The origin of stellar populations in the Galactic bulge from chemical abundances [PDF]
Monthly notices of the Royal Astronomical Society, 2019 In this work, we study the formation and chemical evolution of the Galactic bulge with particular focus on the abundance pattern ([Mg/Fe] versus [Fe/H]), metallicity, and age distribution functions.
F. Matteucci +6 more
semanticscholar +1 more source
Structure and kinematics of Type II Cepheids in the Galactic bulge based on near-infrared VVV data [PDF]
Astronomy & Astrophysics, 2018 Context. Type II Cepheids (T2Cs) are radially pulsating variables that trace old stellar populations and provide distance estimates through their period-luminosity (PL) relation. Aims.
V. F. Braga +7 more
openalex +3 more sources
The WFC3 Galactic Bulge Treasury Program: Relative Ages of Bulge Stars of High and Low Metallicity [PDF]
Astrophysical Journal, 2018 The Hubble Space Telescope/WFC3 multiband photometry spanning from the UV to the near-IR of four fields in the Galactic bulge, together with that for six template globular and open clusters, are used to photometrically tag the metallicity [Fe/H] of stars
A. Renzini +8 more
semanticscholar +1 more source
The GIRAFFE Inner Bulge Survey (GIBS) III. Metallicity distributions and kinematics of 26 Galactic bulge fields [PDF]
, 2016 Several recent studies have demonstrated that the Galactic bulge hosts two components with different mean metallicities, and possibly different spatial distribution and kinematics.
M. Zoccali +16 more
semanticscholar +1 more source
Galactic bulge preferred over dark matter for the Galactic centre gamma-ray excess [PDF]
Nature Astronomy, 2016 An anomalous gamma-ray excess emission has been found in the Fermi Large Area Telescope data1 covering the centre of the Galaxy2,3. Several theories have been proposed for this ‘Galactic centre excess’.
O. Macias +6 more
semanticscholar +1 more source
Star formation history of the Galactic bulge from deep HST imaging of low reddening windows [PDF]
, 2018 Despite the huge amount of photometric and spectroscopic efforts targetting the Galactic bulge over the past few years, its age distribution remains controversial owing to both the complexity of determining the age of individual stars and the difficult ...
E. Bernard +5 more
semanticscholar +1 more source
Three candidate globular clusters discovered in the Galactic bulge [PDF]
Monthly Notices of the Royal Astronomical Society: Letters, 2019 This work reports the discovery of three new globular clusters (GCs) towards the Galactic bulge - Camargo 1107, 1108, and 1109. The discovery was made using the WISE, 2MASS, VVV, and Gaia-DR2 photometry. The new findings are old (12.0-13.5 Gyr) and metal-
D. Camargo, D. Minniti
semanticscholar +1 more source
The Fermi-LAT GeV excess as a tracer of stellar mass in the Galactic bulge [PDF]
Nature Astronomy, 2017 An anomalous emission component at energies of a few gigaelectronvolts and located towards the inner Galaxy is present in the Fermi-LAT data. At present, the two most promising explanations are the annihilation of dark matter particles or the presence of
R. Bartels +3 more
semanticscholar +1 more source
Abundances of planetary nebulae in the Galactic bulge [PDF]
, 2015 Context. Planetary nebulae (PNe) abundances are poorly known for those nebulae in the Galactic bulge. This is because of the high and uneven extinction in the bulge which makes visual spectral measurements difficult.
Asplund +32 more
core +2 more sources
Thick disk and pseudobulge formation in a clump cluster
EPJ Web of Conferences, 2012 Bulges in spiral galaxies have been supposed to be classified into two types: classical bulges or pseudobulges. Classical bulges are thought to form by galactic merger with bursty star formation, whereas pseudobulges are suggested to form by secular ...
Inoue S.
doaj +1 more source