Results 81 to 90 of about 52,268 (222)

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

Morphometric and External Injury Characterization of Rainbow Trout (O. mykiss) Used for Stocking in the Alpine River Inn (Bavaria, Germany)

Fisheries Management and Ecology, EarlyView.
ABSTRACT Stocking fish is a common practice in fisheries management, particularly for species of high conservation value or economic importance. Despite its widespread use, systematic evaluation of fish stockings remains scarce. This includes non‐native species such as rainbow trout (Oncorhynchus mykiss), which are intensively stocked into European ...
Christoffer Nagel, David Goldbrunner, Josef Knott, Joachim Pander, Juergen Geist   +4 more
wiley   +1 more source

Abundant molecular gas in tidal dwarf galaxies: On-going galaxy formation [PDF]

Astronomy & Astrophysics, 2001
[Abridged...] We investigate the process of galaxy formation as can be observed in the only currently forming galaxies -- the so-called Tidal Dwarf Galaxies, hereafter TDGs -- through observations of the molecular gas detected via its CO emission. These objects are formed of material torn off of the outer parts of a spiral disk due to tidal forces in a
Braine, J., Duc, P. -A., Lisenfeld, U., Charmandaris, V., Vallejo, O., Leon, S., Brinks, E.   +6 more
openaire   +2 more sources

Breaks in surface brightness profiles and radial abundance gradients in the discs of spiral galaxies

, 2017
We examine the relation between breaks in the surface brightness profiles and radial abundance gradients within the optical radius in the discs of 134 spiral galaxies from the CALIFA survey. The distribution of the radial abundance (in logarithmic scale)
Grebel, E. K, Nefedyev, Y. A., Pilyugin, L. S., Vilchez, J. M., Zinchenko, I. A.   +4 more
core   +1 more source

Complete element abundances of nine stars in the r-process galaxy Reticulum II [PDF]

, 2016
We present chemical abundances derived from high-resolution Magellan/MIKE spectra of the nine brightest known red giant members of the ultra-faint dwarf galaxy Reticulum II.
Chiti, Anirudh, Frebel, Anna, Ji, Alexander P., Simon, Joshua D.   +3 more
core   +2 more sources

Noble gases and nitrogen in material from asteroid Bennu

Meteoritics &Planetary Science, EarlyView.
Abstract We report the elemental and isotopic abundances of all stable noble gases (helium, neon, argon, krypton, and xenon) in eight particles from asteroid Bennu returned by NASA's OSIRIS‐REx mission. We also report nitrogen abundances and isotopic ratios that were analyzed alongside neon and argon in four additional Bennu particles.
B. Marty, L. Zimmermann, E. Füri, D. V. Bekaert, J. J. Barnes, A. N. Nguyen, H. C. Connolly, D. S. Lauretta   +7 more
wiley   +1 more source

The abundance and radial distribution of satellite galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2005
Using detailed mock galaxy redshift surveys (MGRSs) we investigate the abundance and radial distribution of satellite galaxies. The mock surveys are constructed using the conditional luminosity function (CLF), and are compared against data from the 2dFGRS.
van den Bosch, FC, Yang, XH, Mo, HJ, Norberg, P   +3 more
openaire   +5 more sources

The Gas-phase Mass–Metallicity Relation for Massive Galaxies at z ∼ 0.7 with the LEGA-C Survey

The Astrophysical Journal
The massive end of the gas-phase mass–metallicity relation (MZR) is a sensitive probe of active galactic nuclei (AGN) feedback that is a crucial but highly uncertain component of galaxy evolution models.
Zach J. Lewis, Brett H. Andrews, Rachel Bezanson, Michael Maseda, Eric F. Bell, Romeel Davé, Francesco D’Eugenio, Marijn Franx, Anna Gallazzi, Anna de Graaff, Yasha Kaushal, Angelos Nersesian, Jeffrey A. Newman, Arjen van der Wel, Po-Feng Wu   +14 more
doaj   +1 more source

CI chondrite Oued Chebeika 002 links asteroids Bennu and Ryugu to common parent body

Meteoritics &Planetary Science, EarlyView.
Abstract CI chondrites are a compositionally primitive group of meteorites that have undergone extensive aqueous alteration, providing insights into the evolution of primitive planetesimals. Oued Chebeika 002 is the most pristine CI chondrite to date.
Megan Broussard, Katharina Lodders, Paul K. Carpenter, Piers Koefoed, Karen Ziegler, Kunihiko Nishiizumi, Marc W. Caffee, Laurence A. J. Garvie, Ryan C. Ogliore, Anthony J. Irving, Bradley L. Jolliff, Kun Wang   +11 more
wiley   +1 more source

CARBON AND NITROGEN ABUNDANCES IN EARLY-TYPE GALAXIES [PDF]

The Astrophysical Journal, 2009
For the first time, we undertake a systematic examination of the nitrogen abundances for a sample of 35 early-type galaxies spanning a range of masses and local environment. The nitrogen-sensitive molecular feature at 3360 has been employed in conjunction with a suite of atomic- and molecular-sensitive indices to provide unique and definitive ...
Toloba, E., Sánchez Blázquez, Patricia, Gorgas García, Francisco Javier, Gibson, B. K.   +3 more
openaire   +4 more sources