597 citations · 11.5k across the 182 of their papers we have counts for
86 papers · 1 filter
Gasflows in Barred Galaxies with Big Orbital Loops-A Comparative Study of Two Hydrocodes
Stavros Pastras, Panos A. Patsis, E. Athanassoula
We study the flow of gas in a barred-galaxy model, in which a considerable part of the underlying stable periodic orbits have loops where, close to the ends of the bar, several orb…
Uncovering Extraplanar Gas in UGCA 250 with the Ultra-deep MHONGOOSE Survey
Sushma Kurapati, D. J. Pisano, W. J. G. de Blok +28
We use the neutral atomic hydrogen (HI) observations of the edge-on galaxy UGCA 250, taken as part of the MeerKAT HI Observations of Nearby Galactic Objects - Observing Southern Em…
Connection between Non-Axisymmetric Structures and Neutral Gas Distribution in Disk Galaxies
Ze-Zhong Liang, Jing Wang, Hua Gao +2
Non-axisymmetric structures, such as bars and spiral arms, are known to concentrate molecular gas and star formation in galaxy centers, actively building up the pseudo-bulges. Howe…
MHONGOOSE -- A MeerKAT Nearby Galaxy HI Survey
W. J. G. de Blok, J. Healy, F. M. Maccagni +57
The MHONGOOSE (MeerKAT HI Observations of Nearby Galactic Objects: Observing Southern Emitters) survey maps the distribution and kinematics of the neutral atomic hydrogen (HI) gas…
Bar Properties as a Function of Wavelength: A Local Baseline with S4G for High-Redshift Studies
Karín Menéndez-Delmestre, Thiago S. Gonçalves, Kartik Sheth +10
The redshift evolution of bars is an important signpost of the dynamic maturity of disk galaxies. To characterize the intrinsic evolution safe from band-shifting effects, it is nec…
A JWST investigation into the bar fraction at redshifts 1 < z < 3
Zoe A. Le Conte, Dimitri A. Gadotti, Leonardo Ferreira +7
The presence of a stellar bar in a disc galaxy indicates that the galaxy hosts in its main part a dynamically settled disc and that bar-driven processes are taking place in shaping…
On the origin of the Galactic thin and thick discs, their abundance gradients and the diagnostic potential of their abundance ratios
Nikos Prantzos, Carlos Abia, Tianxiang Chen +8
Using a semi-analytical model of the evolution of the Milky Way, we show how secular evolution can create distinct overdensities in the phase space of various properties (e.g. age…
Spiral arms and the angular momentum gap in Milky Way Cepheids
Marcin Semczuk, Walter Dehnen, Ralph Schoenrich +1
The angular-momentum distribution of classical Cepheids in the outer Milky Way disc is bi-modal with a gap at , cor…
Age-morphology dependence of the Milky Way boxy/peanut bulge seen in Mira variables
Marcin Semczuk, Walter Dehnen, Ralph Schoenrich +1
We analyse the distribution of Mira variable stars in the central region of the Milky Way. We find that with increasing period, i.e. decreasing age, the Miras shift towards negativ…
Stellar masses, sizes, and radial profiles for 465 nearby early-type galaxies: an extension to the Spitzer Survey of Stellar Structure in Galaxies (SG)
A. E. Watkins, H. Salo, E. Laurikainen +16
The Spitzer Survey of Stellar Structure in Galaxies (SG) is a detailed study of over 2300 nearby galaxies in the near-infrared (NIR), which has been critical to our understan…
A barred Milky Way surrogate from an N-body simulation
T. Tepper-Garcia, J. Bland-Hawthorn, E. Vasiliev +10
We present an N-body model for the barred Milky Way (MW) galaxy that reproduces many of its properties, including the overall mass distribution, the disc kinematics, and the proper…
Cosmic Evolution of Barred Galaxies up to z ~ 0.84
Taehyun Kim, E. Athanassoula, Kartik Sheth +4
We explore the cosmic evolution of the bar length, strength, and light deficit around the bar for 379 barred galaxies at 0.2 < z 0.835 using F814W images from the COSMOS sur…
