GMOS IFU Observations of the Gas Kinematics in the Radio Galaxy Arp 102B

The goal of this work is to map the gas excitation and kinematics in the inner ~ 2 kiloparsecs of the radio-galaxy Arp 102B. Though being classified as an E0 galaxy, Arp 102B shows a nuclear gas spiral (Fathi et al., in preparation). Previous studies of the gas kinematics in nuclear spirals have led to the conclusion that these structures usually trace gas inflows (Fathi et al. 2006; [Storchi-Bergmann et al. 2007; [Riffel et al. 2008). We have used integral field spectroscopy obtained with GMOS instrument of the Gemini North telescope to investigate the nature of the nuclear spiral arms. The spectra cover the wavelength range 4400–7300 Å over a field of view of 5.″5 × 3.″9 (2.7 kpc × 1.9 kpc).

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Building-up a database of spectro-photometric standards from the UV to the NIR

Proceedings of the International Astronomical Union ◽

10.1017/s1743921310010574 ◽

2009 ◽

Vol 5 (H15) ◽

pp. 535-535 ◽

Cited By ~ 6

Author(s):

J. Vernet ◽

F. Kerber ◽

V. Mainieri ◽

T. Rauch ◽

F. Saitta ◽

...

Keyword(s):

Wavelength Range ◽

White Dwarf ◽

State Of The Art ◽

Atmospheric Models ◽

Integral Field Spectroscopy ◽

Near Ir ◽

Field Spectroscopy ◽

Wide Wavelength Range ◽

Optical Flux ◽

Integral Field

We present results of a project aimed at establishing a set of 12 spectro-photometric standards over a wide wavelength range from 320 to 2500 nm. Currently no such set of standard stars covering the near-IR is available. Our strategy is to extend the useful range of existing well-established optical flux standards (Oke 1990, Hamuy et al. 1992, 1994) into the near-IR by means of integral field spectroscopy with SINFONI at the VLT combined with state-of-the-art white dwarf stellar atmospheric models (TMAP, Holberg et al. 2008). As a solid reference, we use two primary HST standard white dwarfs GD71 and GD153 and one HST secondary standard BD+17 4708. The data were collected through an ESO “Observatory Programme” over ~40 nights between February 2007 and September 2008.

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Integral field spectroscopy of the circum-nuclear region of the radio Galaxy Pictor A

Monthly Notices of the Royal Astronomical Society ◽

10.1093/mnras/stw399 ◽

2016 ◽

Vol 458 (1) ◽

pp. 855-867 ◽

Cited By ~ 3

Author(s):

Guilherme S. Couto ◽

Thaisa Storchi-Bergmann ◽

Andrew Robinson ◽

Rogemar A. Riffel ◽

Preeti Kharb ◽

...

Keyword(s):

Radio Galaxy ◽

Nuclear Region ◽

Integral Field Spectroscopy ◽

Field Spectroscopy ◽

Integral Field

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RADIO GALAXY 3C 230 OBSERVED WITH GEMINI LASER ADAPTIVE-OPTICS INTEGRAL-FIELD SPECTROSCOPY

The Astronomical Journal ◽

10.1088/0004-6256/142/5/172 ◽

2011 ◽

Vol 142 (5) ◽

pp. 172 ◽

Cited By ~ 5

Author(s):

Eric Steinbring

Keyword(s):

Adaptive Optics ◽

Radio Galaxy ◽

Integral Field Spectroscopy ◽

Field Spectroscopy ◽

Integral Field

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Uncertainties in gas kinematics arising from stellar continuum modeling in integral field spectroscopy data: the case of NGC 2906 observed with VLT/MUSE

Astronomy and Astrophysics ◽

10.1051/0004-6361/201834478 ◽

2019 ◽

Vol 625 ◽

pp. A83 ◽

Cited By ~ 1

Author(s):

E. Bellocchi ◽

Y. Ascasibar ◽

L. Galbany ◽

S. F. Sánchez ◽

H. Ibarra–Medel ◽

...

