Zobrazeno 1 - 10
of 73
pro vyhledávání: '"McCall, Marshall L"'
Autor:
Ivkovich, Nina, McCall, Marshall L.
The placement of early-type dwarf galaxies (dSphs and dEs) with respect to the Potential Plane defined by pressure-supported late-type dwarf galaxies (dIs and BCDs) has been determined from surface brightness profiles. dEs and the most luminous dSphs
Externí odkaz:
http://arxiv.org/abs/1903.10141
Akademický článek
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Autor:
McCall, Marshall L.
It is demonstrated that the Local Sheet is both geometrically and dynamically distinct from the Local Supercluster and that the evolution of the Sheet and Local Group were probably interconnected. The Sheet is inclined by 8 degrees with respect to th
Externí odkaz:
http://arxiv.org/abs/1403.3667
Autor:
Dack, Stuart, McCall, Marshall L.
Publikováno v:
2012, ApJ, 750, 167
Studying the global evolution of spiral galaxies requires determining their overall chemical compositions. However, since spirals tend to possess gradients in their chemical compositions, determining their overall chemical abundances poses a challeng
Externí odkaz:
http://arxiv.org/abs/1204.1744
Autor:
McCall, Marshall L., Vaduvescu, O., Nunez, F. Pozo, Dominguez, A. Barr, Fingerhut, R., Unda-Sanzana, E., Li, Bintao, Albrecht, M.
Publikováno v:
2012, A&A, 540, 49
Star-forming dwarfs are studied to elucidate the physical underpinnings of their fundamental plane. It is confirmed that residuals in the Tully-Fisher relation are correlated with surface brightness, but that even after accommodating the surface brig
Externí odkaz:
http://arxiv.org/abs/1204.1074
We present chemical abundances for planetary nebulae in M32, NGC 185, and NGC 205 based upon spectroscopy obtained at the Canada-France-Hawaii Telescope using the Multi-Object Spectrograph. From these and similar data compiled from the literature for
Externí odkaz:
http://arxiv.org/abs/0805.3669
Publikováno v:
Astrophys.J.658:328-336,2007
We present chemical abundances for planetary nebulae and H II regions in the Local Group dwarf irregular galaxy NGC 6822 based upon spectroscopy obtained at the Canada-France-Hawaii Telescope using the Multi-Object Spectrograph. From these and simila
Externí odkaz:
http://arxiv.org/abs/astro-ph/0611833
Publikováno v:
Astrophys.J.655:814-830,2007
We have obtained spectra of HII regions in the heavily obscured spiral galaxy Maffei 2. The observations have allowed for a determination of the Galactic extinction of this galaxy using a correlation between extinction and hydrogen column density obs
Externí odkaz:
http://arxiv.org/abs/astro-ph/0610044
Publikováno v:
Astron.J.130:1593-1626,2005
A sample of 34 dwarf irregular galaxies in the Local Volume, most nearer than 5 Mpc, has been imaged in the near-infrared (NIR) in J and K_s at CFHT in Hawaii and OAN-SPM in Mexico. In CFHT images, stars brighter than M_Ks=-7.5 were resolved. In most
Externí odkaz:
http://arxiv.org/abs/astro-ph/0506706
Autor:
Vaduvescu, Ovidiu, McCall, Marshall L.
Despite much work, the connection between dwarf elliptical galaxies (dEs) and dwarf irregulars (dIs) remains unclear. Recently, we found that the surface brightness profiles (SBPs) of dIs in the near-infrared can be well fitted with a hyperbolic seca
Externí odkaz:
http://arxiv.org/abs/astro-ph/0504385