Hyperleda

Paturel, G.; Theureau, G.; Bottinelli, L.; Gouguenheim, L.; Coudreau-Durand, N.; Hallet, N.; Petit, C.

doi:10.1051/0004-6361:20031412

Cited by 169 publications

(208 citation statements)

References 35 publications

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“…After rejecting galaxies flagged as morphologically peculiar by Kannappan et al (2002, hereafter KFF), we define two subsamples for which mass estimates should be robust: (1) 38 spiral/irregular galaxies with both H i data from the HyperLeda homogenized H i catalog (Paturel et al 2003) and optical emission-line rotation curves passing the quality criteria of KFF, with the latter also having asymmetry !10% and extent 11.3 times the B-band half-light radius (Kannappan & e.g., KGB, Fig. 9).…”

Section: Methodsmentioning

confidence: 99%

Systematic Uncertainties in Stellar Mass Estimation for Distinct Galaxy Populations

Kannappan

Gawiser²

2007

ApJ

104

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We show that different stellar mass estimation methods yield overall mass scales that disagree by factors up to ∼2 for the galaxy population and, more importantly, relative mass scales that sometimes disagree by z p 0 factors տ3 between distinct classes of galaxies (spiral/irregular types, classical E/S0s, and E/S0s whose colors reflect recent star formation). This comparison considers stellar mass estimates based on (1) two different calibrations of the correlation between K-band mass-to-light ratio and color and (2) detailed fitting of UBRJHK B Ϫ R photometry and optical spectrophotometry using two different population synthesis models (Bruzual-Charlot and Maraston), with the same initial mass function in all cases. We also compare stellarϩgas masses with dynamical masses. This analysis offers only weak arguments for preferring a particular stellar mass estimation method, given the plausibility of real variations in dynamical properties and dark matter content. These results help to calibrate the systematic uncertainties inherent in mass-based evolutionary studies of galaxies, including comparisons of low-and high-redshift galaxies.

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Section: Methodsmentioning

confidence: 99%

Systematic Uncertainties in Stellar Mass Estimation for Distinct Galaxy Populations

Kannappan

Gawiser²

2007

ApJ

104

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“…To maximize the number of galaxies available for study, we chose our sample from the LEDA database 4 which contains all galaxies in common catalogs (e.g., NGC, UGC, IC), plus additional galaxies only defined in the Principal Galaxy Catalog (PGC; Paturel et al 1997). While the PGC is inclusive of many other galaxy catalogs, galaxies with diameters less than $1 0 still fall below the completeness threshold (Fig.…”

Section: Selection Algorithmmentioning

confidence: 99%

“…However, to improve fits to the velocity field we required that two spatial resolution elements Note. -Paturel et al (1997). Units of right ascension are hours, minutes, and seconds, and units of declination are degrees, arcminutes, and arcseconds.…”

Section: Densepak H Observationsmentioning

confidence: 99%

“…a de Vaucouleurs type for the galaxy (de Vaucouleurs et al 1991). b Morphological type placed in a pseudonumerical scale (Paturel et al 1997). c Diameter measured from the isophote at a B-band surface brightness of B ¼ 25 mag arcsec À2 .…”

Section: Densepak H Observationsmentioning

confidence: 99%

“…H i observations from the literature were drawn from the LEDA extragalactic database (Paturel et al 2003) to complement Nançay observations. Corrections were made to the raw H i data to account for velocity resolution and inhomogeneity of the various original references to produce velocity widths measured on a common system using the optical convention (v ¼ cÁk/k) at 20% and 50% of the peak flux.…”

Section: H I Values From the Literaturementioning

confidence: 99%

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The Photometric and Kinematic Structure of Face‐on Disk Galaxies. I. Sample Definition, Hα Integral Field Spectroscopy, and H i Line Widths

Andersen¹,

Bershady²,

Sparke³

et al. 2006

ASTROPHYS J SUPPL S

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We present a survey of the photometric and kinematic properties of 39 nearby, nearly face-on disk galaxies. Our approach exploits echelle-resolution integral-field spectroscopy of the H regions, obtained with DensePak on the WIYN 3.5 m telescope Bench Spectrograph. These data are complemented by H i line profiles observed with the Nançay radio telescope for 25 of these sample galaxies. Twelve additional line widths are available for sample galaxies from the literature. In this paper, we introduce the goals of this survey, define the sample selection algorithm, and amass the integral field spectroscopic data and H i line widths. We establish spatially integrated H line widths for the sample. We test the veracity of these spatially integrated line profiles by convolving narrowband imaging data with velocity field information for one of the sample galaxies, PGC 38268, and also by comparing to H i line profiles. We find H i and H line profiles to be similar in width but different in shape, indicating that we are observing different spatial distributions of ionized and neutral gas in largely axisymmetric systems with flat outer rotation curves. We also find vertical velocity dispersions of the ionized disk gas within several disk scale lengths have a median value of 18 km s À1 and an 80% range of 12Y26 km s À1 . This is only a factor of $2 larger than what is observed for neutral atomic and molecular gas. With standard assumptions for intrinsic and thermal broadening for H , this translates into a factor of 3 range in turbulent velocities, between 8 and 25 km s À1 .

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