Publikováno v:
Astrophys.J.Suppl.193:1,2011
A collection of Johnson/Cousins photometry for stars with known [Fe/H] is used to generate color-color relations that include the abundance dependence. Literature temperature and bolometric correction dependences are attached to the color relations.
Externí odkaz:
http://arxiv.org/abs/astro-ph/0604590
Autor:
Stanek, K. Z., Dai, X., Prieto, J. L., An, D., Garnavich, P. M., Calkins, M. L., Serven, J., Worthey, G., Hao, H., Dobrzycki, A., Howk, C., Matheson, T.
Publikováno v:
Astrophys.J.654:L21-L24,2006
We report on two recent z~4 gamma-ray bursts (GRBs), GRB 060206 and GRB 060210, for which we have obtained well-sampled optical light curves. Our data, combined with early optical data reported in the literature, shows unusual behavior for both after
Externí odkaz:
http://arxiv.org/abs/astro-ph/0602495
Asteroids can be eclipsed by other bodies in the Solar System, but no direct observation of an asteroid eclipse has been reported to date. We describe a statistical method to predict an eclipse for an asteroid based on the analysis of the orbital ele
Externí odkaz:
http://arxiv.org/abs/astro-ph/0509830
Autor:
Block, D. L., Freeman, K. C., Jarrett, T. H., Puerari, I., Worthey, G., Combes, F., Groess, R.
Publikováno v:
Astron.Astrophys. 425 (2004) L37-L40
Stars with masses in the range from about 1.3 to 3.5 Mo pass through an evolutionary stage where they become carbon stars. In this stage, which lasts a few Myr, these stars are extremely luminous pulsating giants. They are so luminous in the near-inf
Externí odkaz:
http://arxiv.org/abs/astro-ph/0406485
Publikováno v:
Astron.J. 120 (2000) 165-188
We analyze single-stellar-population (SSP) equivalent parameters for 50 local elliptical galaxies as a function of their structural parameters. These galaxies fill a two-dimensional plane in the four-dimensional space of [Z/H], log t, log $\sigma$, a
Externí odkaz:
http://arxiv.org/abs/astro-ph/0004095