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View article: The Complete <i>Spitzer</i> Survey of Stellar Structure in Galaxies (CS<sup>4</sup>G)
The Complete <i>Spitzer</i> Survey of Stellar Structure in Galaxies (CS<sup>4</sup>G) Open
Context. The Spitzer Survey of Stellar Structure in Galaxies (S 4 G), together with its Early Type Galaxy (ETG) extension, stands as the most extensive dataset of deep uniform mid-infrared (mid-IR; 3.6 and 4.5 μm) imaging for a sample of 2…
View article: The Intrinsic Flattening of Galaxy Disks
The Intrinsic Flattening of Galaxy Disks Open
Highly inclined (edge-on) disk galaxies offer the unique perspective to constrain their intrinsic flattening, c / a , where c and a are, respectively, the vertical and long radial axes of the disk measured at suitable stellar densities. Th…
View article: Assessing the accuracy of star formation rate measurements by direct star count in molecular clouds
Assessing the accuracy of star formation rate measurements by direct star count in molecular clouds Open
Star formation estimates based on the counting of young stellar objects (YSOs) are commonly carried out for nearby star-forming regions in the Galaxy, and in principle could be extended to any star-forming region where direct star counts a…
View article: Relatively young thick disks in star-forming late-type galaxies
Relatively young thick disks in star-forming late-type galaxies Open
We trace the evolution of eight edge-on star-forming disk galaxies by analyzing stellar population properties of their thin and thick disks. These galaxies have relatively low stellar masses (4~$\times$~10$^9$ to 6~$\times$~10$^{10}$~$M_{\…
View article: Gas flows in the central region of the Seyfert galaxy NGC 4593 with MUSE
Gas flows in the central region of the Seyfert galaxy NGC 4593 with MUSE Open
Understanding how gas flows into galactic centres, fuels the AGN, and is in turn expelled back through feedback processes is of great importance to appreciate the role AGN play in the growth and evolution of galaxies. We use the MUSE-AO op…
View article: Cloudy modeling suggests a diversity of ionization mechanisms for diffuse extraplanar gas
Cloudy modeling suggests a diversity of ionization mechanisms for diffuse extraplanar gas Open
The ionization of diffuse gas located far above the energetic midplane OB stars poses a challenge to the commonly accepted notion that radiation from OB stars is the primary ionization source for gas in galaxies. We investigated the source…
View article: The Intrinsic Flattening of Galaxy Disks
The Intrinsic Flattening of Galaxy Disks Open
Highly inclined (edge-on) disk galaxies offer the unique perspective to constrain their intrinsic flattening, $c/a$, where $c$ and $a$ are respectively the vertical and long radial axes of the disk measured at suitable stellar densities. T…
View article: Gas flows in the central region of the Seyfert galaxy NGC 4593 with MUSE
Gas flows in the central region of the Seyfert galaxy NGC 4593 with MUSE Open
Context. Understanding how gas flows into galactic centres, fuels the active galactic nucleus (AGN), and is in turn expelled back through feedback processes is of great importance to appreciate the role AGN play in the growth and evolution…
View article: Assessing the accuracy of the star formation rate measurements by direct star count in molecular clouds
Assessing the accuracy of the star formation rate measurements by direct star count in molecular clouds Open
Star formation estimates based on the counting of YSOs is commonly applied to nearby star-forming regions in the Galaxy. With this method, the SFRs are measured using the counts of YSOs in a particular protostellar Class, a typical protost…
View article: Constraining the top-light initial mass function in the extended ultraviolet disk of M83
Constraining the top-light initial mass function in the extended ultraviolet disk of M83 Open
The universality or non-universality of the initial mass function (IMF) has significant implications for determining star formation rates and star formation histories from photometric properties of stellar populations. We reexamine whether…
View article: The Tully–Fisher relation and the Bosma effect
The Tully–Fisher relation and the Bosma effect Open
