CCD photometry of axisymmetric and non-axisymmetric Galactic bulges in the I-band

Bibcode
1990ESOC...35..285V
Varela, A. M.; Munoz-Tunon, C.; Beckman, J. E.; Prieto, M.; Cepa, J.
Bibliographical reference

IN: ESO/CTIO Workshop on Bulges of Galaxies, La Serena, Chile, Jan. 16-19, 1990, Proceedings (A92-18101 05-90). Garching, Federal Republic of Germany, European Southern Observatory, 1990, p. 285-288.

Advertised on:
0
1990
Number of authors
5
IAC number of authors
5
Citations
1
Refereed citations
1
Description
The paper presents a set of CCD images of four Galactic bulges, taken in the I photometric band under very good imaging conditions, with the Taurus camera on the 4.2-m William Herschel Telescope. As well as showing calibrated isophotes, the results of ellipticity analysis are given, which bring out a clear dichotomy between two of the bulges, where a degree of triaxiality is implied, and the other two, which are much closer to axisymmetry. In the nonaxisymmetric cases, ellipticities and position angles vary rapidly with radius within the bulge. The presence of star-forming activity can be inferred, which is probably induced by an effect of the underlying asymmetry in the older stellar population.
Type
Non-refereed
Starburst galaxies
Elliptical galaxies

It may interest you

  • Non-refereed
    3.5 years of observing exoplanet day sides with CHEOPS

    Characterising Exoplanets Satellite (CHEOPS) is the first ESA exoplanet space mission. The satellite carries a 30cm telescope, optimised to deliver exquisite (ppm-level) photometry of bright exoplanetary systems at optical wavelengths. CHEOPS has spent approximately 20% of its observing time during its 3.5-year long nominal mission studying

    Lendl, Monika et al.

    Advertised on:

    4
    2024
    Bibcode
    2024ESS.....510204L
    Citations
    0
  • Non-refereed
    Finding Water Worlds with Transit Timing Variations

    Models predict that planets with water-rich compositions may be common around low-mass stars, but definitive evidence for the existence of water worlds has remained elusive. Precise mass and radius measurements for small planets allow us to identify candidate water worlds that have bulk densities too low to be consistent with a rocky composition

    Greklek-McKeon, Michael et al.

    Advertised on:

    4
    2024
    Bibcode
    2024ESS.....560502G
    Citations
    0
  • Non-refereed
    First light and results for atmospheric characterization with The Near Infra-Red Planet Searcher (NIRPS)

    NIRPS is a new fiber-fed high spectral resolution (~80k) spectrograph assisted by adaptive optics installed on the 3.6m telescope of ESO at LaSilla, Chile. Operated simultaneously with HARPS, NIRPS covers the Y, J, and H bands. The commissioning phase demonstrated high stability for time-series observations along precise radial velocities reaching

    Allart, Romain et al.

    Advertised on:

    4
    2024
    Bibcode
    2024ESS.....562419A
    Citations
    0