MASCOT: an ESO–ARO legacy survey of molecular gas in nearby SDSS-MaNGA galaxies – I. First data release, and global and resolved relations between H2 and stellar content

Wylezalek, Dominika; Cicone, C.; Belfiore, Francesco; Bertemes, Caroline; Cazzoli, S.; Wagg, Jeff; Wang, Wuji; Aravena, M.; Maiolino, R.; Martín, S.; Bothwell, M. S.; Brownstein, Joel R.; Bundy, Kevin; Breuck, C. De

doi:10.1093/mnras/stab3356

Cited by 6 publications

(15 citation statements)

References 75 publications

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“…Our primary dataset is the MaNGA-ARO Survey of CO Targets (MASCOT; first data release presented in Wylezalek et al 2022). MASCOT is an ESO Public Spectroscopic Survey using the Arizona Radio Observatory (ARO) to conduct single-dish CO(1-0) followup observations of galaxies with existing optical-IFU data from the Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey, which will be summarised below in Section 2.3.…”

Section: Mascotmentioning

confidence: 99%

“…While the Accurso et al ( 2017) 𝛼 CO conversion was established based on the Pettini & Pagel (2004) calibrator, metallicities based upon it are not included in the Pipe3D catalog. Wylezalek et al (2022) therefore uses the Pipe3D oxygen abundances based on the Maiolino et al (2008) prescription, and corrects for a constant offset of 0.05 with respect to Pettini & Pagel (2004) metallicities within our mass range (Sánchez et al 2017). In this work, we derive H 2 masses in two ways: firstly, following Wylezalek et al (2022) with the metallicity-dependent CO-to-H 2 conversion outlined above, and secondly, using a constant 𝛼 CO factor instead.…”

Section: Mascotmentioning

confidence: 99%

“…The field-of-view at the CO(1-0) frequency is ∼ 50", broadly similar to the ARO beam size of ∼ 55" from our MASCOT observations. Galaxy-integrated measurements from ALMaQUEST are included in Wylezalek et al (2022) along with the first MASCOT data release.…”

Section: Almaquestmentioning

confidence: 99%

“…Complementing the ALMaQUEST and EDGE-CALIFA survey, Wylezalek et al (2022) recently published the first data release of our MaNGA-ARO Survey of CO Targets (MASCOT). Using 12m single-dish 12 CO(1-0) observations with the Arizona Radio Observatory, we have collected data for 187 galaxies from the MaNGA survey (Mapping Nearby Galaxies at Apache Point Observatory; Bundy et al 2015) to date, selected to span a broad range in stellar masses (∼ 1.5 dex) and sSFR = SFR/M ★ (> 3 dex).…”

Section: Introductionmentioning

confidence: 99%

“…Further observations are still ongoing. We note that MASCOT is highly complementary to ALMaQUEST in terms of the field of view probed by the CO observations (while drawing from the identical underlying optical-IFU survey), and therefore we include the public global ALMaQUEST data in Wylezalek et al (2022) together with the MASCOT DR1 for convenience.…”

Section: Introductionmentioning

confidence: 99%

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MASCOT: molecular gas depletion times and metallicity gradients – evidence for feedback in quenching active galaxies

Bertemes

Wylezalek

Albán

et al. 2022

Monthly Notices of the Royal Astronomical Society

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We present results from the first public data release of the MaNGA-ARO Survey of CO Targets (MASCOT), focussing our study on galaxies whose star-formation rates and stellar masses place them below the ridge of the star-forming Main Sequence. In optically-selected type 2 AGN/LINERs/Composites, we find an empirical relation between gas-phase metallicity gradients ∇Z and global molecular gas depletion times $t_{\rm dep} = M_{\rm H_2} /{\rm SFR}$ with “more quenched” systems showing flatter/positive gradients. Our results are based on the O3N2 metallicity diagnostic (applied to star-forming regions within a given galaxy) which was recently suggested to also be robust against emission by diffuse ionised gas (DIG) and low-ionisation nuclear emission regions (LINERs). We conduct a systematic investigation into possible drivers of the observed ∇Z − tdep relation (ouflows, gas accretion, in-situ star formation, mergers, and morphology). We find a strong relation between ∇Z or tdep and centralised outflow strength traced by the [O iii] velocity broadening. We also find signatures of suppressed star-formation in the outskirts in AGN-like galaxies with long depletion times and an enhancement of metals in the outer regions. We find no evidence of inflows impacting the metallicity gradients, and none of our results are found to be significantly affected by merger activity or morphology. We thus conclude that the observed ∇Z − tdep relation may stem from a combination of metal redistribution via weak feedback, and a connection to in-situ star formation via a resolved mass-metallicity-SFR relation.

