Access to Astronomical Catalogues

← Click to display the menu
J/A+A/420/147       Velocity in 6 spiral galaxies       (Blais-ouellette+, 2004)

Accurate determination of the mass distribution in spiral galaxies. III. Fabry-Perot imaging spectroscopy of 6 spiral galaxies. Blais-Ouellette S., Amram P., Carignan C., Swaters R. <Astron. Astrophys., 420, 147-161 (2004)> =2004A&A...420..147B
ADC_Keywords: Galaxies, rotation ; Radial velocities Keywords: Galaxy: fundamental parameters - galaxies: individual: IC 2574, NGC 3109, UGC 2259, NGC 5585, NGC 6503, NGC 2403, NGC 6946, NGC 3198, NGC 5055, NGC 2841, NGC 5985 - galaxies: kinematics and dynamics - cosmology: dark matter - techniques: radial velocities Abstract: High resolution Fabry-Perot data of six spiral galaxies are presented. Those data extend the previous sample of spiral galaxies studied with high resolution 3-D spectroscopy to earlier morphological types. All the galaxies in the sample have available HI data at 21cm from the VLA or Westerbork. Velocity fields are analyzed and Hα rotation curves are computed and compared to HI curves. The kinematics of NGC 5055 central regions are looked at more closely. Its peculiar kinematics can be interpreted either as a bipolar outflow or as a counter-rotating disk, possibly hosting a 9±2x108M_☉-compact object. Most of the Hα rotation curves present a significantly steeper inner slope than their HI counterparts. The 21cm data thus seems affected by moderate to strong beam smearing. The beam smearing has an effect at higher scale-length/beam-width than previously thought (up to 20km/s at a ratio of 8.5). Description: Hα rotation curves for 6 spiral galaxies are presented. The galaxies are UGC 2259, NGC 2403, NGC 6946, NGC 5055, NGC 2841, NGC 5985. For each galaxy each row of the table describes the data at a given distance from the galactic center. Objects: ---------------------------------------------------------- RA (2000) DE Designation(s) (File) ---------------------------------------------------------- 02 47 55.6 +37 32 17 UGC 2259 (tablea1.dat) 07 36 50.6 +65 36 10 NGC 2403 (tablea2.dat) 20 34 52.7 +60 09 14 NGC 6946 (tablea3.dat) 13 15 49.3 +42 01 46 NGC 5055 (tablea4.dat) 09 22 02.0 +50 58 40 NGC 2841 (tablea5.dat) 15 39 36.8 +59 19 52 NGC 5985 (tablea6.dat) ---------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file tablea1.dat 39 27 Optical rotation curve of UGC 2259 at 2.6" resolution tablea2.dat 39 90 Optical rotation curve of NGC 2403 at 6.6" resolution tablea3.dat 39 68 Optical rotation curve of NGC 6946 at 4.4" resolution tablea4.dat 39 137 Optical rotation curve of NGC 5055 at 2.2" resolution tablea5.dat 42 43 Optical rotation curve of NGC 2841 at 4.4" resolution tablea6.dat 39 42 Optical rotation curve of NGC 5985 at 4" resolution
Byte-by-byte Description of file: tablea?.dat
Bytes Format Units Label Explanations
1- 6 F6.2 arcsec R Distance to the center 8- 11 I4 --- Napp ? Number of velocity points for the approaching side 13- 15 I3 km/s Vapp ? Average velocity for the approaching side 17- 19 I3 km/s sigmaapp ? Square root of the variance of the velocities for the approaching side 21- 24 I4 --- Nrec ? Number of velocity points for the receding side 26- 28 I3 km/s Vrec ? Average velocity for the receding side 30- 32 I3 km/s sigmarec ? Square root of the variance of the receding for the approaching side 34- 36 I3 km/s Vel Average velocity and uncertainty 38- 39 I2 km/s e_Vel ? rms uncertainty on Vel
Table A7: Rotation curve of NGC 5985 at ∼10" binning (30" resolution) --------------------------------------------------------------------- R (") Vel (km/s) --------------------------------------------------------------------- 60 294.2 ± 9.21 75 299.0 ± 5.94 90 297.3 ± 3.31 105 295.6 ± 3.42 120 295.9 ± 3.23 135 297.1 ± 3.72 150 292.4 ± 4.49 165 288.6 ± 5.40 180 285.1 ± 5.89 Acknowledgements: Sebastien Ouellette References: Blais-Ouellette et al., Paper I 1999AJ....118.2123B Blais-Ouellette et al., Paper II 2001AJ....121.1952B
(End) Patricia Bauer [CDS] 01-Jun-2004
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

catalogue service

© UDS/CNRS

Contact