431 citations · 1.4k across the 40 of their papers we have counts for
36 papers · 1 filter
Spiral arms across stellar populations in simulations via the local dimension method
J. Ardèvol, M. Semczuk, T. Antoja +3
Context. The origin and nature of spiral arms remain unclear. Star forming regions and young stars are generally strongly associated to the spiral structure, but there are few quan…
A map of the outer gas disk of the Galaxy with direct distances from young stars
Peter Craig, Sukanya Chakrabarti, Alexander R. Pettitt +2
For more than fifty years, astronomers have mapped the neutral hydrogen gas in the Galaxy assuming kinematically derived distances. We employ the distances of nearby young stars, w…
Self-consistent modelling of the Milky Way structure using live potentials
Eva Durán-Camacho, Ana Duarte-Cabral, Alex R. Pettitt +6
To advance our understanding of the evolution of the interstellar medium (ISM) of our Galaxy, numerical models of Milky Way (MW) type galaxies are widely used. However, most models…
The impact of bar origin and morphology on stellar migration
Elizabeth J. Iles, Alex R. Pettitt, Takashi Okamoto +1
Different mechanisms driving bar structure formation indicate that bar origins should be distinguishable in the stellar populations of galaxies. To study how these origins affect d…
Star cluster formation and feedback in different environments of a Milky Way-like galaxy
Ahmad A. Ali, Clare L. Dobbs, Thomas J. R. Bending +2
It remains unclear how galactic environment affects star formation and stellar cluster properties. This is difficult to address in Milky Way-mass galaxy simulations because of limi…
Large-scale Velocity-coherent Filaments in the SEDIGISM Survey: Association with Spiral Arms and Fraction of Dense Gas
Y. Ge, K. Wang, A. Duarte-Cabral +15
Context. Filamentary structures in the interstellar medium are closely related to star formation. Dense gas mass fraction (DGMF) or clump formation efficiency in large-scale filame…
The formation of clusters and OB associations in different density spiral arm environments
C. L. Dobbs, T. J. R. Bending, A. R. Pettitt +2
We present simulations of the formation and evolution of clusters in spiral arms. The simulations follow two different spiral arm regions, and the total gas mass is varied to produ…
Massive core/star formation triggered by cloud-cloud collision: II High-speed collisions of magnetized clouds
Nirmit Sakre, Asao Habe, Alex R. Pettitt +4
We study the effects of the magnetic fields on the formation of massive, self-gravitationally bound cores (MBCs) in high-speed cloud-cloud collisions (CCCs). Extending our previous…
Multi-wavelength and Multi-CO View of The Minor Merger Driven Star Formation in the Nearby LIRG NGC 3110
Yuka Kawana, Toshiki Saito, Sachiko K. Okumura +12
We present Atacama Large Millimeter/submillimeter Array observations of multiple CO(1-0), CO(1-0), and CO(1-0) lines and 2.9 mm and 1.3 mm continuum emission toward t…
Differences in star formation activity between tidally triggered and isolated bars: a case study of NGC 4303 and NGC 3627
Elizabeth J. Iles, Alex R. Pettitt, Takashi Okamoto
Galactic bars are important drivers of galactic evolution, and yet how they impact the interstellar medium and correspondingly star formation, remains unclear. We present simulatio…
The formation of massive stellar clusters in converging galactic flows with photoionisation
C. L. Dobbs, T. J. R. Bending, A. R. Pettitt +1
We have performed simulations of cluster formation along two regions of a spiral arm taken from a global Milky Way simulation, including photoionising feedback. One region is chara…
The SEDIGISM survey: The influence of spiral arms on the molecular gas distribution of the inner Milky Way
D. Colombo, A. Duarte-Cabral, A. R. Pettitt +23
The morphology of the Milky Way is still a matter of debate. In order to shed light on uncertainties surrounding the structure of the Galaxy, in this paper, we study the imprint of…
The SEDIGISM survey: first data release and overview of the Galactic structure
F. Schuller, J. S. Urquhart, T. Csengeri +57
The SEDIGISM (Structure, Excitation and Dynamics of the Inner Galactic Interstellar Medium) survey used the APEX telescope to map 84 deg^2 of the Galactic plane between l = -60 deg…
The SEDIGISM survey: Molecular clouds in the inner Galaxy
A. Duarte-Cabral, D. Colombo, J. S. Urquhart +57
We use the 13CO(2-1) emission from the SEDIGISM high-resolution spectral-line survey of the inner Galaxy, to extract the molecular cloud population with a large dynamic range in sp…
SEDIGISM-ATLASGAL: Dense Gas Fraction and Star Formation Efficiency Across the Galactic Disk
J. S. Urquhart, C. Figura, J. R. Cross +32
By combining two surveys covering a large fraction of the molecular material in the Galactic disk we investigate the role the spiral arms play in the star formation process. We hav…
How do different spiral arm models impact the ISM and GMC population?
