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Luminosity distribution in galaxies. I - The elliptical galaxy NGC 3379 as a luminosity distribution standard

1979; Institute of Physics; Volume: 40; Linguagem: Inglês

10.1086/190602

1538-4365

G. de Vaucouleurs, M. Capaccioli,

Galaxies: Formation, Evolution, Phenomena

view Abstract Citations (173) References (31) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Luminosity distribution in galaxies. I. The elliptical galaxy NGC 3379 as a luminosity distribution standard. de Vaucouleurs, G. ; Capaccioli, M. Abstract A standard mean luminosity profile in the B band of the El galaxy NGC 3379 along its east-west x-axis is derived from four sets of medium- and low-resolution photographic and photoelectric McDonald data. The 154 mean points cover a range in excess of 11 mag down to μB = 27.8 mag (x = 7'.3), with possible detection out to x = 16'.3 (μB ≍ 30.9). The profile is represented within ±0.08 mag at ll x > 10" by μ1 = 14.076 + 3.0083 x1/4 (x in arcsec) Near the center the galaxy is brighter than μI by up to 0.35 mag; the excess can be represented by a Gaussian core μII = 18.565 + 0.03965 r2 (r in arcsec) contributing 19.8% of the integrated magnitude B = 11.97 within r* - 12" and 4.0% of the total magnitude BT = 10.225 of the galaxy. This two-component model convolved by the appropriate point spread function represents the data within a standard deviation of 0.04 mag over the whole range. Other analytical formulae give generally poorer fits. There is no evidence for a tidal cutoff or a tidal extension. The integrated magnitudes derived from the model agree with aperture photometry (47 values) within 0.05 mag (s.d.). structure Publication: The Astrophysical Journal Supplement Series Pub Date: August 1979 DOI: 10.1086/190602 Bibcode: 1979ApJS...40..699D Keywords: Distribution (Property); Elliptical Galaxies; Galactic Structure; Luminosity; Photometry; Astrometry; Astronomical Catalogs; Astronomical Photography; Graphs (Charts); Stellar Magnitude; Tables (Data); Astrophysics; Elliptical Galaxies:Luminosities; Elliptical Galaxies:Photometry full text sources ADS | data products NED (1)