scholarly journals Hα KINEMATICS OF THE ISOLATED INTERACTING GALAXY PAIR KPG 486 (NGC 6090)

2020 ◽  
Vol 56 (1) ◽  
pp. 71-83
Author(s):  
M. M. Sardaneta ◽  
M. Rosado ◽  
M. Sánchez-Cruces
Keyword(s):  
Velocity Field ◽  
Emission Line ◽  
Kinematic Analysis ◽  
Rotation Curve ◽  
Dynamic Behaviour ◽  
Hydrogen Gas ◽  
Kinematic Parameters ◽  
Optical Images ◽  
Fabry Perot ◽  
Hα Emission

In optical images, the barely studied isolated interacting galaxy pair KPG 486 (NGC 6090) displays similar features to the Antennae (NGC 4038/39) galaxy pair. To compare the distribution of ionized hydrogen gas, morphology and kinematic and dynamic behaviour of both galaxy pairs, we present observations in the Hα emission line of NGC 6090 acquired with the scanning Fabry-Perot interferometer, PUMA. For each galaxy in NGC 6090 we obtained several kinematic parameters, its velocity field and its rotation curve. We also analysed some of the perturbations induced by their encounter. We verified the consistency of our results by comparing them with kinematic results from the literature. The comparison of our results on NGC 6090 with those obtained in a previous similar kinematic analysis of the Antennae highlighted great differences between these galaxy pairs.

scholarly journals Taurus Observations of the Emission-Line Velocity Field of Centaurus A (NGC 5128)

1983 ◽  
Vol 100 ◽  
pp. 331-334
Author(s):  
Keith Taylor ◽  
Paul D. Atherton
Keyword(s):  
Velocity Field ◽  
Emission Line ◽  
Spatial Resolution ◽  
Line Material ◽  
Fabry Perot ◽  
Dark Lane ◽  
Centaurus A

Using TAURUS – an Imaging Fabry Perot system in conjunction with the IPCS on the AAT, we have studied the velocity field of the Ha emission line at a spatial resolution of 1.7″ over the dark lane structure of Centaurus A. The derived velocity field is quite symmetrical and strongly suggests that the emission line material is orbiting the elliptical component, as a warped disc.

scholarly journals Hα Survey of the Large Magellanic Cloud

1995 ◽  
Vol 149 ◽  
pp. 155-159 ◽  
Author(s):  
A. Laval ◽  
E. le Coarer ◽  
Y.P. Georgelin ◽  
M. Marcelin ◽  
P. Amram ◽  
...  
Keyword(s):  
Kinetic Energy ◽  
Emission Line ◽  
Large Magellanic Cloud ◽  
Central Core ◽  
Evolutionary Stage ◽  
Line Profiles ◽  
Fabry Perot ◽  
Hα Emission ◽  
Spherical Expansion ◽  
The One

AbstractThe LMC is being surveyed in the Hα emission line with a scanning Fabry-Perot interferometer, attached to the 36 cm telescope of the Observatoire de Marseille. The present results concern the kinematical mapping of bright nebulae; it shows that the kinetic energy involved in the gas motion is closely related to the evolutionary stage of the embedded stars. In particular, in the 30 Dor nebula, a few one-peaked line profiles remain at the boundaries of the shells, among the numerous split areas. The 50-100 pc shells exhibit a relatively usual spherical expansion, with velocities in the same range at the boundaries. On the contrary, the 10-20 pc shells of the central core show different velocities of the one-peak sides of the shells.

scholarly journals A Fabry-Perot study of Wolf-Rayet ring nebulae in M 33

1999 ◽  
Vol 193 ◽  
pp. 372-373
Author(s):  
Anthony P. Marston ◽  
Laurent Drissen ◽  
Steve Godbout
Keyword(s):  
Emission Line ◽  
Local Group ◽  
Central Star ◽  
Fabry Perot ◽  
Show Evidence ◽  
Hα Emission ◽  
Mass Ejection ◽  
Ring Nebulae ◽  
Group Galaxy ◽  
Local Group Galaxy

We present a kinematical study of ring nebulae surrounding Wolf-Rayet stars in the Local Group galaxy M 33, based on Fabry-Perot data obtained at the CFHT. Most of these rings show evidence for multiple phases of mass ejection from the central star. Variations are noted in the [OIII]/Hα emission-line ratios across several ring nebulae generally associated a variation in kinematics. Significant [O III] emission appears to arise from the collision between the fast WR wind and surrounding ejecta from a prior phase, such as a RSG or LBV.