Alex R. Pettitt, Clare L. Dobbs, Junichi Baba +4
The nature of galactic spiral arms in disc galaxies remains elusive. Regardless of the spiral model, arms are expected to play a role in sculpting the star-forming interstellar med…
The power of co-ordinate transformations in dynamical interpretations of Galactic structure
Jason A. S. Hunt, Kathryn V. Johnston, Alex R. Pettitt +3
DR2 has provided an unprecedented wealth of information about the positions and motions of stars in our Galaxy, and has highlighted the degree of disequilibria in the disc.…
Birth Sites of Young Stellar Associations and Recent Star Formation in a Flocculent Corrugated Disk
Alice C. Quillen, Alex R. Pettitt, Sukanya Chakrabarti +3
With backwards orbit integration we estimate birth locations of young stellar associations and moving groups identified in the solar neighborhood that are younger than 70 Myr. The…
Massive core/star formation triggered by cloud-cloud collision: Effect of magnetic field
Nirmit Sakre, Asao Habe, Alex R. Pettitt +1
We study effect of magnetic field on massive dense core formation in colliding unequal molecular clouds by performing magnetohydrodynamic simulations with sub-parsec resolution (0.…
Young stars as tracers of a barred-spiral Milky Way
Alex R. Pettitt, Sarah E. Ragan, Martin C. Smith
Identifying the structure of our Galaxy has always been fraught with difficulties, and while modern surveys continue to make progress building a map of the Milky Way, there is stil…
The Anatomy of a Star-Forming Galaxy II: the role of FUV heating via dust
Samantha M. Benincasa, James W. Wadsley, Hugh M. P. Couchman +4
Far-Ultraviolet (FUV) radiation greatly exceeds ultraviolet, supernovae and winds in the energy budget of young star clusters but is poorly modeled in galaxy simulations. We presen…
Comparing the Properties of GMCs in M33 from Simulations and Observations
C. L. Dobbs, E. Rosolowsky, A. R. Pettitt +3
We compare the properties of clouds in simulated M33 galaxies to those observed in the real M33. We apply a friends of friends algorithm and CPROPS to identify clouds, as well as a…
CO Multi-line Imaging of Nearby Galaxies (COMING). VII. Fourier decomposition of molecular gas velocity fields and bar pattern speed
Dragan Salak, Yuto Noma, Kazuo Sorai +24
The CO velocity fields of a sample of 20 nearby spiral galaxies, selected from the CO Multi-line Imaging of Nearby Galaxies (COMING) legacy project of No…
Molecular gas and Star Formation Properties in Early Stage Mergers: SMA CO(2-1) Observations of the LIRGs NGC 3110 and NGC 232
D. Espada, S. Martin, S. Verley +13
Mergers of galaxies are an important mode for galaxy evolution because they serve as an efficient trigger of powerful starbursts. However, observational studies of the molecular ga…