We show that the rotation curves of 16 nearby disc galaxies in the THINGS sample and the Milky Way can be described by the Navarro–Frenk–White halo model and by the Bosma effect at approximately the same level of accuracy. The latter effec…
View article: The Tully-Fisher relation and the Bosma effect
The Tully-Fisher relation and the Bosma effect Open
We show that the rotation curves of 16 nearby disc galaxies in the THINGS sample and the Milky Way can be described by the NFW halo model and by the Bosma effect at approximately the same level of accuracy. The latter effect suggests that …
View article: The AMIGA sample of isolated galaxies
The AMIGA sample of isolated galaxies Open
Context. In the standard cosmological model of galaxy evolution, mergers and interactions play a fundamental role in shaping galaxies. Galaxies that are currently isolated are thus interesting because they allow us to distinguish between i…
View article: The AMIGA sample of isolated galaxies. XIV. Disc breaks and interactions through ultra-deep optical imaging
The AMIGA sample of isolated galaxies. XIV. Disc breaks and interactions through ultra-deep optical imaging Open
In the standard cosmological model of galaxy evolution, mergers and interactions play a fundamental role in shaping galaxies. Galaxies that are currently isolated are thus interesting, allowing us to distinguish between internal and extern…
View article: The truncation of the disk of NGC 4565: Detected up to z=4 kpc, with star formation, and affected by the warp
The truncation of the disk of NGC 4565: Detected up to z=4 kpc, with star formation, and affected by the warp Open
Context: The hierarchical model of galaxy formation suggests that galaxies are continuously growing. However, our position inside the Milky Way prevents us from studying the disk edge. Truncations are low surface brightness features locate…
View article: Mapping non-axisymmetric velocity fields of external galaxies
Mapping non-axisymmetric velocity fields of external galaxies Open
Disk galaxies are typically in a stable configuration where matter moves in almost closed circular orbits. However, non-circular motions caused by distortions, warps, lopsidedness, or satellite interactions are common and leave distinct si…
View article: The massive relic galaxy NGC 1277 is dark matter deficient. From dynamical models of integral-field stellar kinematics out to five effective radii
The massive relic galaxy NGC 1277 is dark matter deficient. From dynamical models of integral-field stellar kinematics out to five effective radii Open
According to the $Λ$CDM cosmology, present-day galaxies with stellar masses $M_\star>10^{11} {\rm M}_\odot$ should contain a sizable fraction of dark matter within their stellar body. Models indicate that in massive early-type galaxies (ET…
View article: Linking star formation thresholds and truncations in the thin and thick disks of the low-mass galaxy UGC 7321
Linking star formation thresholds and truncations in the thin and thick disks of the low-mass galaxy UGC 7321 Open
Thin and thick disks are found in most spiral galaxies, yet their formation scenarios remain uncertain. Whether thick disks form through slow or fast, internal or environmental, processes is unclear. The physical origin of outer truncation…
View article: Linking star formation thresholds and truncations in the thin and thick disks of the low-mass galaxy UGC 7321
Linking star formation thresholds and truncations in the thin and thick disks of the low-mass galaxy UGC 7321 Open
Thin and thick disks are found in most spiral galaxies, yet their formation scenarios remain uncertain. Whether thick disks form through slow or fast, internal or environmental, processes is unclear. The physical origin of outer truncation…
View article: Stellar masses, sizes, and radial profiles for 465 nearby early-type galaxies: An extension to the<i>Spitzer</i>survey of stellar structure in Galaxies (S<sup>4</sup>G)
Stellar masses, sizes, and radial profiles for 465 nearby early-type galaxies: An extension to the<i>Spitzer</i>survey of stellar structure in Galaxies (S<sup>4</sup>G) Open