scholarly journals Rapid variability of Hα emission line in Be stars

1994 ◽  
Vol 162 ◽  
pp. 254-256
Author(s):  
B. G. Anandarao ◽  
A. Chakraborty ◽  
R. Swaminathan ◽  
B. Lokanadham
Keyword(s):  
Emission Line ◽  
Emission Lines ◽  
Be Stars ◽  
Rapid Variability ◽  
Fabry Perot ◽  
Dark Counts ◽  
Hα Emission

We have initiated an observational campaign on some bright Be stars in order to investigate the rapid variability in emission lines using a Fabry-Perot spectrometer(λ/δλ = 104; FSR = 21.3Å) at the Nasmyth focus of the 1.22 m JRO telescope at Hyderabad, India. The PMT dark counts were 1 – 2sec-1. Here we report our first observations on four stars.

scholarly journals KPG 390: A pair of trailing spirals.

2010 ◽  
Vol 6 (S271) ◽  
pp. 127-134
Author(s):  
P. Repetto ◽  
M. Rosado ◽  
R. Gabbasov ◽  
I. Fuentes-Carrera
Keyword(s):  
Dark Matter ◽  
Surface Brightness ◽  
Rotation Curve ◽  
Velocity Fields ◽  
Minor Axis ◽  
The Other ◽  
Kinematic Parameters ◽  
First Case ◽  
Fabry Perot ◽  
Different Types

AbstractIn this study we present scanning Fabry-Perot Hα observations of the isolated interacting galaxy pair NGC 5278/79. We derived velocity fields, various kinematic parameters and rotation curves for both galaxies. These kinematical results together with the fact that dust lanes have been detected in both galaxies, as well as the analysis of surface brightness profiles along the minor axis, allowed us to determine univocally that both components of the interacting pair are trailing spirals. We have also estimated the mass of NGC 5278 fitting its rotation curve with a disk-halo component. We have tested three different types of halo (pseudo-isothermal, Hernquist and Navarro Frenk White) and we have obtained that the rotation curve can be fitted either with a pseudo-isothermal, an Hernquist halo or a Navarro Frenk White halo component, although in the first case the amount of dark matter required is about ten times smaller than for the other two halo distributions.

scholarly journals 2D kinematics of the edge-on spiral galaxy ESO 379-006

2012 ◽  
Vol 8 (S295) ◽  
pp. 234-235
Author(s):  
M. Rosado ◽  
R. F. Gabbasov ◽  
P. Repetto ◽  
I. Fuentes-Carrera ◽  
P. Amram ◽  
...  
Keyword(s):  
Velocity Field ◽  
Radial Velocity ◽  
Rotation Curve ◽  
Minor Axis ◽  
Ionized Gas ◽  
Diffuse Ionized Gas ◽  
Fabry Perot ◽  
The Galaxy ◽  
Rotation Motion

AbstractWe present a kinematical study of the marginally edge-on galaxy ESO 379-006. With Fabry-Perot spectroscopy at Hα we obtain velocity maps, the radial velocity field, and position-velocity diagrams parallel to the major and to the minor axis of the galaxy. We build the rotation curve of the galaxy and discuss the role of projection effects. The twisting of isovelocities in the radial velocity field of the disk of ESO 379-006 as well as a kinematical asymmetry found in the position-velocity diagrams parallel to the minor axis suggest the existence of non-circular motions that can be modeled by including a radial inflow besides the rotation motion. Extraplanar Diffuse Ionized gas was detected in this galaxy both from the images and from its kinematics. It is possible that the diffuse gas is lagging in rotation.

scholarly journals The stellar velocity field in M 51

1970 ◽  
Vol 38 ◽  
pp. 79-82
Author(s):  
S. M. Simkin
Keyword(s):  
Velocity Field ◽  
Large Deviations ◽  
Rotation Curve ◽  
Radial Velocities ◽  
Absorption Lines ◽  
Image Tube ◽  
Stellar Velocity

Radial velocities have been measured from the absorption lines on two image tube spectra of M 51. These velocities show large deviations from the ‘smoothed’ rotation curve for that object. The measurements seem to indicate that both the stars and the gas move in the same way.

scholarly journals DEEP FABRY-PEROT Hα OBSERVATIONS OF NGC 7793: A VERY EXTENDED Hα DISK AND A TRULY DECLINING ROTATION CURVE

2008 ◽  
Vol 135 (6) ◽  
pp. 2038-2047 ◽  
Author(s):  
I. Dicaire ◽  
C. Carignan ◽  
P. Amram ◽  
M. Marcelin ◽  
J. Hlavacek-Larrondo ◽  
...  
Keyword(s):  
Rotation Curve ◽  
Fabry Perot
Sign in / Sign up

Export Citation Format

Share Document