Chromium: NLTE abundances in metal-poor stars and nucleosynthesis in the Galaxy [PDF]
, 2010 Aims. We investigate statistical equilibrium of Cr in the atmospheres of late-type stars to ascertain whether the systematic abundance discrepancy between Cr I and Cr II lines, as often found in previous work, is due to deviations from local ...
M. Bergemann, G. Cescutti
semanticscholar +1 more source
EXTRAGALACTIC CHEMICAL ABUNDANCES: DO H ii REGIONS AND YOUNG STARS TELL THE SAME STORY? THE CASE OF THE SPIRAL GALAXY NGC 300 [PDF]
, 2009 We have obtained new spectrophotometric data for 28 H ii regions in the spiral galaxy NGC 300, a member of the nearby Sculptor Group. The detection of several auroral lines, including [O iii] λ4363, [S iii] λ6312, and [N ii] λ5755, has allowed us to ...
F. Bresolin +5 more
semanticscholar +1 more source
The Astrophysical Journal, 2023 Taking advantage of the Photometric objects Around Cosmic webs method developed in Paper I, we measure the excess surface density ${\bar{n}}_{2}{w}_{{\rm{p}}}$ of the photometric objects around spectroscopic objects down to stellar masses 10 ^8.0 M _ ...
Kun Xu +3 more
doaj +1 more source
Neutron star mergers and rare core-collapse supernovae as sources of r-process enrichment in simulated galaxies [PDF]
, 2020 We use cosmological, magnetohydrodynamical simulations of Milky Way-mass galaxies from the Auriga project to study their enrichment with rapid neutron capture (r-process) elements. We implement a variety of enrichment models from both binary neutron star
Grand, Robert J. J. +5 more
core +3 more sources
The chemical abundances in the Galactic Centre from the atmospheres of Red Supergiants [PDF]
, 2008 The Galactic Centre (GC) has experienced a high degree of recent star-forming activity, as evidenced by the large number of massive stars currently residing there.
Asplund +38 more
core +2 more sources
The Ital-FLAMES survey of the Sagittarius dwarf spheroidal galaxy - I. Chemical abundances of bright RGB stars [PDF]
, 2005 We present iron and α element (Mg, Ca, Ti) abundances for a sample of 15 Red Giant Branch stars belonging to the main body of the Sagittarius dwarf Spheroidal galaxy.
L. Monaco +17 more
semanticscholar +1 more source
Element Abundances In Nearby Galaxies [PDF]
, 2004 In these lectures I present a highly opinionated review of the observed patterns of metallicity and element abundance ratios in nearby spiral, irregular, and dwarf elliptical galaxies, with connection to a number of astrophysical issues associated with chemical evolution.
openaire +2 more sources
Images, Structural Properties, and Metal Abundances of Galaxy Clusters Observed with Chandra ACIS-I at 0.1 < z < 1.3 [PDF]
, 2007 We have assembled a sample of 115 galaxy clusters at 0.1 < z < 1.3 with archived Chandra ACIS-I observations. We present X-ray images of the clusters and make available region files containing contours of the smoothed X-ray emission.
B. Maughan +3 more
semanticscholar +1 more source
Distribution of iron, oxygen, and sulfur in the direction of the outer arms of the Galaxy★
Astronomy & AstrophysicsAims. We conducted a high-resolution spectroscopic study of 51 distant Cepheids located in the outer part of the Galactic disk in the direction of the Perseus Arm.
Andrievsky S. M. +2 more
doaj +1 more source
Chemical abundances of LINER galaxies – nitrogen abundance estimations
Monthly Notices of the Royal Astronomical SocietyABSTRACT In this work, we investigated the nitrogen and oxygen abundances in a sample of galaxies with Low Ionization Nuclear Emission Regions (LINERs) in their nucleus. Optical spectroscopic data (3600 – 10 000 Å) of 40 LINERs from the Mapping Nearby Galaxies (MaNGAs) survey were considered.
C B Oliveira +7 more
openaire +3 more sources