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 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:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 117 234 Photometric parameters
table3.dat 74 234 Arc-tangent functional fit and rotation speed
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See also:
II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)
http://www.sdss.org : SDSS Home Page
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 19 A19 --- SDSS SDSS identification (JHHMMSS.ss+DDMMSS.s)
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
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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.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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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)
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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
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 03-Oct-2009