Zobrazeno 1 - 10
of 133
pro vyhledávání: '"Taft, E. A."'
Autor:
Rafelski, Marc, Wolfe, Arthur M., Cooke, Jeff, Chen, Hsiao-Wen, Armandroff, Taft E., Wirth, Gregory D.
Publikováno v:
Astrophysical Journal 703 (2009) 2033-2050
We present a sample of 407 z~3 Lyman break galaxies (LBGs) to a limiting isophotal u-band magnitude of 27.6 mag in the Hubble Ultra Deep Field (UDF). The LBGs are selected using a combination of photometric redshifts and the u-band drop-out technique
Externí odkaz:
http://arxiv.org/abs/0908.0343
Publikováno v:
Astron.J. 129 (2005) 2232
(Abridged) We present the results of variable star searches of the M31 dwarf spheroidal companions Andromeda I and Andromeda III using the Hubble Space Telescope. A total of 100 variable stars were found in Andromeda I, while 56 were found in Androme
Externí odkaz:
http://arxiv.org/abs/astro-ph/0501083
Publikováno v:
Astron.J. 127 (2004) 318
(abridged) We present the results of a variable star search in Andromeda II, a dwarf spheroidal galaxy companion to M31, using HST/WFPC2 observations. Seventy-three variables were found, one of which is an anomalous Cepheid while the others are RR Ly
Externí odkaz:
http://arxiv.org/abs/astro-ph/0310620
Publikováno v:
Astron.J. 124 (2002) 1464
We have surveyed Andromeda VI, a dwarf spheroidal galaxy companion to M31, for variable stars using F450W and F555W observations obtained with the Hubble Space Telescope. A total of 118 variables were found, with 111 being RR Lyrae, 6 anomalous Cephe
Externí odkaz:
http://arxiv.org/abs/astro-ph/0205361
Publikováno v:
Astronomical Journal, 123, 2511 (2002)
This article studies the structure of the Draco dwarf spheroidal galaxy with an emphasis on the question of whether the spatial distribution of its stars has been affected by the tidal interaction with the Milky Way, using R- and V-band CCD photometr
Externí odkaz:
http://arxiv.org/abs/astro-ph/0201297
Autor:
Kim, Sang Chul, Lee, Myung Gyoon, Geisler, Doug, Sarajedini, Ata, Armandroff, Taft E., Da Costa, Gary S.
We present the surface photometry of star clusters in the nearby dwarf elliptical galaxies NGC 185 and NGC 205, obtained from deep HST WFPC2 F555W (V) and F814W (I) images. We have obtained surface brightness and color profiles of six star clusters i
Externí odkaz:
http://arxiv.org/abs/astro-ph/0109218
Publikováno v:
Astron.J. 121 (2001) 841
We report R- and V-band photometry derived from CCD imaging for objects in nine fields in and around the Draco dwarf spheroidal galaxy. The most distant fields are about 1.3 degrees from the center. We use these data to search for Draco stars outside
Externí odkaz:
http://arxiv.org/abs/astro-ph/0011006
Publikováno v:
A.J., 120, 3102 (2000)
HST (V,I) photometry has been obtained for the inner halo globular cluster NGC 6652. The photometry reaches approximately 4 mag below the turn-off and includes a well populated horizontal branch. This cluster is located close to the Galactic center a
Externí odkaz:
http://arxiv.org/abs/astro-ph/0008434
Autor:
Burris, Debra L., Pilachowski, Catherine A., Armandroff, Taft E., Sneden, Christopher, Cowan, John J., Roe, Henry
Publikováno v:
Astrophys.J. 544 (2000) 302-319
New abundances for neutron-capture (n-capture) elements in a large sample of metal-poor giants from the Bond survey are presented. The spectra were acquired with the KPNO 4-m echelle and coude feed spectrographs, and have been analyzed using LTE fine
Externí odkaz:
http://arxiv.org/abs/astro-ph/0005188
A Survey for Low Surface Brightness Galaxies Around M31. II. The Newly Discovered Dwarf Andromeda VI
Publikováno v:
Astron.J. 118 (1999) 1220
We present B-, V-, and I-band images, as well as an H alpha image, of And VI. This is the second newly identified dwarf spheroidal (dSph) companion to M31 found using a digital filtering technique applied to the second Palomar Sky Survey for which 15
Externí odkaz:
http://arxiv.org/abs/astro-ph/9905237