Keyword(s):

Nearby Galaxy ◽

Ionization Mechanisms ◽

Gas Kinematics ◽

Integral Field Spectroscopy ◽

Field Spectroscopy ◽

Very Large Telescope ◽

Galaxy Kinematics ◽

Instrumental Resolution ◽

Line Fitting ◽

Integral Field

Context. Integral field spectroscopy (IFS) provides detailed information about galaxy kinematics at high spatial and spectral resolution, and the disentanglement of the gaseous and stellar components is a key step in the analysis of the data. Aims. We study how the use of several stellar-subtraction methods and line fitting approaches can affect the derivation of the main kinematic parameters (velocity and velocity dispersion fields) of the ionized gas component. Methods. The target of this work is the nearby galaxy NGC 2906, observed with the MUSE instrument at the Very Large Telescope (VLT). A sample of twelve spectra is selected from the inner (nucleus) and outer (spiral arms) regions, characterized by different ionization mechanisms. We compare three different methods to subtract the stellar continuum (FIT3D, STARLIGHT and pPXF), combined with one of the following stellar libraries: MILES, STELIB and GRANADA+MILES. Results. The choice of the stellar-subtraction method is the most important ingredient affecting the derivation of the gas kinematics, followed by the choice of the stellar library and by the line-fitting approach. In our data, typical uncertainties in the observed wavelength and width of the Hα and [NII] lines are of the order of ⟨δλ⟩rms ∼ 0.1 Å and ⟨δσ⟩rms ∼ 0.2 Å (i.e., ∼5 and 10 km s−1, respectively). The results obtained from the [NII] line seem to be slightly more robust, as it is less affected by stellar absorption than Hα. All methods considered yield statistically consistent measurements once a mean systemic contribution Δλ¯ = Δσ¯ = 0.2 ΔMUSE is added in quadrature to the line-fitting errors, where ΔMUSE = 1.1 Å ∼50 km s−1, which denotes the instrumental resolution of the MUSE spectra. Conclusions. Although the subtraction of the stellar continuum is critical in order to recover line fluxes, any method (including none) can be used to measure the gas kinematics, as long as an additional component, Δλ¯ = Δσ¯ = 0.2 ΔMUSE, is added to the error budget.

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Molecular and ionised gas kinematics in a sample of nearby active galaxies

Proceedings of the International Astronomical Union ◽

10.1017/s1743921320001520 ◽

2020 ◽

Vol 15 (S359) ◽

pp. 366-368

Author(s):

Marina Bianchin ◽

Rogemar A. Riffel ◽

Thaisa Storchi-Bergmann ◽

Rogério Riffel ◽

Astor J. Schonell

Keyword(s):

Seyfert Galaxies ◽

Active Galaxies ◽

Molecular Gas ◽

Line Profiles ◽

Molecular Outflows ◽

Gas Kinematics ◽

Integral Field Spectroscopy ◽

Field Spectroscopy ◽

Spatial Coverage ◽

Integral Field

AbstractWe used Gemini NIFS integral field spectroscopy to analyse the molecular and ionised gas kinematics of six nearby (z ⩽ 0.015) Seyfert galaxies with a spatial coverage of 0.1 – 0.6 kpc2. By fitting the emission-line profiles using multiple Gaussian components we determined that the ionised and hot molecular gas kinematics are dominated by gas outflows and rotation, respectively, even though three objects also present molecular outflows.

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The stellar structure of early-type galaxies: a wide-field Mitchell Spectrograph view

Proceedings of the International Astronomical Union ◽

10.1017/s174392131601108x ◽

2016 ◽

Vol 11 (S321) ◽

pp. 288-288

Author(s):

N. F. Boardman ◽

A. Weijmans ◽

R. C. E. van den Bosch ◽

L. Zhu ◽

A. Yildirim ◽

...

Keyword(s):

Effective Radius ◽

Stellar Structure ◽

Wide Field ◽

Early Type ◽

Integral Field Spectroscopy ◽

Field Spectroscopy ◽

Integral Field ◽

Made In

Much progress has been made in recent years towards understanding how early-type galaxies (ETGs) form and evolve. SAURON (Bacon et al. 2001) integral-field spectroscopy from the ATLAS3D survey (Cappellari et al. 2011) has suggested that less massive ETGs are linked directly to spirals, whereas the most massive objects appear to form from a series of merging and accretion events (Cappellari et al. 2013). However, the ATLAS3D data typically only extends to about one half-light radius (or effective radius, Re), making it unclear if this picture is truly complete.

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