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J/AJ/134/945     Tully-Fisher relation for SDSS galaxies        (Pizagno+, 2007)

The Tully-Fisher relation and its residuals for a broadly selected sample of galaxies. Pizagno J., Prada F., Weinberg D.H., Rix H.-W., Pogge R.W., Grebel E.K., Harbeck D., Blanton M., Brinkmann J., Gunn J.E. <Astron. J., 134, 945-972 (2007)> =2007AJ....134..945P
ADC_Keywords: Galaxies, photometry ; Photometry, SDSS ; Rotational velocities Keywords: galaxies: kinematics and dynamics - galaxies: structure Abstract: We measure the relation between galaxy luminosity and disk circular velocity (the Tully-Fisher [TF] relation), in the g, r, i, and z bands, for a broadly selected sample of galaxies from the Sloan Digital Sky Survey, with the goal of providing well-defined observational constraints for theoretical models of galaxy formation. The input sample of 234 galaxies has a roughly flat distribution of absolute magnitudes in the range -18.5>Mr>-22, and our only morphological selection is an isophotal axis ratio cut b/a≤0.6 to allow accurate inclination corrections. Long-slit spectroscopy from the Calar Alto and MDM observatories yields usable Halpha rotation curves for 162 galaxies (69%), with a representative color and morphology distribution. We define circular velocities V80 by evaluating the rotation curve at the radius containing 80% of the i-band light. Description: Spectroscopic observations were carried out at the Calar Alto Observatory using the TWIN spectrograph mounted on the 3.5m telescope, and at the MDM Observatory using the CCDS spectrograph mounted on the 2.4m Hiltner telescope. Observations at Calar Alto were carried out between 2001 June and 2002 October; 30 nights were allocated in total, but many were clouded out. Observations at MDM were carried out between 2003 February and 2004 April, on a total of 18 nights. A total of 237 spectra were taken, with 52 spectra from MDM and 185 from Calar Alto. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 117 234 Photometric parameters table3.dat 74 234 Arc-tangent functional fit and rotation speed
See also: II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009) : SDSS Home Page Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 19 A19 --- SDSS SDSS identification ( 21 A1 --- n_SDSS [ab] Note on magnitude reported here (1) 23- 28 F6.2 Mpc dlg Local Group barycenter distance (2) 30- 33 F4.2 Mpc e_dlg Uncertainty in dlg 35- 40 F6.2 mag gMAG Absolute SDSS g band Petrosian magnitude (1) 42- 45 F4.2 mag e_gMAG Uncertainty in gMAG 47- 52 F6.2 mag rMAG Absolute SDSS r band Petrosian magnitude (1) 54- 57 F4.2 mag e_rMAG Uncertainty in rMAG 59- 64 F6.2 mag iMAG Absolute SDSS i band Petrosian magnitude (1) 66- 69 F4.2 mag e_iMAG Uncertainty in iMAG 71- 76 F6.2 mag zMAG Absolute SDSS z band Petrosian magnitude (1) 78- 81 F4.2 mag e_zMAG Uncertainty in zMAG 83- 86 F4.2 mag g-r ? SDSS (g-r) band model color index 88- 91 F4.2 mag e_g-r ? Uncertainty in g-r 93- 96 F4.2 --- D/T ? Disk-to-Total flux ratio (4) 98-102 F5.2 kpc Ri ? Half-light radius (4) 104-107 F4.2 kpc e_Ri ? Uncertainty in Ri 109-112 F4.2 --- b/a ? Disk axis ratio (4) 114-117 F4.2 --- e_b/a ? Uncertainty in b/a
Note (1): The magnitudes are Petrosian magnitude, corrected for internal extinction, and K-corrected including the luminosity distance, unless the n_SDSS flag specifies is set with: a = GALFIT magnitude used instead of SDSS Petrosian, because of poor pipeline estimation of the total observed magnitude b = flag-4 galaxies with absolute magnitudes and model colors that do not contain internal extinction corrections and K-corrections Note (2): For H0=70km/s/Mpc. Note (4): Computed from the i-band GALFIT models.
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 19 A19 --- SDSS SDSS identification 21 A1 --- f_SDSS [ab] Rotation curve not used (1) 23- 28 F6.2 km/s Vcirc ? Asymptotic circular velocity (2) 30- 34 F5.2 arcsec rt ? Turn-over radius (3) 36- 41 F6.2 km/s Vc80 ? Circular velocity at the radius containing 80% of the i-band light (2) 43- 47 F5.2 km/s e_Vc80 ? Uncertainty in V80 49- 54 F6.2 km/s Vend ? Last measured velocity (2) 56- 59 F4.2 km/s e_Vend ? Uncertainty in Vend 61- 66 F6.2 km/s V2.2 ? Velocity at 2.2 times the disk exponential scale length (2) 68- 72 F5.2 km/s e_V2.2 ? Uncertainty in V2.2 74 I1 --- Flag [1/4] Rotation curve peculiarities (4)
Note (1): Flag on SDSS as follows: a = Rotation curve data not used because of a poorly determined SDSS pipeline isophotal position angle b = Rotation curve data not used because of a poorly determined SDSS pipeline isophotal axis ratio Note (2): Parameters of arc-tangent functional fits after 10km/s has been added to the velocity measurement errors on each data point. The velocities have been corrected for inclination and cosmological broadening. Note (3): Where the rotation curve goes from steadily rising to flat. Note (4): Galaxy flag as follows: 1 = extended flat portion of the rotation curve 2 = rotation curve just reaches the turnover region 3 = rotation curve still rising at the outermost data point 4 = observed but did not have enough Hα to determine a rotation curve
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 03-Oct-2009
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

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