Results 101 to 110 of about 470,379 (288)

Simulations of normal spiral galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2003
Accepted for publication in: Monthly Notices of the Royal Astron. Soc. The astro-ph copy has a few figures with degraded resolution. A copy with high quality graphics (4281 kb) can be downloaded from the kapteyn institute weg page at http://www.astro.rug.nl (Goto preprints and preprints 2003)
openaire   +4 more sources

Decreased Frequency of Strong Bars in S0 Galaxies: Evidence for Secular Evolution?

, 2010
Using data from the Near-Infrared S0 Survey (NIRS0S) of nearby, early-type galaxies, we examine the distribution of bar strengths in S0 galaxies as compared to S0/a and Sa galaxies, and as compared to previously published bar strength data for Ohio State
Abraham, Bekki, Bell, Burstein, Buta, Buta, Buta, Buta, Buta, Buta, Buta, Buta, Combes, Combes, de Vaucouleurs, Dressler, E. Laurikainen, Eskridge, H. Salo, Heller, J. H. Knapen, Kormendy, Laurikainen, Laurikainen, Laurikainen, Laurikainen, Martinez-Valpuesta, Merrifield, Persic, R. Buta, Sandage, Shen, Shioya, Skrutskie, Speltincx, van den Bergh, Zhang, Zhang, Zhang   +38 more
core   +1 more source

Uncovering Spiral Structure in Flocculent Galaxies [PDF]

, 1996
We present K'(2.1 micron) observations of four nearby flocculent spirals, which clearly show low-level spiral structure and suggest that kiloparsec-scale spiral structure is more prevalent in flocculent spirals than previously supposed.
Adamson A. J., Block D. L., Braine J., Casali M., Elmegreen B. G., Heckman T. M., Michele D. Thornley   +6 more
core   +2 more sources

The Dynamics of the Spiral Galaxy M81 [PDF]

Symposium - International Astronomical Union, 1978
The spiral galaxy M81 is a challenging object for testing a density-wave theory. It is of large angular size and favourably inclined to the line of sight; radio observations of neutral atomic hydrogen showing well defined spiral arms with noncircular motions are available (Rots and Shane 1975), and there is evidence from surface photometry for density ...
openaire   +3 more sources

Synergies in Self‐Assembly—From Supramolecular Polymers to Defined Hierarchical Superstructures

Journal of Polymer Science, EarlyView.
Shaping supramolecular polymers built from molecular building blocks into superstructures with defined dimensions. Synergies within supramolecular architectures such as chirality or an additional second orthogonal driving force that does not interfere with the central supramolecular motif facilitate the confinement of the growth of these ...
Klaus Kreger, Florian Behrendt, Johannes C. Brendel   +2 more
wiley   +1 more source

Galaxy Formation by Galactic Magnetic Fields [PDF]

, 1999
Galaxies exhibit a sequence of various morphological types, i.e., the Hubble sequence, and they are basically composed of spheroidal components (elliptical galaxies and bulges in spiral galaxies) and disks.
Baugh C. M., Fitt A. J., Kauffmann G., Klein U., Mo H. J., Niklas S., Peacock J. A., Shore S. N., Vallee J. P., Vallee J. P.   +9 more
core   +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, EarlyView.
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

Molecular Gas in Spiral Galaxies

, 1997
In this review, I highlight a number of recent surveys of molecular gas in nearby spiral galaxies. Through such surveys, more complete observations of the distribution and kinematics of molecular gas have become available for galaxies with a wider range ...
A Boselli, AJ Baker, BG Elmegreen, BG Elmegreen, BG Elmegreen, BK Rownd, CA Norman, CD Wilson, CD Wilson, CD Wilson, D Friedli, E Athanassoula, F Bertoldi, H Hafok, J Braine, K Nishiyama, K Sakamoto, K Sakamoto, K Sheth, K. Nishiyama, L Loinard, L Loinard, LJ Sage, LP Crosthwaite, LP Crosthwaite, M Dumke, M Hidaka, M Honma, MD Thornley, MW Regan, N Arimoto, P Crosthwaite, P Maloney, P Maloney, RC Kennicutt Jr., RC Kennicutt Jr., S Berman, S Berman, S Chakrabarti, S Jogee, T Böker, T Wong, TAD Paglione, TM Dame, TM Dame, Tony Wong, TT Helfer, Y Sofue, Y Sofue, Y Sofue, Y Sofue   +50 more
core   +2 more sources

A Morphological Method to Determine Co-Rotation Radii in Spiral Galaxies [PDF]

, 1996
Shock induced star formation in a stellar density wave scenario produces an azimuthal gradient of ages across the spiral arms which has opposite signs on either side of the corotation resonance (CR).
Athanassoula E., Beckman J. E., Horacio Dottori, Ivânio Puerari, Puerari I.   +4 more
core   +3 more sources

Radial Metallicity Distribution Breaks at Corotation Radius in Spiral Galaxies [PDF]

, 2012
We analyzed the relation between the corotation radii and the galactic radii at which breaks or changes of slope of the metallicity gradients occur in spiral galaxies.
S. Scarano, J. L'epine
semanticscholar   +1 more source