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Section: Mascotmentioning

confidence: 99%

Section: Mascotmentioning

confidence: 99%

Section: Almaquestmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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MASCOT: molecular gas depletion times and metallicity gradients – evidence for feedback in quenching active galaxies

Bertemes

Wylezalek

Albán

et al. 2022

Monthly Notices of the Royal Astronomical Society

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Classifying the full SDSS-IV MaNGA Survey using optical diagnostic diagrams: Presentation of AGN catalogs in flexible apertures

M.¹,

Wylezalek²

2023

A&A

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Accurate active galactic nucleus (AGN) identifications in large galaxy samples are crucial for the assessment of the role of AGN and AGN feedback in the co-evolution of galaxies and their central supermassive black holes. Emission-line flux-ratio diagnostics are commonly used to identify AGN in optical spectra. New large samples of integral field unit observations allow exploration of the role of aperture size in the classification process. In this paper, we present galaxy classifications for all 10 010 galaxies observed within the Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey. We use Baldwin-Philips-Terlevich line fluxratio diagnostics combined with an Hα equivalent threshold in 60 apertures of varying size for the classification, and provide the corresponding catalogs. MaNGA-selected AGN primarily lie below the main sequence of star-forming galaxies, and reside in massive galaxies with stellar masses of ∼ 10 11 M ⊙ and a median Hα-derived star formation rate of ∼ 1.44M ⊙ yr −1 . We find that the number of "fake" AGN increases significantly beyond selection apertures of > 1.0 R e f f because of increased contamination from diffuse ionized gas (DIG). A comparison with previous works shows that the treatment of the underlying stellar continuum and flux measurements can significantly impact galaxy classification. Our work provides the community with AGN catalogs and galaxy classifications for the full MaNGA survey.

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The molecular gas main sequence and Schmidt–Kennicutt relation are fundamental, the star-forming main sequence is a (useful) byproduct

Baker

Maiolino

Belfiore

et al. 2022

Monthly Notices of the Royal Astronomical Society

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We investigate the relationship between the star formation rate (SFR), stellar mass (M*) and molecular gas mass ($M_{H_2}$) for local star-forming galaxies. We further investigate these relationships for high-z (z=1-3) galaxies and for the hosts of a local sample of Active Galactic Nuclei (AGN). We explore which of these dependencies are intrinsic and which are an indirect by-product by employing partial correlation coefficients and random forest regression. We find that for local star-forming galaxies, high-z galaxies, and AGN host galaxies, the Schmidt-Kennicutt relation (SK, between $M_{H_2}$ and SFR), and the Molecular Gas Main Sequence (MGMS, between $M_{H_2}$ and M*) are intrinsic primary relations, while the relationship between M* and SFR, i.e. the Star-Forming Main Sequence (SFMS), is an indirect by-product of the former two. Hence the Star-Forming Main Sequence is not a fundamental scaling relation for local or high-redshift galaxies. We find evidence for both the evolution of the MGMS and SK relation over cosmic time, where, at a given stellar mass, the higher the redshift, the greater the molecular gas mass and the star formation efficiency. We offer a parameterisation of both the MGMS and SK relation’s evolution with redshift, showing how they combine to form the observed evolution of the SFMS. In addition, we find that the local AGN host galaxies follow an AGN-MGMS relation (as well as a AGN-SK relation), where the MGMS is offset to lower $M_{H_2}$ for a given M* compared to local SF galaxies.

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MASCOT: an ESO–ARO legacy survey of molecular gas in nearby SDSS-MaNGA galaxies – I. First data release, and global and resolved relations between H2 and stellar content

Cited by 6 publications

References 75 publications

MASCOT: molecular gas depletion times and metallicity gradients – evidence for feedback in quenching active galaxies

MASCOT: molecular gas depletion times and metallicity gradients – evidence for feedback in quenching active galaxies

Classifying the full SDSS-IV MaNGA Survey using optical diagnostic diagrams: Presentation of AGN catalogs in flexible apertures

The molecular gas main sequence and Schmidt–Kennicutt relation are fundamental, the star-forming main sequence is a (useful) byproduct

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