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Browsing by Author "Laine, S."
Now showing items 1-15 of 15
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Bar evolution over the last 8 billion years: A constant fraction of strong bars in th GEMS Survey
Jogee, S.; Barazza, F.D.; Rix, H-W.; Shlosman, I.; Barden, M.; Wolf, C.; Davies, J.; Heyer, I.; Beckwith, S.; Bell, E.F.; Caldwell, J.A.R.; Conselice, J.; Dahlen, T.; Haussler, B.; Heymans, C.; Jahnke, K.; Knapen, J.; Laine, S.; Lubell, G.M.; Mobasher, B.; McIntosh, D.; Meisenheimar, K.; Peng, C.Y.; Sanchez, S.F.; Somerville, R.S.; Wisotzki, L. (2004-11)One-third of present-day spirals host optically visible strong bars that drive their dynamical evolution. However, the fundamental question of how bars evolve over cosmological times has yet to be resolved, and even the ... -
Bar-Driven Disk Evolution: Grand Design Nuclear Spirals
Jogee, S.; Shlosman, I.; Laine, S.; Englmaier, P.; Knapen, J.; Scoville, N.Z.; Wilson, C.D. (Astronomical Society of the Pacific, 2003)Our study of the grand-design spiral galaxy NGC 5248 reveals that the feature previously thought to be an inclined disk is in fact an extended bar or semi-major axis 7.1 kpc, embedded within a fainter outer disk which is ... -
Bars and Seyferts
Knapen, J.; Laine, S.; Shlosman, I.; Peletier, R.F. (Astronomical Society of the Pacific, 2003)We describe the results of two studies recently undertaken, aimed at quantifying the properties of single and nested stellar bars in well-matched samples of Seyfert and non-Seyfert galaxies. We find that Seyfert host ... -
Circumnuclear kinematics in NGC 5248: the origin of nuclear spiral arms
Laine, S.; Knapen, J.; Perez-Ramirez, D.; Englmaier, P.; Matthias, M. (2001-07) -
Circumnuclear Regions and their Barred Host Galaxies
Perez-Ramirez, D.; Knapen, J.; Laine, S. (2001)In this paper we present first results from an observational study of the connection between the global parameters of barred galaxies and the appearance of structures, such as dust lanes and star-forming rings in their ... -
Circumnuclear regions in barred spiral galaxies - I. Near-infrared imaging
Perez-Ramirez, D.; Knapen, J.; Peletier, R.F.; Laine, S.; Doyon, R.; Nadeau, D. (2000-09) -
Circumnuclear regions in barred spiral galaxies - II. Relations to host galaxies
Knapen, J.; Perez-Ramirez, D.; Laine, S. (2002-12) -
Circumnuclear Star-forming Regions in barred Galaxies
Knapen, J.; Laine, S.; Relano, M. (1999)We present high-resolution Hα velocity fields and rotation curves of the circum nuclear star-forming regions of five barred galaxies. Two of the five objects show substantially smaller initial rises than the three others; ... -
Discovery and Implications of a new large-scale stellar bar in NGC 5248
Jogee, S.; Knapen, J.; Laine, S.; Shlosman, I.; Scoville, N.Z.; Englmaier, P. (2002-05) -
The Extended Bar and Grand-Design Spirals in NGC 5248
Jogee, S.; Knapen, J.; Shlosman, I.; Englmaier, P.; Laine, S.; Scoville, N.Z.; Wilson, C.D. (Astronomical Society of the Pacific, 2002)We present a study of the grand-design spiral galaxy NGC 5248 (Jogee et al. 2002a, b) based on a combination of multi-wavelength observations and hydro-dynamical modeling. A deep R-band image reveals that what was previously ... -
Gasdynamics in NGC 5248: Fueling a circumnuclear starburst ring of super-star clusters
Jogee, S.; Shlosman, I.; Laine, S.; Englmaier, P.; Knapen, J.; Scoville, N.Z.; Wilson, C.D. (2002-08) -
Grand-design spirals in the core of NGC 5248
Laine, S.; Knapen, J.; Perez-Ramirez, D.; Doyon, R.; Nadeau, D. (2001)We report the detection of a bisymmetric nuclear spiral structure in the spiral galaxy NGC 5248.The two red spiral arms can be followed for about 3 arcsec, before they appear to end inside the radius of the circumnuclear ... -
A Hubble Space Telescope Census of Nuclear Star Clusters in Late-Type Spiral Galaxies : Observations and Image Analysis
Boker, T.; Laine, S.; van der Marel, R.; Sarzi, M.; Rix, H-W.; Ho, L.; Shields, J.C. (2002) -
Nested and Single bars in Seyfert and Non-Seyfert Galaxies
Laine, S.; Shlosman, I.; Knapen, J.; Peletier, R.F. (2002-03) -
A nuclear grand-design spiral within the normal disc spiral of NGC 5248
Laine, S.; Knapen, J.; Perez-Ramirez, D.; Doyon, R.; Nadeau, D. (1999-01)We report the discovery of trailing grand-design nuclear spiral structure in the spiral galaxy NGC 5248. Two tightly-wound red spiral arms, with widths less than 1 arcsec (~ 75 pc), emanate at 1 arcsec outside the quiescent ...