Access to Astronomical Catalogues

← Click to display the menu
J/A+A/441/451       UBVRIJHK photometry of E-type galaxies   (Michard+, 2005)

Near infra-red and optical colour gradients in E-type galaxies. Inferences on dust content. Michard R. <Astron. Astrophys., 441, 451-464 (2005)> =2005A&A...441..451M
ADC_Keywords: Galaxies, nearby ; Galaxies, photometry ; Photometry, UBVRIJKLMNH ; Photometry, infrared Keywords: galaxies: elliptical and lenticulars, CD - galaxies: photometry Abstract: Colour gradients are considered for a sample of circa 50 E-type galaxies in the Local Supercluster. The new data includes isophotal colour profiles in J-H, J-K, V-J and V-K, measured using 2MASS frames mostly from the Large Galaxies Atla s, V frames from previous work and V profiles from the literature. This is supplemented by U-B, B-V, B-R, V-I colour gradients obtained anew from published photometric data. The here available file gives our zero-point colours at re/2 and the measured gradients for 54 objects, but for missing data. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file photom.dat 164 54 Data compiled and derived for this work
See also: J/A+A/423/833 : Photometry in elliptical galaxies (Michard+, 2004) J/A+A/429/819 : Photometry in elliptical galaxies. II. (Michard+, 2005) Byte-by-byte Description of file: photom.dat
Bytes Format Units Label Explanations
1- 7 A7 --- Name NGC or IC designation 9- 12 A4 --- MType E, S0 type, and subtype for E (1) 14- 16 I3 km/s sigma Central velocity dispersion (1) 18- 22 I5 Jy F100um ? IRAS 100um flux normalized to Virgo distance (1) 24- 27 F4.2 [arcsec] logre Adopted de Vaucouleurs radius , re 29- 32 F4.2 mag U-B ?=9.99 U-B colour zero-point at r_e_/2 (2) 34- 36 F3.2 mag e_U-B ?=.00 Probable error on U-B colour 38- 43 F6.3 [-] logdU-B ?=0.999 Logarithmic radial gradient of U-B (2) 45- 48 F4.3 [-] e_logdU-B ?=.000 Probable error on dU-B colour gradient 50- 53 F4.2 mag B-V ?=9.99 B-V colour zero-point at r_e_/2 (2) 55- 57 F3.2 mag e_B-V ?=.00 Probable error on B-V colour 59- 64 F6.3 [-] logdB-V ?=0.999 Logarithmic radial gradient of B-V (2) 66- 69 F4.3 [-] e_logdB-V ?=.000 Probable error on dB-V colour gradient 71- 74 F4.2 mag B-R ?=9.99 B-R colour zero-point at r_e_/2 (2) 76- 78 F3.2 mag e_B-R ?=.00 Probable error on B-R colour 80- 85 F6.3 [-] logdB-R ?=0.999 Logarithmic radial gradient of B-R (2) 87- 90 F4.3 [-] e_logdB-R ?=.000 Probable error on dB-R colour gradient 92- 95 F4.2 mag V-I ?=9.99 V-I colour zero-point at r_e_/2 (2) 97- 99 F3.2 mag e_V-I ?=.00 Probable error on V-I colour 101-106 F6.3 [-] logdV-I ?=0.999 Logarithmic radial gradient of V-I (2) 108-111 F4.3 [-] e_logdV-I ?=.000 Probable error on dV-I colour gradient 113-116 F4.2 mag V-J ?=9.99 V-J colour zero-point at re/2 118-123 F6.3 [-] logdV-J ?=0.999 Logarithmic radial gradient of V-J (3) 125-128 F4.2 mag V-K ?=9.99 V-K colour zero-point at re/2 130-135 F6.3 [-] logdV-K ?=0.999 Logarithmic radial gradient of V-K (3) 137-140 F4.2 mag J-H ?=9.99 J-H colour zero-point at re/2 142-147 F6.3 [-] logdJ-H ?=0.999 Logarithmic radial gradient of J-H (3) 149-152 F4.2 mag J-K ?=9.99 J-K colour zero-point at re/2 154-159 F6.3 [-] logdJ-K Logarithmic radial gradient of J-K (3) 162-164 F3.1 --- S2 Peculiarity index (1)
Note (1): Galaxy types and subtypes, central velocity dispersion, IRAs fluxes and the S2 index are repeated from Michard & Prugniel, 2004, Cat. J/A+A/423/833 Note (2): U-B, B-V, B-R and V-I colours and gradients are taken and/or remeasured from several sources, hence the derivation of errors for each object. Note (3): V-J, V-K, J-H, J-K colours and gradients are new measurements deemed homogeneous: probable errors should be nearly the same for all objects. Errors on zero-point colours: 0.025 in V-J, V-K, 0.013 in J-H, J-K Errors on gradients: 0.032 in dV-J, 0.035 in dV-K, 0.017 in dJ-H, dJ-K
Acknowledgements: Raymond Michard, raymond.michard(at)obspm.fr
(End) Raymond Michard [Observ. Paris], Patricia Vannier [CDS] 04-Oct-2005
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