Results 91 to 100 of about 948,048 (332)

Chemical Abundances of a Sample of Oxygen-dominated Galaxies [PDF]

, 2023
B. E. Miranda-Pérez, A. M. Hidalgo-Gámez   +1 more
openalex   +1 more source

The gas-to-extinction ratio and the gas distribution in the Galaxy [PDF]

, 2017
We investigate the relation between the optical extinction ($A_V$) and the hydrogen column density ($N_H$) determined from X-ray observations of a large sample of Galactic sightlines toward 35 supernova remnants, 6 planetary nebulae, and 70 X-ray ...
Hui Zhu, W. Tian, Aigen Li, Mengfei Zhang   +3 more
semanticscholar   +1 more source

Relationship between the Elemental Abundances and the Kinematics of Galactic-Field RR Lyrae Stars

, 2017
Data of our compiled catalog containing the positions, velocities, and metallicities of 415 RR~Lyrae variable stars and the relative abundances [el/Fe] of 12~elements for 101 RR~Lyrae stars, including four $\alpha$~elements (Mg, Ca, Si, and Ti), are used
Gozha, M. L., Koval', V. V., Marsakov, V. A.   +2 more
core   +1 more source

The early days of the Sculptor dwarf spheroidal galaxy [PDF]

, 2015
We present the high resolution spectroscopic study of five -3 ...
Battaglia, G., Francois, P., Helmi, A., Hill, V., Irwin, M., Jablonka, P., Mashonkina, L., North, P., Primas, F., Revaz, Y., Shetrone, M., Starkenburg, E., Tolstoy, E., Venn, K.   +13 more
core   +4 more sources

SFR and Abundances of Nearby Galaxies [PDF]

Proceedings of the International Astronomical Union, 2015
AbstractWe present star formation rates and nebular abundances of 59 different star-forming regions in 16 nearby galaxies. The star-forming regions were selected to be bright in Hα and were observed with the SNIFS integral field spectrograph on the UH 2.2m telescope. The spectra span the wavelength range between 3200Å and 1μm.
Marianne Takamiya, Daniel Berke, Forrest Bremer, Casey Jones, Guillaume Poquet   +4 more
openaire   +1 more source

Understanding Degradation Mechanisms in Water‐In‐Salt Electrolyte. Part 2: Impact of the Electrochemical Parameters on the Cycling Behavior of LiFePO4 versus TiS2

Batteries &Supercaps, EarlyView.
Cycling water‐in‐salt batteries involves complex degradation processes that require multiprobe analysis. Using online electrochemical mass spectrometry (OEMS), postmortem X‐ray photoemission spectroscopy (XPS) (including hard‐XPS), and scanning electron microscopy (SEM), the degradation mechanisms are examined in composite electrodes (TiS2 and LiFePO4)
Célia Doublet, Théo Faverge, Vincent Martin, Hiram Castillo Michel, Jean‐Pascal Rueff, Marian Chatenet, Lauréline Lecarme, Claire Villevieille   +7 more
wiley   +1 more source

Generalized Te([O iii])–Te(He i) Discrepancies in Ionized Nebulae: Possible Evidence of Case B Deviations and Temperature Inhomogeneities

The Astrophysical Journal
The physics of recombination lines in the He i singlet system is expected to be relatively simple, supported by accurate atomic models. We examine the intensities of He i singlets λ 3614,  λ 3965,  λ 5016,  λ 6678, and  λ 7281 and the triplet He i λ 5876
J. E. Méndez-Delgado, E. D. Skillman, E. Aver, C. Morisset, C. Esteban, J. García-Rojas, K. Kreckel, N. S. J. Rogers, F. F. Rosales-Ortega, K. Z. Arellano-Córdova, S. R. Flury, E. Reyes-Rodríguez, M. Orte-García, S. Tan   +13 more
doaj   +1 more source

Reconciling the local galaxy population with damped Lyman α cross-sections and metal abundances [PDF]

, 2005
A comprehensive analysis of 355 high-quality Westerbork Synthesis Radio Telescope (WSRT) HI 21-cm line maps of nearby galaxies shows that the properties and incident rate of damped Lyman alpha absorption systems (DLAs) observed in the spectra of high ...
M. Zwaan, J. Hulst, F. Briggs, M. Verheijen, E. Ryan-Weber   +4 more
semanticscholar   +1 more source

Oxygen and Nitrogen in Leo A and GR 8

, 2005
We present elemental abundances for multiple HII regions in Leo A and GR 8 obtained from long slit optical spectroscopy of these two nearby low luminosity dwarf irregular galaxies.
De Robertis M. M., Evan D. Skillman, Gathier R., Heydari-Malayeri M., Howarth I. D., Hummer D. G., Lambert D. L., Legrand F., Liese van Zee, Maddox S. J., Martha P. Haynes, Masegosa J., Moles M., Olofsson K., Pagel B. E. J., Pagel B. E. J., Peimbert M., Pilyugin L. S., Ronnback J., Seaton M. J., Skillman E. D., Skillman E. D., Stasinska G., Webster B. L., Zijlstra A. A.   +24 more
core   +1 more source

Abundance ratios in hierarchical galaxy formation [PDF]

Astrophysics and Space Science, 1999
7 pages, 3 figures, accepted by ...
openaire   +5 more sources