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The Analysis of the Barred Galaxy NGC 67011

  • I. Márquez (a1)

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Images: 1.5m Spanish telescope in Calar Alto, Thomson blue coated 1024×1024 CCD, 0.31″pixel−1. Exposition times of 1800, 1500 and 1200 (BV R) and 2000 seconds (Hα and continuum) were used. Seeing FWHM = 1″. Spectra for NGC 6701: 3.5m telescope, PA=25°, 115°, 145° and 175° (Hβ region), 2.2m telescope, PA=25° and 115° (Hα region). The spectrum along the companion galaxy (PA=0°) was also obtained with the 2.2m telescope.

In Figure 1a the bar is clearly seen, extending almost all along an axis very close to the disk minor axis. The spiral arms emerge from the bar, with the arm to the north being the more luminous one. The main spiral structure delineates a pseudo-outer ring when the arms close together. The prominent bar structure has a diamond-like aspect (22″×l2″) mainly traced by the two more intense sides. The zones just immediately inside these linear paths are notably fainter, as expected for a region in which the presence of dust is important. The ellipse fitting to the µB=23.5 mag arcsec−2 isophote gives a = 13, b = 12 and PA = 25°. Total (corrected) magnitudes are m B = 12.96(12.65), m V =12.44(12.20) and m I =11.64(11.46).

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Copyright

Corresponding author

2 Visiting Astronomer, German-Spanish Astronomical Center, Calar Alto, operated by the Max-Planck-Institut fur Astronomie jointly with the Spanish National Commission for Astronomy
3 Instituto de Astrofísica de Andalucía (C.S.I.C), Apdo 3004, 18080 Granada (Spain)

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1

Based on data obtained at the 1.5m telescope of the Estación de Observación de Calar Alto, Instituto Geográfico Nacional and the Consejo Superior de Investigaciones Científicas through the Instituto de Astrofísica de Andalucía

Footnotes

References

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Athanassoula, E. 1984, Physics Reports, 114, 319
Athanassoula, E. 1992, MNRAS, 259, 345
Márquez, I. & Moles, M. 1993, AJ, 105, 2090
Márquez, I., Moles, M., & Masegosa, J. 1995, A&A (submitted)
Martin, P. & Roy, J.-R. 1995, ApJ, 445, 161
Nilson, P. 1973, Uppsala General Catalogue of Galaxies
Noguchi, M. 1990 in Paired and Interacting Galaxies, Sulentic, J.W., Keel, W.C., & Telesco, C.M., NASA-CP3098, 171
Osterbrock, D.E. 1989, Astrophysics of Gaseous Nebulae and Active Galactic Nuclei, Mill Valley University Science Books

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The Analysis of the Barred Galaxy NGC 67011

  • I. Márquez (a1)

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