Halpha Nuclear Geyser (Bipolar Outflow) from the Barred Galaxy NGC 1415 (ESO 482-G033)

Abstract

A long slit spectrum from the barred galaxy NGC 1415 has been obtained with the 2.1m Guillermo Haro telescope in Cananea, Mexico at position angle 155d (EofN) and shows the kinematics of Na I D lines (in absorption) and Halpha, 6562.8 A, [NII] 6548 A, [NII] 6584 A, [SII] 6716 A, and [SII] 6731 A lines in emission from the central regions and the disk. Our previous Halpha continuum-free imaging of the central region showed mainly two central bright Halpha knots straddling the nucleus, and Halpha emission regions along the south-east and north-west inner spiral arms. Velocities of the Na I D absorption lines are taken as representative of the rotation curve of NGC 1415. Our kinematical data indicates that the central bright Halpha straddling the nucleus have velocities in excess of the Na I D velocities. We interpret these velocity excesses of the central bright Halpha knots as due to a geyser (nuclear bipolar outflow) with V_outflow 140 km/s at a P.A.+165d (EofN). The axis of this outflow, is not along the rotation axis of the disk of NGC 1415 (if it were, it would be at P.A.+238d (EofN)). Additionally we have determined Omega_{gas}, (radial resonances) kappa(R) and estimated the value of the pattern angular speed of an inner boxy stellar bar in NGC 1415, Omega_{bar}, from the Na I D rotation curve assuming Ratio of CR/a_{bar} = 1, Omega_{bar} = 134 km/s.

arXiv comment18 pages, 6 figures, accepted for publication in PASP (100815) June 8, 2019

References in corpus (32)

• Measuring Reddening with SDSS Stellar Spectra and Recalibrating SFD
• A Relationship Between Nuclear Black Hole Mass and Galaxy Velocity Dispersion
• The VizieR database of Astronomical Catalogues
• The M(BH)-Sigma Relation for Supermassive Black Holes
• Black Hole Demographics from the M(BH)-sigma Relation
• The Extended 12 Micron Galaxy Sample
• Jet directions in Seyfert galaxies
• The Southern Sky Redshift Survey
• The Carnegie-Irvine Galaxy Survey. I. Overview and Atlas of Optical Images
• Near-IR Atlas of S0-Sa galaxies (NIRS0S)
• Characterization of galactic bars from 3.6 $\mu$m S${}^4$G imaging
• Bar pattern speeds in CALIFA galaxies: I. Fast bars across the Hubble sequence
• A Search for "Dwarf" Seyfert Nuclei. VII. A Catalog of Central Stellar Velocity Dispersions of Nearby Galaxies
• Model-based pattern speed estimates for 38 barred galaxies
• Orbits Supporting Bars within Bars
• The Carnegie-Irvine Galaxy Survey. II. Isophotal Analysis
• The Relative Orientation of Nuclear Accretion and Galaxy Stellar Disks in Seyfert Galaxies
• The Distance to M51
• Pattern Speeds of Bars and Spiral Arms From H-alpha Velocity Fields
• On the relevance of the Tremaine-Weinberg method applied to H-alpha velocity field.Pattern speeds determination in M100 (NGC 4321)
• A Comparison of Radio Axis with Host Galaxy Plane Axis in Seyfert Galaxies
• On the Lengths, Colors and Ages of 18 Face-On Bars
• Quantifying Resonant Structure in NGC 6946 from Two-dimensional Kinematics
• Star Formation History and Extinction in the central kpc of M82-like Starbursts
• Fabry Perot Halpha Observations of the Barred Spiral NGC 3367
• On the bar pattern speed determination of NGC 3367
• Investigating early-type galaxy evolution with a multiwavelength approach. II. The UV structure of 11 galaxies with Swift-UVOT
• Central Activity in the Barred Galaxy NGC 3367
• The HI content of the Eridanus group of galaxies
• VLA High Resolution 1.4 and 8.4 GHz Mapping of the Barred Galaxy NGC 3367
• Companions of Bright Barred Shapley Ames Galaxies
• The Remarkable Central Structure of the Barred Galaxy NGC 1415

Cited by in corpus (2)

• WALLABY Pre-Pilot Survey: Radio Continuum Properties of the Eridanus Supergroup
• HI 21 cm Extended Structures to the North-East, and South-West of NGC 5595: VLA Observations of the Disk Galaxy Pair NGC 5595 and NGC 5597