Contrôle cinématographique et protection des jeunes

Michard, Henri

doi:10.3406/comm.1967.1128

Cited by 5 publications

(2 citation statements)

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“…{ to be complete, there are only 3 transition cases S0/a in Dressler's data: we spread these 3 cases into 3 adjoining cells, including one Sa. A similar comparison based on the smaller, but complete, KP1608 sample was also performed (Michard, 1995). The results are in agreement: 1/3 of Dressler's ellipticals show photometric evidence for a disk, and nearly 25% of his E's and non barred S0's show evidence for a bar from the measured isophotal twists.…”

Section: Comparison With Other Studies : Morphological Classi Cationsupporting

confidence: 58%

“…6, including a comparison with previous isophotal analyses of galaxies in the Coma cluster. These results will be used in subsequent papers to study properties of galaxies in di erent environments, the morphological segregation of galaxies in clusters and the continuity between ellipticals and lenticulars, among other projects (see Andreon 1994and Michard 1994, 1995 for further details).…”

Section: Introductionmentioning

confidence: 99%

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Morphological classification and structural parameters for early-type galaxies in the Coma cluster

Andreon

Davoust

Michard

et al. 1996

Astron. Astrophys. Suppl. Ser.

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Abstract. -We present the results of an isophotal shape analysis of three samples of galaxies in the Coma cluster. Quantitative morphology, together with structural and photometric parameters, is given for each galaxy. Special emphasis has been placed on the detailed classification of early-type galaxies. The three samples are: i) a sample of 97 early-type galaxies brighter than mB = 17.00 falling within one degree from the center of the Coma cluster; these galaxies were observed with CCD cameras, mostly in good to excellent resolution conditions; ii) a magnitude complete sample of 107 galaxies of all morphological types down to mB = 17.00 falling in a circular region of 50 arcmin diameter, slightly offcentered to the North-West of the cluster center; the images for this and the next sample come from digitized photographic plates; iii) a complete comparison sample of 26 galaxies of all morphological types down to mR = 16.05 (or mB 17.5), also in a region of 50 arcmin diameter, but centered 2.6 degrees West of the cluster center. The reliability of our morphological classifications and structural parameters of galaxies, down to the adopted magnitude limits, is assessed by comparing the results on those galaxies for which we had images taken with different instrumentation and/or seeing conditions, and by comparing our results with similar data from other observers.

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Section: Comparison With Other Studies : Morphological Classi Cationsupporting

confidence: 58%

Section: Introductionmentioning

confidence: 99%