Results 21 to 30 of about 2,843 (308)

Spectroscopic characterization of the stellar content of ultra-diffuse galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2018
Understanding the peculiar properties of Ultra Diffuse Galaxies (UDGs) via spectroscopic analysis is a challenging task requiring very deep observations and exquisite data reduction. In this work we perform one of the most complete characterisations of the stellar component of UDGs to date using deep optical spectroscopic data from OSIRIS at GTC.
T Ruiz-Lara, M A Beasley, J Falcón-Barroso, J Román, F Pinna, C Brook, A Di Cintio, I Martín-Navarro, I Trujillo, A Vazdekis   +9 more
openaire   +3 more sources

Ionized Gas and Stellar Content in a Sample of HII Galaxies [PDF]

International Astronomical Union Colloquium, 1989
AbstractWe present the first results of an extensive study of the stellar content and the ionized gas structure for a sample of BCGs. Deep broad (BVRI Johnson) and narrow (Hα) CCD images have been obtained for about 25 galaxies. For a subset of objects, selected on the basis of their apparent structure, long-slit spectroscopy has also been obtained in ...
J. M. Vilchez, J. Cepa, C. Esteban
openaire   +1 more source

The Stellar Content of the Local Group Dwarf Galaxy Phoenix

The Astronomical Journal, 1999
We present new deep $VI$ ground-based photometry of the Local Group dwarf galaxy Phoenix. Our results confirm that this galaxy is mainly dominated by red stars, with some blue plume stars indicating recent (100 Myr old) star formation in the central part of the galaxy.
Martinez-Delgado, D, Gallart, C, Aparicio, A   +2 more
openaire   +6 more sources

Properties of Stellar Streams in the Galactic Disk

Open Astronomy, 2016
Stars of the Sirius, Coma Berenices, Hyades, Pleiades, Wolf 630, Dehnen 6, Dehnen 14, HR 1614, η Cephei, γ Leo streams, the newly identified two subgroups of the Hercules stream, and the streams BB 14, BB 17, BB 20, and BB 21 are selected using the ...
Marsakov V. A., Kovaľ V. V., Gozha M. L.   +2 more
doaj   +1 more source

Galaxy And Mass Assembly (GAMA): the wavelength-dependent sizes and profiles of galaxies revealed by MegaMorph [PDF]

, 2014
We investigate the relationship between colour and structure within galaxies using a large, volume-limited sample of bright, low-redshift galaxies with optical-near-infrared imaging from the Galaxy AndMass Assembly survey.We fit single-component ...
Loveday, J, Popescu, Cristina C., Vulcani, B., Graham, AW, Agius, NK, Baldry, I., Marina Vika (16220000), Simon Driver (2803993), Tuffs, RJ, Kelvin, L., Robotham, ASG, Robotham, A., Liske, J, Haeussler, Boris, Jonathan Loveday (4460899), Tuffs, R., Driver, S, Bamford, S. P., Nicola K Agius (16219928), Steven P Bamford (16070231), Agius, N., Jochen Liske (16219886), Popescu, Cristina, Bauer, A. E., Tuffs, Richard J., Brown, M. J. I., Rojas, Alex L., Benedetta Vulcani (16219994), Kelvin, Lee, Michael J I Brown (16219880), Rojas, A, Alex Rojas (1853125), Loveday, J., Alister W Graham (16219823), Rojas, Alex, Haussler, B., Boris Häußler (16219997), Vulcani, B, Häußler, Boris, Liske, J., Vika, Marina, Bauer, A., Robotham, A, Lee S Kelvin (16219820), Aaron S G Robotham (16219817), Brown, MJI, Loveday, Jon, Vika, M, Tuffs, R. J., Vulcani, Benedetta, Robotham, A. S. G., Bauer, A.E., Liske, Jochen, Haubler, B, Vika, M., Robotham, A.S.G., Graham, A. W., Baldry, I, Bamford, Steven, Bamford, S., Ivan Baldry (16219901), Tuffs, R, Graham, A., Cristina C Popescu (16219973), Agius, N. K., Kelvin, LS, Bamford, Steven P., Agius, N, Brown, Michael, Agius, N.K., Browne, William J.I., Driver, Simon, Popescu, CC, Driver, S., Baldry, Ivan K., Bauer, AE, Robotham, Aaron S. G., Popescu, C., Agius, Nicola K., Richard J Tuffs (16219979), Graham, Alister W., Bamford, SP, Kelvin, L. S., Rojas, A., Baldry, Ivan, Kelvin, Lee S., Graham, Alister, Bauer, Amanda E., Brown, M., Brown, Michael J. I., Bauer, A, Amanda E Bauer (16219964), Haeussler, B   +92 more
core   +1 more source

From Carbon to Cobalt: Chemical Compositions and Ages of z ∼ 0.7 Quiescent Galaxies

The Astrophysical Journal, 2023
We present elemental abundance patterns (C, N, Mg, Si, Ca, Ti, V, Cr, Fe, Co, and Ni) for a population of 135 massive quiescent galaxies at z ∼ 0.7 with ultra-deep rest-frame optical spectroscopy drawn from the LEGA-C survey.
Aliza G. Beverage, Mariska Kriek, Charlie Conroy, Nathan R. Sandford, Rachel Bezanson, Marijn Franx, Arjen van der Wel, Daniel R. Weisz   +7 more
doaj   +1 more source

Phenomenological distribution of dark matter halos of galaxy comprising of stellar streams [PDF]

, 2021
Using the potential associated with NFW mass profile (Navarro et al. in Mon. Not. R. Astron. Soc. 402:21, 2010) enclosed at scale radius rₛ, we calculate the partition function of the clustering of dark halos comprising of stellar streams, which are the ...
Rocca, Mario Carlos, Hameeda, Mir
core   +1 more source

Revisiting the Milky Way stellar long bar and the 3 kpc arm★

Astronomy & Astrophysics
Context. One of the most difficult and unexplored regions of the Milky Way is the highly extincted in-plane central region within the Galactic coordinates 10◦ ≲ |ℓ| ≲ 30◦, |b| ≲ 3◦, where we have the long-bar and 3 kpc arm with intermediate-age stellar ...
López-Corredoira M., Wu W., Wang H.-F., Garzón F.   +3 more
doaj   +1 more source

On the stellar content of the Carina dwarf spheroidal galaxy

, 2010
Accepted on PASP, 12 pages, 6 ...
Bono, Guillaume, Stetson, P.B., Walker, A.R., Monelli, M., Fabrizio, M., Pietrinferni, A., Brocato, E., Buonanno, R., Caputo, F., Cassisi, S., Castellani, M., Cignoni, M., Corsi, C.E., Dall'Ora, M., Degl'Innocenti, S., François, P., Ferraro, I., Iannicola, G., Nonino, M., Moroni, P.G.P., Pulone, L., Smith, H.A., Thévenin, F.   +22 more
openaire   +5 more sources

Chemical and kinematical evolution in nearby dwarf spheroidal galaxies [PDF]

, 2006
Dwarf spheroidal (dSph) galaxies are the least massive and luminous objects known to exist. These galaxies are often considered as the fossil building blocks of massive systems predicted by some cosmological models.
Koch, Andreas
core   +1 more source