Results 41 to 50 of about 84,685 (303)

Distribution of refractory and volatile elements in CoRoT planet host stars

, 2010
We report on preliminary results of spectroscopic determination of the atmospheric parameters and chemical abundances of the parent stars of the recently discovered transiting planets CoRoT-2b and CoRoT-4b.
Domingos, R. C. [UNESP], Spite, M., Drake, N. A., la Reza, R. de, Pereira, C. B., Barbuy, B., Winter, O. C. [UNESP], Chavero, C., Cunha, K.   +8 more
core   +1 more source

Chemical Abundances as Population Tracers [PDF]

, 2013
Chapter to appear in textbook "Planets, Stars & Stellar Systems", Vol. 5, Ed. G. Gilmore, Springer-Verlag.
openaire   +2 more sources

Recent Development of the Atomic Line List

Galaxies, 2018
The Atomic Line List is an online database of wavelengths and transition probabilities of atomic lines. It is primarily set up as a tool to help identify unknown spectral features.
Peter A. M. van Hoof
doaj   +1 more source

Chemical abundances of LINER galaxies – nitrogen abundance estimations

Monthly Notices of the Royal Astronomical Society
ABSTRACT 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, Â. C. Krabbe, O. L. Dors, I. A. Zinchenko, J. A. Hernández-Jiménez, M. V. Cardaci, G. F. Hägele, Gabriele S Ilha   +7 more
openaire   +3 more sources

Chemical Abundances of a Sample of Oxygen-dominated Galaxies

The Astrophysical Journal, 2023
We spectroscopically analyzed a sample of 85 Sloan Digital Sky Survey compact, oxygen-dominated galaxies located at redshift z ∼ 0.001–0.350, selected because of their large equivalent width of [O iii ] λ 5007 (larger than 200 Å). These galaxies might be
B. E. Miranda-Pérez, A. M. Hidalgo-Gámez   +1 more
doaj   +1 more source

Chemical abundances in seven galactic planetary nebulae

, 2006
An observational study of chemical abundances in the galactic planetary nebulae NGC ...
M. V. F. Copetti, A. C. Krabbe
core   +1 more source

A Systematic NLTE Study of Very Metal-poor Stars with Metallicity down to −4.3 dex. I. Global Stellar Parameters Based on High-resolution Spectra

The Astrophysical Journal
Very metal-poor (VMP) stars provide a record of the chemical composition and dynamics of the early Galaxy. Based on the high-resolution and high signal-to-noise ratio spectra from the Subaru Telescope for 103 VMP stars, in this series of papers we ...
Jianrong Shi, Gang Zhao, Shuai Liu, Zeming Zhou, Haining Li, Hongliang Yan, Sofya Alexeeva, Huawei Zhang, Wako Aoki, Tadafumi Matsuno, Jingkun Zhao, Huiling Chen, Yufu Shen   +12 more
doaj   +1 more source

Protein pyrophosphorylation by inositol pyrophosphates — detection, function, and regulation

FEBS Letters, EarlyView.
Protein pyrophosphorylation is an unusual signaling mechanism that was discovered two decades ago. It can be driven by inositol pyrophosphate messengers and influences various cellular processes. Herein, we summarize the research progress and challenges of this field, covering pathways found to be regulated by this posttranslational modification as ...
Sarah Lampe, Tanmay Kumar Mohanty, Rashna Bhandari, Dorothea Fiedler   +3 more
wiley   +1 more source

Evidence for Ubiquitous Carbon Grain Destruction in Hot Protostellar Envelopes

The Astrophysical Journal Letters, 2023
Earth is deficient in carbon and nitrogen by up to ∼4 orders of magnitude compared with the Sun. Destruction of (carbon- and nitrogen-rich) refractory organics in the high-temperature planet-forming regions could explain this deficiency.
Pooneh Nazari, Benoît Tabone, Merel L. R. van ’t Hoff, Jes K. Jørgensen, Ewine F. van Dishoeck   +4 more
doaj   +1 more source

Beyond the Iron Peak: r- and s-Process Elemental Abundances in Stars with Planets

, 2008
We present elemental abundances of 118 stars (28 of which are known extrasolar planetary host stars) observed as part of the Anglo-Australian Planet Search.
Bond, J. C., Tinney, C. G., Marcy, G. W., Butler, R. P., Jones, H. R. A., O'Toole, S. J., Lauretta, D. S., Carter, B. D., Bailey, J.   +8 more
core   +1 more source