TY - JOUR
T1 - NGC 5953/54
T2 - BVRIHαJK photometry and [N II] Fabry-Perot interferometry: I. The data
AU - Hernández-Toledo, H. M.
AU - Fuentes-Carrera, I.
AU - Rosado, M.
AU - Cruz-González, I.
AU - Franco-Balderas, A.
AU - Dultzin-Hacyan, D.
PY - 2003/12
Y1 - 2003/12
N2 - We present new BVRIHαJK imaging and [N II] scanning Fabry-Perot observations for the interacting galaxy pair NGC 5953/54. Morphology is reviewed using a combination of contrast-enhanced images, color-index maps, and geometric (radial μ, = 1 - b/a, PA and a4/a) profile parameters. Our data are complemented by archived V/R/H images from HST. The Seyfert 2 NGC 5953 shows an underlying featureless disk (≥1.5 kpc) in all the observed bands and traces of faint external fan-like features in Ha and [N II]. A compact flocculent spiral pattern (≤1.5 kpc), and a ∼60 pc bar-like central structure are also observed. The Liner galaxy NGC 5954 is an inclined and distorted spiral with a strong circumnuclear starburst region and star-forming regions throughout the disk. A tidal bridge or distorted arm appears to link the two galaxies, extending to the northwest as a linear feature (plume). NGC 5954 also shows blue filaments delineating bubble-like features on the north side of the nucleus where our Fabry-Perot observations reveal double emission line profiles. We derive BVRIJK magnitudes and surface brightness profiles for the galaxies. HST V/R and H-band surface brightness profiles are also presented for NGC 5953. Fabry-Perot observations yield an [N II] velocity field and rotation curves for the components. The observations coupled with results from a simulation atlas of tidal features allow us 1) to suggest a tentative geometry of the encounter in NGC 5953/54, and 2) to comment about a suspected secular transformation in NGC 5953/54 via the interaction process. A forthcoming paper is devoted to a more detailed analysis of our observations including HI synthesis observations and n-body numerical simulations.
AB - We present new BVRIHαJK imaging and [N II] scanning Fabry-Perot observations for the interacting galaxy pair NGC 5953/54. Morphology is reviewed using a combination of contrast-enhanced images, color-index maps, and geometric (radial μ, = 1 - b/a, PA and a4/a) profile parameters. Our data are complemented by archived V/R/H images from HST. The Seyfert 2 NGC 5953 shows an underlying featureless disk (≥1.5 kpc) in all the observed bands and traces of faint external fan-like features in Ha and [N II]. A compact flocculent spiral pattern (≤1.5 kpc), and a ∼60 pc bar-like central structure are also observed. The Liner galaxy NGC 5954 is an inclined and distorted spiral with a strong circumnuclear starburst region and star-forming regions throughout the disk. A tidal bridge or distorted arm appears to link the two galaxies, extending to the northwest as a linear feature (plume). NGC 5954 also shows blue filaments delineating bubble-like features on the north side of the nucleus where our Fabry-Perot observations reveal double emission line profiles. We derive BVRIJK magnitudes and surface brightness profiles for the galaxies. HST V/R and H-band surface brightness profiles are also presented for NGC 5953. Fabry-Perot observations yield an [N II] velocity field and rotation curves for the components. The observations coupled with results from a simulation atlas of tidal features allow us 1) to suggest a tentative geometry of the encounter in NGC 5953/54, and 2) to comment about a suspected secular transformation in NGC 5953/54 via the interaction process. A forthcoming paper is devoted to a more detailed analysis of our observations including HI synthesis observations and n-body numerical simulations.
KW - Galaxies: interactions galaxies: fundamental parameter
KW - Galaxies: kinematics and dynamics
KW - Galaxies: photometry
KW - Galaxies: spiral
KW - Galaxies: structure
UR - http://www.scopus.com/inward/record.url?scp=10744225727&partnerID=8YFLogxK
U2 - 10.1051/0004-6361:20031445
DO - 10.1051/0004-6361:20031445
M3 - Artículo de revisión
SN - 0004-6361
VL - 412
SP - 669
EP - 687
JO - Astronomy and Astrophysics
JF - Astronomy and Astrophysics
IS - 3
ER -