The EDGE–CALIFA survey: validating stellar dynamical mass models with CO kinematics

Abstract Deriving circular velocities of galaxies from stellar kinematics can provide an estimate of their total dynamical mass, provided a contribution from the velocity dispersion of the stars is taken into account. Molecular gas (e.g. CO), on the other hand, is a dynamically cold tracer and hence acts as an independent circular velocity estimate without needing such a correction. In this paper, we test the underlying assumptions of three commonly used dynamical models, deriving circular velocities from stellar kinematics of 54 galaxies (S0-Sd) that have observations of both stellar kinematics from the Calar Alto Legacy Integral Field Area (CALIFA) survey, and CO kinematics from the Extragalactic Database for Galaxy Evolution (EDGE) survey. We test the asymmetric drift correction (ADC) method, as well as Jeans, and Schwarzschild models. The three methods each reproduce the CO circular velocity at 1Re to within 10 per cent. All three methods show larger scatter (up to 20 per cent) in the inner regions (R < 0.4Re) that may be due to an increasingly spherical mass distribution (which is not captured by the thin disc assumption in ADC), or non-constant stellar M/L ratios (for both the JAM and Schwarzschild models). This homogeneous analysis of stellar and gaseous kinematics validates that all three models can recover Mdyn at 1Re to better than 20 per cent, but users should be mindful of scatter in the inner regions where some assumptions may break down.

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CALIFA, the Calar Alto Legacy Integral Field Area survey

Astronomy and Astrophysics ◽

10.1051/0004-6361/201117353 ◽

2012 ◽

Vol 538 ◽

pp. A8 ◽

Cited By ~ 629

Author(s):

S. F. Sánchez ◽

R. C. Kennicutt ◽

A. Gil de Paz ◽

G. van de Ven ◽

J. M. Vílchez ◽

...

Keyword(s):

Area Survey ◽

Field Area ◽

Integral Field ◽

Calar Alto

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Widespread star formation inside galactic outflows

Monthly Notices of the Royal Astronomical Society ◽

10.1093/mnras/stz564 ◽

2019 ◽

Vol 485 (3) ◽

pp. 3409-3429 ◽

Cited By ~ 26

Author(s):

R Gallagher ◽

R Maiolino ◽

F Belfiore ◽

N Drory ◽

R Riffel ◽

...

Keyword(s):

Star Formation ◽

Galaxy Evolution ◽

Scaling Relations ◽

Molecular Gas ◽

Distant Galaxies ◽

Major Mode ◽

Galactic Outflows ◽

The Universe ◽

Integral Field

Abstract Several models have predicted that stars could form inside galactic outflows and that this would be a new major mode of galaxy evolution. Observations of galactic outflows have revealed that they host large amounts of dense and clumpy molecular gas, which provide conditions suitable for star formation. We have investigated the properties of the outflows in a large sample of galaxies by exploiting the integral field spectroscopic data of the large MaNGA-SDSS4 galaxy survey. We find evidence for prominent star formation occurring inside at least 30 per cent of the galactic outflows in our sample, whilst signs of star formation are seen in up to half of the outflows. We also show that even if star formation is prominent inside many other galactic outflows, this may have not been revealed as the diagnostics are easily dominated by the presence of even faint active galactic nucleus and shocks. If very massive outflows typical of distant galaxies and quasars follow the same scaling relations observed locally, then the star formation inside high-z outflows can be up to several 100 $\rm M_{\odot }~yr^{-1}$ and could contribute substantially to the early formation of the spheroidal component of galaxies. Star formation in outflows can also potentially contribute to establishing the scaling relations between black holes and their host spheroids. Moreover, supernovae exploding on large orbits can chemically enrich in situ and heat the circumgalactic and intergalactic medium. Finally, young stars ejected on large orbits may also contribute to the reionization of the Universe.

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

Astronomy and Astrophysics ◽

10.1051/0004-6361/201834255 ◽

2019 ◽

Vol 622 ◽

pp. A128 ◽

Cited By ~ 8

Author(s):

Nastaran Fazeli ◽

Gerold Busch ◽

Mónica Valencia-S. ◽

Andreas Eckart ◽

Michal Zajaček ◽

...

Keyword(s):

Star Formation ◽

Emission Line ◽

Galaxy Evolution ◽

Large Scale ◽

Near Infrared ◽

Molecular Gas ◽

Nuclear Region ◽

Stellar Kinematics ◽

Hydrogen Recombination ◽

Ngc 1365

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 MBH − σ* and the broad components of hydrogen recombination lines, we find a black-hole mass of (5 − 10)×106 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)×108 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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Future prospects in observational galaxy evolution: towards increased resolution

Proceedings of the International Astronomical Union ◽

10.1017/s1743921313005395 ◽

2012 ◽

Vol 8 (S295) ◽

pp. 368-375

Author(s):

Karl Glazebrook

Keyword(s):

Galaxy Evolution ◽

High Redshift ◽

Personal Perspective ◽

Molecular Gas ◽

Future Prospects ◽

Kinematic Data ◽

Near Ir ◽

Large Numbers ◽

Ir Spectroscopic ◽

Integral Field

AbstractFuture prospects in observational galaxy evolution are reviewed from a personal perspective. New insights will especially come from high-redshift integral field kinematic data and similar low-redshift observations in very large and definitive surveys. We will start to systematically probe the mass structures of galaxies and their haloes via lensing from new imaging surveys and upcoming near-IR spectroscopic surveys will finally obtain large numbers of rest frame optical spectra at high-redshift routinely. ALMA will be an important new ingredient, spatially resolving the molecular gas fuelling the high star-formation rates seen in the early Universe.

