Navegação por Assunto "Infrared: galaxies"
Resultados 1-20 de 43
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AGN–starburst connection in NGC 7582 : Gemini near-infrared spectrograph integral field unit observations
(2009) [Artigo de periódico]We analyse two-dimensional near-infrared K-band spectra from the inner 660 × 315 pc² of the Seyfert galaxy NGC7582 obtained with the Gemini near-infrared spectrograph integral field unit at a spatial resolution of ≈50 pc ... -
An embedded active nucleus in the OH megamaser galaxy IRAS16399-0937
(2015) [Artigo de periódico]We present a multiwavelength study of the OH megamaser galaxy IRAS16399−0937, based on new Hubble Space Telescope (HST)/Advanced Camera for Surveys F814W and Hα+[N ii] images and archive data from HST, Two Micron All Sky ... -
Circumnuclear star formation in Mrk 42 mapped with Gemini Near-infrared Integral Field Spectrograph
(2018) [Artigo de periódico]We present Gemini Near-infrared Integral Field Spectrograph (NIFS) observations of the inner 1.5 × 1.5 kpc2 of the narrow-line Seyfert 1 galaxy Mrk 42 at a spatial resolution of 60 pc and spectral resolution of 40 kms−1. ... -
Compact molecular disc and ionized gas outflows within 350 pc of the active nucleus of Mrk 1066
(2011) [Artigo de periódico]We present stellar and gaseous kinematics of the inner ≈350-pc radius of the Seyfert galaxy Mrk 1066 derived from J and Kl bands data obtained with the Gemini’s Near-Infrared Integral Field Spectrograph (NIFS) at a spatial ... -
A correlation between the stellar and [Fe II] velocity dispersions in active galaxies
(2013) [Artigo de periódico]We use near-infrared (near-IR) spectroscopic data from the inner few hundred parsecs of a sample of 47 active galaxies to investigate possible correlations between the stellar velocity dispersion (σ ), obtained from the ... -
Differences between CO- and calcium triplet-derived velocity dispersions in spiral galaxies : evidence for central star formation?
(2015) [Artigo de periódico]We examine the stellar velocity dispersions (σ) of a sample of 48 galaxies, 35 of which are spirals, from the Palomar nearby galaxy survey. It is known that for ultra-luminous infrared galaxies (ULIRGs) and merger remnants, ... -
Disentangling the near-infrared continuum spectral components of the inner 500 pc of Mrk 573 : two-dimensional maps
(2017) [Artigo de periódico]We present a near-infrared (near-IR) study of the spectral components of the continuum in the inner 500×500 pc2 of the nearby Seyfert galaxy Mrk 573 using adaptive optics near-IR integral field spectroscopy with the ... -
Dust obscuration in starburst galaxies from near-infrared spectroscopy
(1996) [Artigo de periódico]We present new observations of the near-infrared hydrogen recombination lines Paβ and Bry in the central starburst regions of 13 galaxies. The near-infrared data are supplemented with data on the optical Balmer line emission ... -
Extended gas in Seyfert galaxies : near-infrared observations of 15 active nuclei
(2000) [Artigo de periódico]Results from an analysis of low-resolution (R ~ 250) near-infrared long-slit spectra covering simultaneously the I, J, H and K bands, for a sample of 15 Seyfert galaxies and the NGC5253 starburst nucleus, are presented. ... -
Extended gas in Seyfert galaxies: near-infrared observations of NGC 2110 and Circinus
(1999) [Artigo de periódico]We present results of near-IR long-slit spectroscopy in the J and K bands of the Seyfert 2 galaxies NGC2110 and Circinus. Our goal is to investigate the gaseous distribution, excitation, reddening and kinematics, looking ... -
Extreme galactic wind and Wolf-Rayet features in infrared mergers and infrared quasi-stellar objects
(2003) [Artigo de periódico]We report, as a part of a long-term study of infrared (IR) mergers and IR quasi-stellar objects (QSOs), detailed spectroscopic evidence for outflow (OF) and Wolf–Rayet (WR) features in the nearby mergers NGC4038/39 and ... -
Feeding versus feedback in active galactic nuclei from near-infrared integral field spectroscopy – X. NGC 5929
(2015) [Artigo de periódico]We present near-infrared emission-line flux distributions, excitation and kinematics, as well as stellar kinematics, of the inner 520 × 520 pc2 of the Seyfert 2 galaxy NGC 5929. The observations were performed with Gemini’s ... -
Feeding versus feedback in AGN from near-infrared IFU observations XI : NGC 2110
(2015) [Artigo de periódico]We present a two-dimensional mapping of the gas flux distributions, as well as of the gas and stellar kinematics in the inner 220 pc of the Seyfert galaxy NGC 2110, using K-band integral field spectroscopy obtained with ... -
Feeding versus feedback in AGNs from near-infrared IFU observations : the case of Mrk 79
(2013) [Artigo de periódico]We have mapped the gaseous kinematics and the emission-line flux distributions and ratios from the inner≈680 pc radius of the Seyfert 1 galaxy Mrk 79, using two-dimensional (2D) nearinfrared J- and Kl-band spectra obtained ... -
First detection of the 448 GHz H2O transition in space
(2017) [Artigo de periódico]We present the first detection of the ortho-H2O 423330 transition at 448 GHz in space. We observed this transition in the local (z = 0:010) luminous infrared (IR) galaxy ESO 320-G030 (IRAS F11506-3851) using the Atacama ... -
Gemini near-infrared integral field spectroscopy of the narrow-line region of ESO428-G14 : kinematics, escitation and the role of the radio jet
(2006) [Artigo de periódico]We present two-dimensional (2D) gas kinematics and excitation of the inner 300 pc of the Seyfert galaxy ESO 428−G14 at a sampling of 14 pc², from near-infrared spectroscopic observations at R≈6000 obtained with the Integral ... -
Gemini NIFS survey of feeding and feedback processes in nearby active galaxies : II. The sample and surface mass density profilesthe hidden monster and its outflow
(2018) [Artigo de periódico]We present and characterize a sample of 20 nearby Seyfert galaxies selected for having BAT 14–195 keV luminosities LX ≥ 1041.5 erg s−1, redshift z ≤ 0.015, being accessible for observations with the Gemini Near-Infrared ... -
Gemini NIFS survey of feeding and feedback processes in nearby active galaxies : I. Stellar kinematics
(2017) [Artigo de periódico]We use the Gemini Near-Infrared Integral Field Spectrograph (NIFS) to map the stellar kinematics of the inner few hundred parsecs of a sample of 16 nearby Seyfert galaxies, at a spatial resolution of tens of parsecs and ... -
Infrared emission in Seyfert 2 galaxies : reprocessed radiation from a dusty torus?
(1992) [Artigo de periódico]The nature of the infrared continuum in Seyfert 2 galaxies is not well understood. An attractive model is one in which dust grains near the nucleus are heated by optical and ultraviolet photons from a central source and ... -
Intermediate-age stars as origin of the low-velocity dispersion nuclear ring in Mrk 1066
(2010) [Artigo de periódico]We report the first two-dimensional stellar population synthesis in the near-infrared of the nuclear region of an active galaxy, namely, Mrk 1066. We have used integral field spectroscopy with adaptative optics at the ...