Results 21 to 30 of about 6,480 (173)

Lenticular galaxies with ultraviolet rings [PDF]

Astronomy Letters, 2011
Based on GALEX (Galaxy Ultraviolet Explorer) data, we have compiled a list of lenticular galaxies with ultraviolet rings—radially localized star-forming regions. We have analyzed the optical structure of these galaxies using SDSS (Sloan Digital Sky Survey) surface photometry, measured the colors of the rings, and compared the radial localizations of ...
M. A. Ilyina, O. K. Sil’chenko
openaire   +1 more source

Formation of Magnesium Carbonates on Earth and Implications for Mars

Journal of Geophysical Research: Planets, Volume 126, Issue 7, July 2021., 2021
Abstract Magnesium carbonates have been identified within the landing site of the Perseverance rover mission. This study reviews terrestrial analog environments and textural, mineral assemblage, isotopic, and elemental analyses that have been applied to establish formation conditions of magnesium carbonates.
Eva L. Scheller, Carl Swindle, John Grotzinger, Holly Barnhart, Surjyendu Bhattacharjee, Bethany L. Ehlmann, Ken Farley, Woodward W. Fischer, Rebecca Greenberger, Miquela Ingalls, Peter E. Martin, Daniela Osorio‐Rodriguez, Ben P. Smith   +12 more
wiley   +1 more source

Outer disks of lenticular galaxies [PDF]

Proceedings of the International Astronomical Union, 2011
By studying the stellar population properties along the radius in 15 nearby S0 galaxies, I have found that the outer stellar disks are mostly old, with the SSP-equivalent ages of 8-15 Gyr, being often older than the bulges. This fact puts into doubt a currently accepted paradigm that S0 galaxies have formed at z=0.4 by quenching star formation in ...
openaire   +3 more sources

Dense Molecular Gas in Lenticular Galaxies [PDF]

Publications of the Astronomical Society of Japan, 2002
We made CO and HCN simultaneous observations of lenticular galaxies (NGC 404, NGC 3593, and NGC 4293) and detected HCN emission in NGC 3593 and NGC 4293 as well as CO in all the galaxies. The $I_\mathrm{HCN} / I_\mathrm{CO}$ ratios were $0.025 \pm 0.006$ and $0.066 \pm 0.005$ in NGC 3593 and NGC 4293, respectively, which are comparable to that of late ...
Kuno, N., Nakai, N., Sorai, K., Nishiyama, K., Vila-Vlaro, B.   +4 more
openaire   +2 more sources

Evidence for a Diagenetic Origin of Vera Rubin Ridge, Gale Crater, Mars: Summary and Synthesis of Curiosity's Exploration Campaign

Journal of Geophysical Research: Planets, Volume 125, Issue 12, December 2020., 2020
Abstract This paper provides an overview of the Curiosity rover's exploration at Vera Rubin ridge (VRR) and summarizes the science results. VRR is a distinct geomorphic feature on lower Aeolis Mons (informally known as Mount Sharp) that was identified in orbital data based on its distinct texture, topographic expression, and association with a hematite
A. A. Fraeman, L. A. Edgar, E. B. Rampe, L. M. Thompson, J. Frydenvang, C. M. Fedo, J. G. Catalano, W. E. Dietrich, T. S. J. Gabriel, A. R. Vasavada, J. P. Grotzinger, J. L'Haridon, N. Mangold, V. Z. Sun, C. H. House, A. B. Bryk, C. Hardgrove, S. Czarnecki, K. M. Stack, R. V. Morris, R. E. Arvidson, S. G. Banham, K. A. Bennett, J. C. Bridges, C. S. Edwards, W. W. Fischer, V. K. Fox, S. Gupta, B. H. N. Horgan, S. R. Jacob, J. R. Johnson, S. S. Johnson, D. M. Rubin, M. R. Salvatore, S. P. Schwenzer, K. L. Siebach, N. T. Stein, S. M. R. Turner, D. F. Wellington, R. C. Wiens, A. J. Williams, G. David, G. M. Wong   +42 more
wiley   +1 more source

Lack of FIBRILLIN6 in Arabidopsis thaliana affects light acclimation and sulfate metabolism

New Phytologist, Volume 225, Issue 4, Page 1715-1731, February 2020., 2020
Summary Arabidopsis thaliana contains 13 fibrillins (FBNs), which are all localized to chloroplasts. FBN1 and FBN2 are involved in photoprotection of photosystem II, and FBN4 and FBN5 are thought to be involved in plastoquinone transport and biosynthesis, respectively. The functions of the other FBNs remain largely unknown.
Kwanuk Lee, Martin Lehmann, Melanie V. Paul, Liangsheng Wang, Manja Luckner, Gerhard Wanner, Peter Geigenberger, Dario Leister, Tatjana Kleine   +8 more
wiley   +1 more source

Rotation of the large lenticular galaxy NGC 612* [PDF]

Monthly Notices of the Royal Astronomical Society, 1980
The radio galaxy NGC 612 (≡ PKS 0131 – 36) has been studied spectroscopically and the velocity field measured in emission lines of [O II], [O III] and Hα. A rotation curve has been determined to a radius of 40 kpc (H=50kms−1Mpc−1)⁠. The rotation curve of this SO galaxy is essentially flat, as is found for many late-type systems, with an amplitude of ...
GOSS, WM, DANZIGER, IJ, FOSBURY, RAE, BOKSENBERG, A   +3 more
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Kinematics and stellar disk modeling of lenticular galaxies [PDF]

Astrophysical Bulletin, 2012
18 pages, 6 figures, slightly shortened ...
Zasov, A. V., Khoperskov, A. V., Katkov, I. Yu., Afanasiev, V. L., Kaisin, S. S.   +4 more
openaire   +2 more sources

Creating lenticular galaxies with major mergers [PDF]

, 2016
Lenticular galaxies (S0s) represent the majority of early-type galaxies in the local Universe, but their formation channels are still poorly understood. While galaxy mergers are obvious pathways to suppress star formation and increase bulge sizes, the marked parallelism between spiral and lenticular galaxies (e.g.
Querejeta, M, Eliche-Moral, MC, Tapia, T, Borlaff, A, Ven, GVD, Lyubenova, M, Martig, M, Falcón-Barroso, J, Méndez-Abreu, J, Zamorano, J, Gallego, J   +10 more
openaire   +2 more sources

Properties of stellar populations in isolated lenticular galaxies [PDF]

Astrophysical Bulletin, 2014
In this paper we present the results of long-slit spectral observations for a sample of isolated lenticular galaxies, made with the SCORPIO and SCORPIO-2 spectrographs of the 6-meter BTA telescope of the SAO RAS. By applying full spectral fitting technique using the stellar population evolutionary synthesis models, we have measured the radial profiles ...
Katkov, Ivan, Sil'chenko, Olga, Afanasiev, Victor   +2 more
openaire   +2 more sources