Results 111 to 120 of about 12,786 (266)

Little Bear’s pulsating stars: Variable star census of UMi dSph Galaxy

EPJ Web of Conferences, 2017
Recent observations and a photometric search for variable stars in the Ursa Minor dwarf spheroidal galaxy (UMi dSph) are presented. Our observations were taken at Apache Point Observatory in 2014 and 2016 using the 0.5m ARCSAT telescope and the West ...
Kinemuchi K., Jeffery E., Kuehn C., Grabowski K., Nemec J.   +4 more
doaj   +1 more source

The ability of intermediate-band Stromgren photometry to correctly identify dwarf, subgiant, and giant stars and provide stellar metallicities and surface gravities

, 2010
[Abridged] Several large scale photometric and spectroscopic surveys are being undertaken to provide a more detailed picture of the Milky Way. Given the necessity of generalisation in the determination of, e.g., stellar parameters when tens and hundred ...
A. S. Árnadóttir, Abazajian, Adén, Adén, Alonso, Alonso, Anthony-Twarog, Anthony-Twarog, Arce, Arellano Ferro, Beers, Bell, Bensby, Bond, Bond, Bonfils, Bonifacio, Calamida, Calamida, Carney, Carollo, Chen, Clausen, Clem, Cohen, Cousins, Crawford, Crawford, Edvardsson, Faria, Favata, Feltzing, Ferguson, Flynn, Gilmore, Grebel, Grundahl, Grønbech, Gustafsson, Gustafsson, Haywood, Heiter, Helmi, Hilker, Holmberg, I. Lundström, Ibata, Ivezic, Johnson, Jønch-Sørensen, Kirby, Kotoneva, Landolt, Lee, Lester, Luck, Malyuto, Martell, Martell, Mermilliod, Mishenina, Nissen, Nordström, Ochsenbein, Olsen, Olsen, Olsen, Olsen, Olsen, Olsen, Perry, Perryman, Ramírez, Ramírez, Ramírez, S. Feltzing, Santos, Santos, Santos, Schlegel, Schuster, Schuster, Schuster, Schuster, Schuster, Schuster, Sousa, Strigari, Strömgren, Strömgren, Thorén, Twarog, Twarog, Valenti, van Leeuwen, Vandenberg, VandenBerg, von Hippel, von Hippel, Woolf, Yasuda, Yong, York, Önehag   +103 more
core   +1 more source

Elemental Abundances in And XIX from Coadded Spectra

The Astrophysical Journal
With a luminosity similar to that of Milky Way dwarf spheroidal systems like Sextans, but a spatial extent similar to that of ultra-diffuse galaxies, Andromeda (And) XIX is an unusual satellite of M31. To investigate the origin of this galaxy, we measure
L. R. Cullinane, Karoline M. Gilbert, Ivanna Escala, J. Leigh Wojno, Evan N. Kirby, Kateryna A. Kvasova, Erik Tollerud, Michelle L. M. Collins, R. Michael Rich   +8 more
doaj   +1 more source

Constraining branon dark matter from observations of the dwarf spheroidal galaxies with the MAGIC telescopes [PDF]

, 2022
Tjark Miener, D. Nieto, V. Gammaldi, D. Kerszberg, J. Rico   +4 more
openalex   +1 more source

Modeling wave dark matter in dwarf spheroidal galaxies

Journal of Physics: Conference Series, 2015
22 pages, 10 figures, 3 ...
Bray, Hubert L., Parry, Alan R.
openaire   +2 more sources

Machine Learning Techniques to Distinguish Giant Stars from Dwarf Stars Using Only Photometry—Pushing Redward

The Astronomical Journal
We present our photometric method, which combines Subaru/Hyper Suprime-Cam N B 515, g -band, and i- band filters to distinguish giant stars in Local Group galaxies from Milky Way dwarf contamination.
Keyi Ding, Carrie Filion, Rosemary F.G. Wyse, Evan N. Kirby, Itsuki Ogami, Masashi Chiba, Yutaka Komiyama, László Dobos, Alexander S. Szalay   +8 more
doaj   +1 more source

Implications of elemental abundances in dwarf spheroidal galaxies [PDF]

Astronomy & Astrophysics, 2006
Unusual elemental abundance patterns observed for stars belonging to nearby dwarf spheroidal (dSph) galaxies are discussed. Analysis of the [alpha/H] vs. [Fe/H] diagrams where alpha represents Mg or average of alpha-elements reveals that Fe from Type Ia supernovae (SNe Ia) does not contribute to the stellar abundances in the dSph galaxies where the ...
openaire   +2 more sources

Chemical Properties of Star-Forming Emission Line Galaxies at z=0.1 - 0.5

, 1998
We measure oxygen and nitrogen abundances for 14 star-forming emission line galaxies (ELGs) at 0 ...
Bender R., Davies J. I., Dennis Zaritsky, Edmunds M. G., Henry A. Kobulnicky, Howarth I. D., Hummer D. G., Larson R. B., Lequeux J., Madau P., Mateo M., Pagel B. E. J., Pagel B. E. J., Pagel B. E. J., Pagel B. E. J., Renzini A., Rix H. W., Schneider D. P., Seaton M. J., Telles E., Telles E., Terlevich R., van Zee L.   +22 more
core   +3 more sources

Why Are There Dwarf Spheroidal Galaxies?

The Astrophysical Journal, 2001
4 ApJ pages, submitted to ApJ ...
openaire   +2 more sources

Dark Matter And The Habitability of Planets

, 2012
In many models, dark matter particles can elastically scatter with nuclei in planets, causing those particles to become gravitationally bound. While the energy expected to be released through the subsequent annihilations of dark matter particles in the ...
Hooper, Dan, Steffen, Jason H.
core   +1 more source