The small boxy/peanut structure of the Milky Way traced by old stars
Marcin Semczuk, Walter Dehnen, Ralph Schoenrich +1
We analyse the positions of RR Lyrae stars in the central region of the Milky Way. In addition to the overall bar shape detected previously, we find evidence for a peanut shaped st…
Buckling bars in nearly face-on galaxies observed with MaNGA
K. M. Xiang, D. M. Nataf, E. Athanassoula +6
Over half of disk galaxies are barred, yet the mechanisms for bar formation and the life-time of bar buckling remain poorly understood. In simulations, a thin bar undergoes a rapid…
MeerKAT HI commissioning observations of MHONGOOSE galaxy ESO 302-G014
W. J. G. de Blok, E. Athanassoula, A. Bosma +43
We present the results of three commissioning HI observations obtained with the MeerKAT radio telescope. These observations make up part of the preparation for the forthcoming MHON…
Kinematics of RR Lyrae stars in the Galactic bulge with OGLE-IV and Gaia DR2
Hangci Du, Shude Mao, E. Athanassoula +2
We analyze the kinematics and spatial distribution of 15,599 fundamental-mode RR Lyrae (RRL) stars in the Milky Way bulge by combining OGLE-IV photometric data and Gaia DR2 proper…
Suppressed or enhanced central star formation rates in late-type barred galaxies
Jing Wang, E. Athanassoula, Si-Yue Yu +4
Bars in disc-dominated galaxies are able to drive gas inflow inside the corotation radius, thus enhancing the central star formation rate (SFR). Previous work, however, has found t…
Tidally induced warps of spiral galaxies in IllustrisTNG
Marcin Semczuk, Ewa L. Lokas, Elena D'Onghia +3
Warps are common features in both stellar and gaseous disks of nearby spiral galaxies with the latter usually easier to detect. Several theories have been proposed in the literatur…
The orbital content of bars: The origin of 'non-x1-tree', bar-supporting orbits
P. A. Patsis, E. Athanassoula
Recently, many orbital studies in barred galaxy potentials have revealed the existence of orbits which are not trapped around x1 tree orbits, but could be potentially appropriate b…
The sequence of spiral arm classes: Observational signatures of persistent spiral density waves in grand-design galaxies
A. Bittner, D. A. Gadotti, B. G. Elmegreen +4
We investigate how the properties of spiral arms relate to other fundamental galaxy properties. To this end, we use previously published measurements of those properties, and our o…
Disc galaxies formed from major mergers in Illustris
Nicolas Peschken, Ewa L. Łokas, E. Athanassoula
We show how wet major mergers can create disc galaxies in a cosmological context, using the Illustris simulation. We select a sample of 38 disc galaxies having experienced a major…
SDSS-IV MaNGA: pattern speeds of barred galaxies
Rui Guo, Shude Mao, E. Athanassoula +5
The MaNGA project has obtained IFU data for several thousand nearby galaxies, including barred galaxies. With the two dimensional spectral and kinematic information provided by IFU…
Linking bar- and interaction-driven molecular gas concentration with centrally-enhanced star formation in EDGE-CALIFA galaxies
Ryan Chown, Cheng Li, E. Athanassoula +6
We study the spatially resolved star formation history and molecular gas distribution of 58 nearby galaxies, using integral field spectroscopy from the CALIFA survey and CO $J=1\ri…
Unveiling the environment and faint features of the isolated galaxy CIG 96 with deep optical and HI observations
P. Ramirez-Moreta, L. Verdes-Montenegro, J. Blasco-Herrera +21
Asymmetries in HI in galaxies are often caused by the interaction with close companions, making isolated galaxies an ideal framework to study secular evolution. The AMIGA project h…