A SINFONI view of the nuclear activity and circumnuclear star formation in NGC 4303

Riffel, Rogemar A.; Colina, L.; Storchi‐Bergmann, Thaisa; López, Javier Piqueras; Arribas, S.; Riffel, Rogemar A.; Pastoriza, M. G.; Sales, Dinalva A.; Dametto, N. Z.; Labiano, Á.; Davies, R. I.

doi:10.1093/mnras/stw1609

Cited by 30 publications

(37 citation statements)

References 75 publications

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“…5 , and derive the mass to be M H ii ∼ 4.3 × 10 6 M . This is consistent with typical masses found in nearby galaxies by the AGNIFS group (Riffel et al 2016, and references therein) of 10 < M H 2 < 10 3 M and 10 4 < M H ii < 10 7 M . For NUGA sources, cold gas masses are estimated from the CO-emissions to be in ranges 10 8 < M H 2 < 10 10 M .…”

Section: Gas Massessupporting

confidence: 91%

Near-infrared observations of star formation and gas flows in the NUGA galaxy NGC 1365

Fazeli

Busch

Valencia-S.

et al. 2019

A&A

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In the framework of understanding the gas and stellar kinematics and their relations to AGNs and galaxy evolution scenarios, we present spatially resolved distributions and kinematics of the stars and gas in the central ∼ 800-pc radius of the nearby Seyfert galaxy NGC 1365. We obtained H + K-and K-band near-infrared (NIR) integral-field observations from VLT/SINFONI. Our results reveal strong broad and narrow emission-line components of ionized gas (hydrogen recombination lines Paα and Brγ) in the nuclear region, as well as hot dust with a temperature of ∼ 1300 K, both typical for type-1 AGNs. From M BH − σ * and the broad components of hydrogen recombination lines, we find a black-hole mass of (5 − 10) × 10 6 M . In the central ∼ 800 pc, we find a hot molecular gas mass of ∼ 615 M , which corresponds to a cold molecular gas reservoir of (2 − 8) × 10 8 M . However, there is a molecular gas deficiency in the nuclear region. The gas and stellar-velocity maps both show rotation patterns consistent with the large-scale rotation of the galaxy. However, the gaseous and stellar kinematics show deviations from pure disk rotation, which suggest streaming motions in the central < 200 pc and a velocity twist at the location of the ring which indicates deviations in disk and ring rotation velocities in accordance with published CO kinematics. We detect a blueshifted emission line split in Paα, associated with the nuclear region only. We investigate the star-formation properties of the hot spots in the circumnuclear ring which have starburst ages of 10 Myr and find indications for an age gradient on the western side of the ring. In addition, our high-resolution data reveal further substructure within this ring which also shows enhanced star forming activity close to the nucleus.

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Section: Gas Massessupporting

confidence: 91%

Near-infrared observations of star formation and gas flows in the NUGA galaxy NGC 1365

Fazeli

Busch

Valencia-S.

et al. 2019

A&A

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“…Using the areas quoted in Table 3 for the regions occupied by the ionized gas we estimate total star formation rates for the area covered by our observations (radius of ≈ 300 pc) in the range 10 −4 -10 −2 M ⊙ yr −1 (Table 3). These values are within the range of values observed for the inner few 100 pc of galaxies and circumnuclear star-forming regions (Shi et al 2006;Dors et al 2008;Falcón-Barroso et al 2014;Tsai & Hwang 2015;Riffel et al 2016).…”

Section: Total Gas Masses and Implied Star Formation Ratessupporting

confidence: 84%

Gemini NIFS survey of feeding and feedback in nearby active galaxies – III. Ionized versus warm molecular gas masses and distributions

Schönell

Storchi‐Bergmann

Riffel

et al. 2019

Monthly Notices of the Royal Astronomical Society

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We have used the Gemini Near-Infrared Integral Field Spectrograph (NIFS) in the J and K bands to map the distribution, excitation and kinematics of the ionized H ii and warm molecular gas H 2 , in the inner few 100 pc of 6 nearby active galaxies: NGC 788, Mrk 607, NGC 3227, NGC 3516, NGC 5506, NGC 5899. For most galaxies, this is the first time that such maps have been obtained. The ionized and H 2 gas show distinct kinematics: while the H 2 gas is mostly rotating in the galaxy plane with low velocity dispersion (σ), the ionized gas usually shows signatures of outflows associated with higher σ values, most clearly seen in the [Fe ii] emission line. These two gas species also present distinct flux distributions: the H 2 is more uniformly spread over the whole galaxy plane, while the ionized gas is more concentrated around the nucleus and/or collimated along the ionization axis of its Active Galactic Nucleus (AGN), presenting a steeper gradient in the average surface mass density profile than the H 2 gas. The total H ii masses cover the range 2 × 10 5 − 2 × 10 7 M ⊙ , with surface mass densities in the range 3-150 M ⊙ pc −2 , while for the warm H 2 the values are 10 3−4 times lower. We estimate that the available gas reservoir is at least ≈ 100 times more massive than needed to power the AGN. If this gas form new stars the star-formation rates, obtained from the Kennicutt-schmidt scalling relation, are in the range 1-260× 10 −3 M ⊙ yr −1 . But the gas will also -at least in part -be ejected in the form of the observed otflows.

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“…The estimated mass of ionized gas is M HII =7.5×10 5 M ⊙ , which is similar to the values previously found for rings of circumnuclear star forming regions (e.g. Riffel et al 2016Riffel et al , 2009Hennig et al 2018).…”

Section: Star Forming Regionssupporting

confidence: 88%

Star formation and gas inflows in the OH megamaser galaxy IRAS03056+2034

Hekatelyne

Riffel

Sales

et al. 2018

Monthly Notices of the Royal Astronomical Society

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We have obtained observations of the OH Megamaser galaxy IRAS03056+0234 using Gemini Multi-Object Spectrograph (GMOS) Integral Field Unit (IFU), Very Large Array (VLA) and Hubble Space Telescope (HST). The HST data reveals spiral arms containing knots of emission associated to star forming regions. The GMOS-IFU data cover the spectral range of 4500 to 7500Å at a velocity resolution of 90 km s −1 and spatial resolution of 506 pc. The emission-line flux distributions reveal a ring of star forming regions with radius of 786 pc centred at the nucleus of the galaxy, with an ionized gas mass of 1.2× 10 8 M ⊙ , an ionizing photon luminosity of log Q[H + ]=53.8 and a star formation rate of 4.9 M ⊙ yr −1 . The emission-line ratios and radio emission suggest that the gas at the nuclear region is excited by both starburst activity and an active galactic nucleus. The gas velocity fields are partially reproduced by rotation in the galactic plane, but show, in addition, excess redshifts to the east of the nucleus, consistent with gas inflows towards the nucleus, with velocity of ∼45 km s −1 and a mass inflow rate of ∼7.7×10 −3 M ⊙ yr −1 .

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A SINFONI view of the nuclear activity and circumnuclear star formation in NGC 4303

Cited by 30 publications

References 75 publications

Near-infrared observations of star formation and gas flows in the NUGA galaxy NGC 1365

Near-infrared observations of star formation and gas flows in the NUGA galaxy NGC 1365

Gemini NIFS survey of feeding and feedback in nearby active galaxies – III. Ionized versus warm molecular gas masses and distributions

Star formation and gas inflows in the OH megamaser galaxy IRAS03056+2034

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