Results 91 to 100 of about 30,254 (217)

Multicolor Photometry of Barred Spiral Galaxies [PDF]

International Astronomical Union Colloquium, 1996
B – V and R – I color maps (from CCD imagery obtained at Cerro Tololo Inter-American Observatory) of six barred spiral galaxies have been used (Horst 1992) to investigate stellar populations within the bars and nuclei. Two-color diagrams show that the distribution of pixel colors largely parallels the expected locus for normal unreddened stars. If the “
William D. Horst, Charles J. Peterson
openaire   +2 more sources

Analysis, Testing, and Design of a UHF and HF Peer‐to‐Peer Communication System for the Europan Cryosphere

Earth and Space Science, Volume 12, Issue 8, August 2025.
Abstract This study presents a validated design of a dual‐band wireless relay system of “pucks” for through‐ice communication between a cryobot and a surface lander during a future exploration of the Europan cryosphere. The design of a terrestrial demonstration system and the results of a 103 m through‐ice system test in a relevant environment near ...
Jake Sahli, Albin J. Gasiewski, William C. Stone, Brian Pease, Veronica Guerrero, Vickie Siegel, Justin Smith   +6 more
wiley   +1 more source

Reexamination of the Radial Abundance Gradient Break in NGC 3359

, 2011
In this contribution, we reexamine the radial oxygen abundance gradient in the strongly barred spiral galaxy NGC 3359, for which, using an imaging spectrophotometric technique, Martin & Roy detected a break near the effective radius of the galaxy.
Alloin, Bresolin, Combes, Considère, Das, de Vaucouleurs, Dutil, Dutil, Eskridge, F. Bresolin, Friedli, Friedli, Garnett, H. J. Zahid, Hummer, Kashikawa, Kewley, Kewley, Kobulnicky, Marinova, Menéndez-Delmestre, Pagel, Pfenniger, Roy, Rozas, Sheth, van Zee, Vila-Costas   +27 more
core   +1 more source

BVRI Surface Photometry of (S+S) Binary Galaxies. I. The data [PDF]

, 2001
We present multicolour broad band ($BVRI$) photometry for a sample of 33 spiral-spiral (S+S) binary galaxies drawn from the Karachentsev Catalogue of Isolated Pairs of Galaxies (KPG).
Avila-Reese, Avila-Reese, Baugh, Bergvall, Burstein, Cardelli, Chevalier, de Jong, Doroshenko, Dultzin-Hacyan, Elmegreen, Godwin, H. M. Hernández-Toledo, Han, Haynes, Hernández-Toledo, Holmberg, I. Puerari, Jansen, Johansson, Junqueira, Karachentsev, Kauffmann, Keel, Kennicutt, Knapen, Lacey, Larson, Laurikainen, Mayer, Metcalfe, Moore, Márquez, Márquez, Prugniel, Prugniel, Reduzzi, Reshetnikov, Roberts, Sofue, Stocke, Sulentic, Whitford, Xu, Zaritsky   +44 more
core   +2 more sources

Chemical enrichment in isolated barred spiral galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2018
16 pages, 11 figures, accepted for publication in ...
Hugo Martel, Christian Carles, Fidèle Robichaud, Sara L Ellison, David J Williamson   +4 more
openaire   +2 more sources

Age‐Associated Decline in Autophagy Pathways in the Retinal Pigment Epithelium and Protective Effects of Topical Trehalose in Light‐Induced Outer Retinal Degeneration in Mice

Aging Cell, Volume 24, Issue 7, July 2025.
Transcriptomic analyses reveal an age‐related decline in autophagy pathways in RPE/choroid. These pathways remain unchanged in early AMD but become bidirectionally dysregulated in later stages, along with increased RPE loss. Pre‐treatment with trehalose eyedrops enhances RPE autophagy flux and prevents light‐induced outer retinal degeneration in mice ...
Katherine Cox, Gongyu Shi, Neve Read, Mohamed T. Patel, Kepeng Ou, Zijia Liu, Jiahui Wu, Suci Cendanawati, Jenna Le Brun Powell, Pola Goldberg Oppenheimer, Lisa J. Hill, Lindsay B. Nicholson, Andrew D. Dick, Jian Liu   +13 more
wiley   +1 more source

Perspectives [PDF]

AJNR Am J Neuroradiol, 2023
Ross J.
europepmc   +2 more sources

The Shape and Figure Rotation of NGC 2915's Dark Halo [PDF]

, 1999
NGC 2915 is a blue compact dwarf galaxy with a very extended HI disk showing a short central bar and extended spiral arms, both reaching far beyond the optical component.
Aoki S., Athanassoula E., Athanassoula E., Athanassoula E., Athanassoula E., Becquaert J.-F., Begeman K. G., Binney J. J., Binney J. J., Broeils A. H., Combes F., Combes F., Contopoulos G., D. W. Pfitzner, G. R. Meurer, Gerin M., Goldreich P., K. C. Freeman, Lequeux J., Lindblad P. A. B., Lindblad P. A. B., M. Bureau, Merrifield M. R., Meurer G. R., Noguchi M., Petrou M., Pfenniger D., Pfenniger D., Sancisi R., Schmidt K.-H., Schwarz M. P., Seiger M. S., Sellwood J. A., Sellwood J. A., Sellwood J. A., Sparke L. S., Sparke L. S., Sygnet J. F., Teuben P. J., Tully R. B., Weinberg M. D., Wilson T. L.   +41 more
core   +2 more sources

Is NGC 4631 a barred spiral galaxy?

The Astronomical Journal, 1991
High- and low-dispersion optical spectra of the giant H II region CM 67 near the center of the edge-on galaxy NGC 4631 have been obtained. Comparisons are made with radio observations to suggest the existence of a large bar in NGC 4631. Region CM 67 is shown to coincide in position with the easternmost peak of a triple radio-continuum source.
Jianguo Wang, Jean-Rene Roy, Robin Arsenault   +2 more
openaire   +2 more sources

Plasticity of the heart in response to changes in physical activity

The Journal of Physiology, Volume 603, Issue 13, Page 3665-3677, 1 July 2025.
Abstract figure legend The heart adapts to changes in physical activity, with inactivity (e.g. bed rest or spaceflight) causing cardiac atrophy and ventricular stiffening, and endurance exercise training leading to eccentric hypertrophy and improved ventricular compliance.
Eric T. Hedge, Tiffany L. Brazile, Richard L. Hughson, Benjamin D. Levine   +3 more
wiley   +1 more source