Structure and kinematics of candidate double-barred galaxies

Моисеев, А. В.; Valdés, J. R.; Chavushyan, V.

doi:10.1051/0004-6361:20040045

Cited by 76 publications

(110 citation statements)

References 77 publications

(158 reference statements)

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“…The outer ring could also be two closely wound spiral arms which are not resolved at our resolution of 19 . The inner ring is ∼15 times larger than the small-scale (r ≈ 5 ) nuclear "mini-bar" (seen in the optical and NIR, Moiseev et al 2004), which extends along a position angle of 120…”

Section: H I Gas Morphologymentioning

confidence: 91%

Atomic Hydrogen Properties of Active Galactic Nuclei Host Galaxies: H I in 16 Nuclei of Galaxies (Nuga) Sources

Haan¹,

Schinnerer²,

Mundell³

et al. 2007

The Astronomical Journal

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We present a comprehensive spectroscopic imaging survey of the distribution and kinematics of atomic hydrogen (H i) in 16 nearby spiral galaxies hosting low luminosity active galactic nuclei (AGN), observed with high spectral and spatial resolution (resolution: ∼20 , ∼5 km s −1 ) using the NRAO Very Large Array (VLA). The sample contains a range of nuclear types ranging from Seyfert to star-forming nuclei, and was originally selected for the NUclei of GAlaxies project (NUGA)-a spectrally and spatially resolved interferometric survey of gas dynamics in nearby galaxies designed to identify the fueling mechanisms of AGN and the relation to host galaxy evolution. Here we investigate the relationship between the H i properties of these galaxies, their environment, their stellar distribution, and their AGN type. The large-scale H i morphology of each galaxy is classified as ringed, spiral, or centrally concentrated; comparison of the resulting morphological classification with the AGN type reveals that ring structures are significantly more common in low-ionization narrow emission-line regions (LINER) than in Seyfert host galaxies, suggesting a time evolution of the AGN activity together with the redistribution of the neutral gas. Dynamically disturbed H i disks are also more prevalent in LINER host galaxies than in Seyfert host galaxies. While several galaxies are surrounded by companions (some with associated H i emission), there is no correlation between the presence of companions and the AGN type (Seyfert/LINER).

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Section: H I Gas Morphologymentioning

confidence: 91%

Atomic Hydrogen Properties of Active Galactic Nuclei Host Galaxies: H I in 16 Nuclei of Galaxies (Nuga) Sources

Haan¹,

Schinnerer²,

Mundell³

et al. 2007

The Astronomical Journal

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“…We can neglect the thickness of the gaseous disk here and approximate the observed velocity fields within the commonly used tilted-rings approximation. We used the software package, written in the IDL, implementing the adaptation of this method for the ionized gas velocity fields (Moiseev et al, 2004;Moiseev, 2008, ibid references to earlier studies)).…”

Section: Moderately Inclined Disksmentioning

confidence: 99%

Ionized gas rotation curves in nearby dwarf galaxies

Моисеев

2014

Astrophys. Bull.

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Abstract. We present the results of study of the ionized gas velocity fields in 28 nearby (systemic velocity below 1000 km s −1 ) dwarf galaxies. The observations were made at the 6-m BTA telescope of the SAO RAS with the scanning Fabry-Perot interferometer in the Hα emission line. We were able to measure regular circular rotation parameters in 25 galaxies. As a rule, rotation velocities measured in H II are in a good agreement with the data on the H I kinematics at the same radii. Three galaxies reveal position angles of the kinematic axis in the H II velocity fields that strongly (tens of degrees) differ from the measurements in neutral hydrogen at large distances from the center or from the orientation of the major axis of optical isophotes. The planes of the gaseous and stellar disks in these galaxies most likely do not coincide. Namely, in DDO 99 the gaseous disk is warped beyond the optical radius, and in UGC 3672 and UGC 8508 the inclination of orbits of gas clouds varies in the inner regions of galaxies. It is possible that the entire ionized gas in UGC 8508 rotates in the plane polar to the stellar disk.

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“…accuracy of about 5 km s −1 . For a detailed discussion of the data obtained, see Moiseev et al (2004).…”

Section: Panoramic Spectroscopymentioning

confidence: 99%

The SCORPIO universal focal reducer of the 6-m telescope

2005

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Abstract. We describe the SCORPIO focal reducer that has been used since the fall of 2000 for observations on the 6-m Special Astrophysical Observatory telescope. We give parameters of the instrument in various observing modes (direct images, long-slit and multislit spectroscopy, spectropolarimetry, Fabry-Perot panoramic spectroscopy). Observations of various astronomical objects are used as examples to demonstrate the SCORPIO capabilities.

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Structure and kinematics of candidate double-barred galaxies

Cited by 76 publications

References 77 publications

Atomic Hydrogen Properties of Active Galactic Nuclei Host Galaxies: H I in 16 Nuclei of Galaxies (Nuga) Sources

Atomic Hydrogen Properties of Active Galactic Nuclei Host Galaxies: H I in 16 Nuclei of Galaxies (Nuga) Sources

Ionized gas rotation curves in nearby dwarf galaxies

The SCORPIO universal focal reducer of the 6-m telescope

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