Context. The Spitzer Survey of Stellar Structure in Galaxies (S 4 G) is a detailed study of over 2300 nearby galaxies in the near-infrared (NIR), which has been critical to our understanding of the detailed structures of nearby galaxies. B…
View article: Break type and interactions from ultra-deep optical imaging of isolated galaxies
Break type and interactions from ultra-deep optical imaging of isolated galaxies Open
In the standard cosmological model of galaxy evolution, mergers and interactions play a fundamental role in shaping galaxies. Galaxies that are currently isolated are thus interesting, allowing us to identify how internal or external proce…
View article: The complex multi-component outflow of the Seyfert galaxy NGC 7130 (<i>Corrigendum</i>)
The complex multi-component outflow of the Seyfert galaxy NGC 7130 (<i>Corrigendum</i>) Open
This is a corrigendum to Comerón et al. (2021).Due to a mistake in our codes, all line fluxes were multiplied by a factor of 1.25.This affects the colour scales in two figures and the physical magnitudes derived from the flux in Hβ, namely…
View article: Distribution of star formation in galactic bars as seen with H<i>α</i>and stacked GALEX UV imaging
Distribution of star formation in galactic bars as seen with H<i>α</i>and stacked GALEX UV imaging Open
Context. Stellar bars are known to gradually funnel gas to the central parts of disk galaxies. It remains a matter of debate why the distribution of ionized gas along bars and in the circumnuclear regions varies among galaxies. Aims. Our g…
View article: On the origins of up-bending breaks in disk galaxies
On the origins of up-bending breaks in disk galaxies Open
Using SPITZER 3.6$μ$m imaging, we investigate the physical and data-driven origins of up-bending (Type III) disk breaks. We apply a robust new break-finding algorithm to 175 low-inclination disk galaxies previously identified as containing…
View article: Thick discs in galaxies were most likely not accreted
Thick discs in galaxies were most likely not accreted Open
The origin of thick discs in galaxies remains shrouded in mystery. A variety of formation scenarios has been proposed. Here we aim to test one such scenario where the thick disc stars are proposed to be accreted from satellite galaxies. In…
View article: MUSE-AO view of the starburst–AGN connection: NGC 7130
MUSE-AO view of the starburst–AGN connection: NGC 7130 Open
\nWe present the discovery of a small kinematically decoupled core of $ 0 {{\\overset{\\prime\\prime}{.}}}2 $ (60 pc) in radius as well as an outflow jet in the archetypical AGN–starburst “composite” galaxy NGC 7130 from integral field dat…
View article: Nonaxisymmetric models of galaxy velocity maps
Nonaxisymmetric models of galaxy velocity maps Open
Galaxy velocity mapsoften show the typical pattern of a rotating disk, consistent with the dynamical model where emitters rotate in circular orbits around the galactic center. The simplest template used to fit these maps consists in the ro…
View article: The reports of thick discs’ deaths are greatly exaggerated
The reports of thick discs’ deaths are greatly exaggerated Open
Recent studies have made the community aware of the importance of accounting for scattered light when examining low-surface-brightness galaxy features such as thick discs. In our past studies of the thick discs of edge-on galaxies in the S…
View article: The reports of thick discs' deaths are greatly exaggerated: thick discs are NOT artefacts caused by diffuse scattered light
The reports of thick discs' deaths are greatly exaggerated: thick discs are NOT artefacts caused by diffuse scattered light Open
Recent studies have made the community aware of scattered light when examining low-surface-brightness galaxy features such as thick discs. In our past studies of the thick discs of edge-on galaxies in the Spitzer Survey of Stellar Structur…
View article: AGN Luminosity and Stellar Age: Two Missing Ingredients for AGN Unification as Seen with iPTF Supernovae
AGN Luminosity and Stellar Age: Two Missing Ingredients for AGN Unification as Seen with iPTF Supernovae Open
Active galactic nuclei (AGNs) are extremely powerful cosmic objects, driven by accretion of hot gas upon super-massive black holes. The zoo of AGN classes is divided into two major groups, with Type-1 AGNs displaying broad Balmer emission …