scholarly journals Can we measure the slopes of density profiles in dwarf spheroidal galaxies?

2013 ◽  
Vol 431 (3) ◽  
pp. 2796-2807 ◽  
Author(s):  
Klaudia Kowalczyk ◽  
Ewa L. Łokas ◽  
Stelios Kazantzidis ◽  
Lucio Mayer
Keyword(s):  
Density Profiles ◽  
Dwarf Spheroidal Galaxies ◽  
Spheroidal Galaxies

Population gradients in dwarf spheroidal galaxies KKs 3 and ESO 269-66

2018 ◽  
Vol 14 (S344) ◽  
pp. 420-421
Author(s):  
M. E. Sharina ◽  
L. N. Makarova ◽  
D. I. Makarov
Keyword(s):  
Surface Density ◽  
Globular Clusters ◽  
Stellar Populations ◽  
Density Profiles ◽  
Dwarf Spheroidal Galaxies ◽  
Star Forming ◽  
Central Regions ◽  
Low Metallicity ◽  
High Metallicity ◽  
Spheroidal Galaxies

AbstractWe compare the properties of stellar populations for globular clusters (GCs) and field stars in two dwarf spheroidal galaxies (dSphs): ESO269-66, a close neighbour of NGC5128, and KKs3, one of the few isolated dSphs within 10 Mpc. We analyse the surface density profiles of low and high metallicity (blue and red) stars in two galaxies using the Sersic law. We argue that 1) the density profiles of red stars are steeper than those of blue stars, which evidences in favour of the metallicity and age gradients in dSphs; 2) globular clusters in KKs3 and ESO 269-66 contain 4 and 40 percent of all stars with [Fe / H] ~ 1.6 dex and the age of 12 Gyr, correspondingly. Therefore, GCs are relics of the first powerful star-forming bursts in the central regions of the galaxies. KKs 3 has lost a smaller percentage of old low-metallicity stars than ESO269-66, probably, thanks to its isolation.

scholarly journals HI Distribution in Extreme Dwarf Irregulars and Dwarf Spheroidals

1998 ◽  
Vol 11 (1) ◽  
pp. 121-122
Author(s):  
Claude Carignan
Keyword(s):  
Star Formation ◽  
Stellar Population ◽  
Large Fraction ◽  
Dwarf Spheroidal Galaxies ◽  
Irregular Galaxies ◽  
Single Burst ◽  
Dwarf Spheroidals ◽  
Dwarf Irregular Galaxies ◽  
Spheroidal Galaxies

Recent studies (Puche & Westpfahl 1994, Young & Lo 1996) have shown that the distribution of HI in some extreme low luminosity dwarf irregular galaxies (e.g. M81dwA, Holmberg I, Leo A) tends to have a ring-like (or shell-like) distribution which suggests that a single burst of star formation could expell most of the remaining ISM (or at least a large fraction of it) from the system. In view of this, Puche & Westpfahl (1994) suggested that in dwarf spheroidal galaxies, the HI should be found at large radii since no young stellar population is observed in most of them.

scholarly journals VERITAS SEARCH FOR VHE GAMMA-RAY EMISSION FROM DWARF SPHEROIDAL GALAXIES

2010 ◽  
Vol 720 (2) ◽  
pp. 1174-1180 ◽  
Author(s):  
V. A. Acciari ◽  
T. Arlen ◽  
T. Aune ◽  
M. Beilicke ◽  
W. Benbow ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Dwarf Spheroidal Galaxies ◽  
Gamma Ray Emission ◽  
Spheroidal Galaxies

scholarly journals The interstellar medium in Andromeda's dwarf spheroidal galaxies – II. Multiphase gas content and ISM conditions

2016 ◽  
Vol 465 (3) ◽  
pp. 3741-3758 ◽  
Author(s):  
Ilse De Looze ◽  
Maarten Baes ◽  
Diane Cormier ◽  
Hiroyuki Kaneko ◽  
Nario Kuno ◽  
...  
Keyword(s):  
Interstellar Medium ◽  
Gas Content ◽  
Dwarf Spheroidal Galaxies ◽  
Spheroidal Galaxies

scholarly journals FORMATION OF DWARF SPHEROIDAL GALAXIES VIA MERGERS OF DISKY DWARFS

2011 ◽  
Vol 740 (1) ◽  
pp. L24 ◽  
Author(s):  
Stelios Kazantzidis ◽  
Ewa L. Łokas ◽  
Lucio Mayer ◽  
Alexander Knebe ◽  
Jaroslaw Klimentowski
Keyword(s):  
Dwarf Spheroidal Galaxies ◽  
Spheroidal Galaxies
Sign in / Sign up

Export Citation Format

Share Document