Nuclear Starburst Activity in the Seyfert 2 Galaxy NGC 2273

Gu, Qiusheng; Shi, Lei; Lei, Shijun; Liu, Wenhao; Huang, Jianfeng

doi:10.1088/1009-9271/3/3/203

Cited by 8 publications

(7 citation statements)

References 32 publications

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“…This is practically the same age (∼ 10 8.5 yr) as derived by Ma et al (2018) for their sample of non-active galaxies with nuclear rings. This fits nicely in the idea discussed by Gu et al (2003) that tidal interaction with NGC 2273B about 10 9 yr ago may have triggered the star-formation (and also the AGN-activity) in NGC 2273.…”

Section: The Ringsupporting

confidence: 90%

Decomposition of the central structure of NGC 2273 in the NIR: A case study

Schey,

Heidt,

Pramskiy

et al. 2023

Astron Nachr

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The Seyfert 2 galaxy NGC 2273 is a prime target to explore how active nuclei can be fed. It has a star‐forming innermost nuclear ring with a radius of 0.33kpc from where material may be funneled to the supermassive black hole in its center. In this article, we discuss high‐resolution adaptive optics aided JHKs images of NGC 2273 taken with the Large Binocular Telescope. Using Galfit we decomposed the innermost part of NGC 2273 into a core, a disk, and a ring using 58 parameters, 44 of them were used to describe the ring. The stellar mass of the ring was found to be 12 , a factor of 10 higher than its molecular gas mass. A continuous gas flow via the main stellar bar of NGC 2273 during the lifetime of the bar of up to 10 is required to provide the fuel for the formation of the stars unless the star formation efficiency is on the order of 10%. This does not affect the fueling of the nuclear source as the amount of molecular gas required for this low‐luminosity active galaxy to achieve this is on the order of only.

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Section: The Ringsupporting

confidence: 90%

Decomposition of the central structure of NGC 2273 in the NIR: A case study

Schey,

Heidt,

Pramskiy

et al. 2023

Astron Nachr

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show abstract

“…The spiral arms emerge from opposite sides of an apparent bar, which thickens to become lens-like towards the center. Located well inside this bar/bulge region, at SMA = 2 (250 pc), is a bright and slightly asymmetric nuclear ring and disk (Mulchaey et al 1997;Erwin & Sparke 2003;Gu et al 2003) with similar PA and axis ratio as the outer disk (see also Petitpas & Wilson 2002;Barbosa et al 2006;Falcón-Barroso et al 2006). In the galaxy center, near the resolution limit, the brightness rises steeply.…”

Section: Ngc 1194 Ngc1194 (Figuresmentioning

confidence: 88%

The Black Hole–bulge Mass Relation in Megamaser Host Galaxies*

Läsker

Greene

Seth

et al. 2016

ApJ

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We present HST images for nine megamaser disk galaxies with the primary goal of studying photometric BH-galaxy scaling relations. The megamaser disks provide the highest-precision extragalactic BH mass measurements, while our high-resolution HST imaging affords us the opportunity to decompose the complex nuclei of their late-type hosts in detail. Based on the morphologies and shapes of the galaxy nuclei, we argue that most of these galaxies' central regions contain secularly evolving components (pseudo-bulges), and in many cases we photometrically identify co-existing "classical" bulge components as well. Using these decompositions, we draw the following conclusions: (1) The megamaser BH masses span two orders of magnitude (10 6 -10 8 M ) while the stellar mass of their spiral host galaxies are all ∼ 10 11 M within a factor of three; (2) the BH masses at a given bulge mass or total stellar mass in the megamaser host spiral galaxies tend to be lower than expected, when compared to an extrapolation of the BH-bulge relation based on early-type galaxies; (3) the observed large intrinsic scatter of BH masses in the megamaser host galaxies raises the question of whether scaling relations exist in spiral galaxies.

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“…Those galaxies (NGC 2273, UGC 3789, and NGC 6323) that we observed with APO do not have the blue coverage needed to constrain the stellar populations. In the case of NGC 2273, young stars associated with an inner ring are well-documented (Gu et al 2003). Unfortunately, we do not have much information for the other two.…”

Section: Stellar Populationsmentioning

confidence: 96%

Precise Black Hole Masses From Megamaser Disks: Black Hole-Bulge Relations at Low Mass

Greene,

Peng,

Kim

et al. 2010

Preprint

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The black hole (BH)-bulge correlations have greatly influenced the last decade of effort to understand galaxy evolution. Current knowledge of these correlations is limited predominantly to high BH masses (M BH ∼ > 10 8 M ⊙ ) that can be measured using direct stellar, gas, and maser kinematics. These objects, however, do not represent the demographics of more typical L < L * galaxies. This study transcends prior limitations to probe BHs that are an order of magnitude lower in mass, using BH mass measurements derived from the dynamics of H 2 O megamasers in circumnuclear disks. The masers trace the Keplerian rotation of circumnuclear molecular disks starting at radii of a few tenths of a pc from the central BH. Modeling of the rotation curves, presented by Kuo et al. (2010), yields BH masses with exquisite precision. We present stellar velocity dispersion measurements for a sample of nine megamaser disk galaxies based on long-slit observations using the B&C spectrograph on the Dupont telescope and the DIS spectrograph on the 3.5 m telescope at Apache Point. We also perform bulge-to-disk decomposition of a subset of five of these galaxies with SDSS imaging. The maser galaxies as a group fall below the M BH − σ * relation defined by elliptical galaxies. We show, now with very precise BH mass measurements, that the low-scatter power-law relation between M BH and σ * seen in elliptical galaxies is not universal. The elliptical galaxy M BH − σ * relation cannot be used to derive the BH mass function at low mass or the zeropoint for active BH masses. The processes (perhaps BH self-regulation or minor merging) that operate at higher mass have not effectively established an M BH − σ * relation in this low-mass regime.

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Nuclear Starburst Activity in the Seyfert 2 Galaxy NGC 2273

Cited by 8 publications

References 32 publications

Decomposition of the central structure of NGC 2273 in the NIR: A case study

Decomposition of the central structure of NGC 2273 in the NIR: A case study

The Black Hole–bulge Mass Relation in Megamaser Host Galaxies*

Precise Black Hole Masses From Megamaser Disks: Black Hole-Bulge Relations at Low Mass

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