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Galactic dynamics and DM profile of NGC1380 with ALMA and VLT/MUSE

Proceedings of the International Astronomical Union ◽

10.1017/s1743921319008767 ◽

2019 ◽

Vol 14 (S353) ◽

pp. 248-252

Author(s):

Takafumi Tsukui ◽

Satoru Iguchi ◽

Kyoko Onishi

Keyword(s):

Dark Matter ◽

Galaxy Evolution ◽

Neutral Hydrogen ◽

Hydrogen Gas ◽

Large Field ◽

Molecular Gas ◽

Early Type ◽

Stellar Kinematics ◽

Gas Kinematics ◽

The Galaxy

AbstractIn order to understand the interaction between dark matter and baryonic matter in the galaxy evolution history, it is fundamental to constrain dark matter (DM) distribution in galaxies. However, it is difficult to constrain DM profile in the central region of early type galaxy because of the lack of extended neutral hydrogen gas and the degeneracy between dynamical stellar M/L and DM profile. To resolve this difficulty, we conducted combined analysis of ALMA cold molecular gas kinematics and MUSE stellar kinematics of early type fast rotator galaxy NGC1380. In addition, we used HST image to trace the stellar luminosity distribution. With the help of high resolution of ALMA image and large field of view of MUSE, we derived the central BH mass, stellar bulge, disk and DM profile.

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CALIFA, the Calar Alto Legacy Integral Field Area survey

Astronomy and Astrophysics ◽

10.1051/0004-6361/201425080 ◽

2015 ◽

Vol 576 ◽

pp. A135 ◽

Cited By ~ 116

Author(s):

R. García-Benito ◽

S. Zibetti ◽

S. F. Sánchez ◽

B. Husemann ◽

A. L. de Amorim ◽

...

Keyword(s):

Area Survey ◽

Field Area ◽

Integral Field ◽

Calar Alto

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Stellar Dynamical Models for 797 z ∼ 0.8 Galaxies from LEGA-C

The Astrophysical Journal ◽

10.3847/1538-4357/ac1f29 ◽

2021 ◽

Vol 923 (1) ◽

pp. 11

Author(s):

Josha van Houdt ◽

Arjen van der Wel ◽

Rachel Bezanson ◽

Marijn Franx ◽

Francesco d’Eugenio ◽

...

Keyword(s):

Galaxy Evolution ◽

Hubble Space Telescope ◽

Morphological Type ◽

Dynamical Structure ◽

Stellar Kinematics ◽

Dynamical Mass ◽

Star Forming ◽

Additional Information ◽

Spatially Resolved ◽

Look Back

Abstract We present spatially resolved stellar kinematics for 797 z = 0.6–1 galaxies selected from the LEGA-C survey and construct axisymmetric Jeans models to quantify their dynamical mass and degree of rotational support. The survey is K s -band selected, irrespective of color or morphological type, and allows for a first assessment of the stellar dynamical structure of the general L* galaxy population at large look-back time. Using light profiles from Hubble Space Telescope imaging as a tracer, our approach corrects for observational effects (seeing convolution and slit geometry), and uses well-informed priors on inclination, anisotropy, and a non-luminous mass component. Tabulated data include total mass estimates in a series of spherical apertures (1, 5, and 10 kpc; 1 × and 2 × R e), as well as rotational velocities, velocity dispersions, and anisotropy. We show that almost all star-forming galaxies and ∼50% of quiescent galaxies are rotation dominated, with deprojected V/σ ∼ 1–2. Revealing the complexity in galaxy evolution, we find that the most massive star-forming galaxies are among the most rotation dominated, and the most massive quiescent galaxies among the least rotation-dominated galaxies. These measurements set a new benchmark for studying galaxy evolution, using stellar dynamical structure for galaxies at large look-back time. Together with the additional information on stellar population properties from the LEGA-C spectra, the dynamical mass and V/σ measurements presented here create new avenues for studying galaxy evolution at large look-back time.

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NIR–IFU observations of the merger remnant NGC 34

Proceedings of the International Astronomical Union ◽

10.1017/s1743921320002033 ◽

2019 ◽

Vol 15 (S359) ◽

pp. 355-356

Author(s):

Juliana C. Motter ◽

Rogério Riffel ◽

Tiago V. Ricci ◽

Natacha Z. Dametto ◽

Luis G. Dahmer-Hahn ◽

...

Keyword(s):

Galaxy Evolution ◽

Adaptive Optics ◽

Near Infrared ◽

Galactic Nuclei ◽

Molecular Gas ◽

The Galaxy ◽

Open Issue ◽

Nuclear Regions ◽

Disc Galaxies ◽

Integral Field

AbstractUnderstanding the interplay between the phenomena of active galactic nuclei (AGN) and starbursts remains an open issue in studies of galaxy evolution. The galaxy NGC 34 is the remnant of the merger of two former gas-rich disc galaxies and it also hosts a strong nuclear starburst. In this work, we map the ionized and molecular gas present in the nuclear regions of the galaxy NGC 34 using adaptive optics (AO) assisted near infrared (NIR) integral field unity (IFU) observations. Our main goals are to better constrain the energy source of this object and to use NGC 34 as a laboratory to probe the AGN-starburst connection in the context of galaxy evolution and AGN feeding and feedback processes.

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