Zobrazeno 1 - 10
of 56
pro vyhledávání: '"Kunkel, William E."'
Autor:
Frinchaboy, Peter M., Majewski, Steven R., Munoz, Ricardo R., Law, David R., Lokas, Ewa L., Kunkel, William E., Patterson, Richard J., Johnston, Kathryn V.
We have assembled a large-area spectroscopic survey of giant stars in the Sagittarius (Sgr) dwarf galaxy core. Using medium resolution (R ~15,000), multifiber spectroscopy we have measured velocities of these stars, which extend up to 12 degrees from
Externí odkaz:
http://arxiv.org/abs/1207.3346
Autor:
Majewski, Steven R., Nidever, David L., Smith, Verne V., Damke, Guillermo J., Kunkel, William E., Patterson, Richard J., Bizyaev, Dmitry, Perez, Ana E. Garcia
We present the latitude-normalized radial velocity (vb) distribution of 3318 subsolar metallicity, V<13.5 stars from the Grid Giant Star Survey (GGSS) in Southern Hemisphere fields. The sample includes giants mostly within ~5 kpc from the Galactic di
Externí odkaz:
http://arxiv.org/abs/1202.1832
Autor:
Nidever, David L., Majewski, Steven R., Munoz, Ricardo R., Beaton, Rachael L., Patterson, Richard J., Kunkel, William E.
The Magellanic Clouds are a local laboratory for understanding the evolution and properties of dwarf irregular galaxies. To reveal the extended structure and interaction history of the Magellanic Clouds we have undertaken a large-scale photometric an
Externí odkaz:
http://arxiv.org/abs/1104.2594
Autor:
Munoz, Ricardo R., Majewski, Steven R., Zaggia, Simone, Kunkel, William E., Frinchaboy, Peter M., Nidever, David L., Crnojevic, Denija, Patterson, Richard J., Crane, Jeffrey D., Johnston, Kathryn V., Sohn, Sangmo Tony, Bernstein, Rebecca, Shectman, Stephen
Publikováno v:
Astrophys.J.649:201-223,2006
A new large-area Washington M,T_2+DDO51 filter survey of more than 10 deg^2 around the Carina dSph galaxy reveals a spectroscopically confirmed power law radial density "break" population of Carina giant stars extending several degrees beyond the cen
Externí odkaz:
http://arxiv.org/abs/astro-ph/0605098
Publikováno v:
Astrophys.J.636:L85-L88,2006
Star counts, obtained from a 2 x 2 degree area centered on NGC 6822 have revealed an optical image of this galaxy composed of two components: in addition to the well-known HI disk with its young stellar component, there is a spheroidal stellar struct
Externí odkaz:
http://arxiv.org/abs/astro-ph/0510778
Autor:
Frinchaboy, Peter M., Munoz, Ricardo R., Phelps, Randy L., Majewski, Steven R., Kunkel, William E.
Publikováno v:
Astron.J.131:922-938,2006
It has been previously proposed that some distant open clusters in the Milky Way may have been accreted during a dwarf galaxy merger, perhaps associated with the same event that led to the formation of the Galactic anticenter stellar structure (GASS)
Externí odkaz:
http://arxiv.org/abs/astro-ph/0509742
Autor:
Westfall, Kyle B., Majewski, Steven R., Ostheimer, James C., Frinchaboy, Peter M., Kunkel, William E., Patterson, Richard J., Link, Robert
Publikováno v:
Astron.J.131:375-406,2006
(Abridged) We explore the spatial distribution of stars in the Sculptor dwarf spheroidal (dSph) galaxy over an area of 7.82 deg^2. We identify red giant branch (RGB) starts via Washington M, T_2+DDO51 photometry and a blue horizontal branch (BHB) pop
Externí odkaz:
http://arxiv.org/abs/astro-ph/0508091
Autor:
Sugerman, Ben E. K., Crotts, Arlin P. S., Kunkel, William E., Heathcote, Stephen R., Lawrence, Stephen S.
Publikováno v:
Astrophys.J.Suppl.159:60-99,2005
We present the detailed construction and analysis of the most complete map to date of the circumstellar environment around SN 1987A, using ground and space-based imaging from the past 16 years. PSF-matched difference-imaging analyses of data from 198
Externí odkaz:
http://arxiv.org/abs/astro-ph/0502378
Autor:
Sugerman, Ben E. K., Crotts, Arlin P. S., Kunkel, William E., Heathcote, Stephen R., Lawrence, Stephen S.
Publikováno v:
Astrophys.J. 627 (2005) 888-903
We summarize the analysis of a uniform set of both previously-known and newly-discovered scattered-light echoes, detected within 30" of SN 1987A in ten years of optical imaging, and with which we have constructed the most complete three-dimensional m
Externí odkaz:
http://arxiv.org/abs/astro-ph/0502268
Autor:
Majewski, Steven R., Kunkel, William E., Law, David R., Patterson, Richard J., Polak, Allyson A., Rocha-Pinto, Helio J., Crane, Jeffrey D., Frinchaboy, Peter M., Hummels, Cameron B., Johnston, Kathryn V., Rhee, Jaehyon, Skrutskie, Michael F., Weinberg, Martin
Publikováno v:
Astrophys.J. 619 (2005) 800-806; Astrophys.J. 619 (2005) 807-823
We present moderate resolution (~6 km/s) spectroscopy of 284 M giant candidates selected from the Two Micron All Sky Survey photometry. Radial velocities (RVs) are presented for stars mainly in the south, with a number having positions consistent wit
Externí odkaz:
http://arxiv.org/abs/astro-ph/0403701