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Dr Anna McLeod's Outputs (44)

Braving the Storm: Quantifying Disk-wide Ionized Outflows in the Large Magellanic Cloud with ULLYSES (2024)
Journal Article
Zheng, Y., Tchernyshyov, K., Olsen, K., Choi, Y., Bustard, C., Roman-Duval, J., Zhu, R., Di Teodoro, E. M., Werk, J., Putman, M., McLeod, A. F., Faerman, Y., Simons, R. C., & Peek, J. (2024). Braving the Storm: Quantifying Disk-wide Ionized Outflows in the Large Magellanic Cloud with ULLYSES. The Astrophysical Journal, 974(1), 22. https://doi.org/10.3847/1538-4357/ad64d2

The Large Magellanic Cloud (LMC) is home to many H ii regions, which may lead to significant outflows. We examine the LMC’s multiphase gas (T∼104-5 K) in H i, S ii, Si iv, and C iv using 110 stellar sight lines from the Hubble Space Telescope’s Ultra... Read More about Braving the Storm: Quantifying Disk-wide Ionized Outflows in the Large Magellanic Cloud with ULLYSES.

Kaleidoscope of irradiated disks: MUSE observations of proplyds in the Orion Nebula Cluster: I. Sample presentation and ionization front sizes (2024)
Journal Article
Aru, M.-L., Maucó, K., Manara, C. F., Haworth, T. J., Facchini, S., McLeod, A. F., Miotello, A., Petr-Gotzens, M. G., Robberto, M., Rosotti, G. P., Vicente, S., Winter, A., & Ansdell, M. (2024). Kaleidoscope of irradiated disks: MUSE observations of proplyds in the Orion Nebula Cluster: I. Sample presentation and ionization front sizes. Astronomy & Astrophysics, 687, Article A93. https://doi.org/10.1051/0004-6361/202349004

In the Orion Nebula Cluster (ONC), protoplanetary disks exhibit ionized gas clouds in the form of a striking teardrop shape as massive stars irradiate the disk material. We present the first spatially and spectrally resolved observations of 12 such o... Read More about Kaleidoscope of irradiated disks: MUSE observations of proplyds in the Orion Nebula Cluster: I. Sample presentation and ionization front sizes.

The population of young low-mass stars in Trumpler 14 (2024)
Journal Article
Itrich, D., Testi, L., Beccari, G., Manara, C. F., Reiter, M., Preibisch, T., …Hennebelle, P. (2024). The population of young low-mass stars in Trumpler 14. Astronomy & Astrophysics, 685, Article A100. https://doi.org/10.1051/0004-6361/202347380

Massive star-forming regions are thought to be the most common birth environments in the Galaxy and the only birth places of very massive stars. Their presence in the stellar cluster alters the conditions within the cluster, impacting at the same tim... Read More about The population of young low-mass stars in Trumpler 14.

Pre-supernova stellar feedback in nearby starburst dwarf galaxies (2024)
Journal Article
McLeod, A. F., Fattahi, A., Belfiore, F., Rowland, L. E., Cresci, G., Hunt, L., …Venturi, G. (2024). Pre-supernova stellar feedback in nearby starburst dwarf galaxies. Astronomy & Astrophysics, 685, Article A46. https://doi.org/10.1051/0004-6361/202348029

Context. Stellar feedback in dwarf galaxies remains, to date, poorly explored, yet is crucial to understanding galaxy evolution in the early Universe. In particular, pre-supernova feedback has recently been found to play a significant role in regulat... Read More about Pre-supernova stellar feedback in nearby starburst dwarf galaxies.

XUE: Molecular Inventory in the Inner Region of an Extremely Irradiated Protoplanetary Disk (2023)
Journal Article
Ramírez-Tannus, M. C., Bik, A., Cuijpers, L., Waters, R., Göppl, C., Henning, T., Kamp, I., Preibisch, T., Getman, K. V., Chaparro, G., Cuartas-Restrepo, P., de Koter, A., Feigelson, E. D., Grant, S. L., Haworth, T. J., Hernández, S., Kuhn, M. A., Perotti, G., Povich, M. S., Reiter, M., …van Terwisga, S. E. (2023). XUE: Molecular Inventory in the Inner Region of an Extremely Irradiated Protoplanetary Disk. Astrophysical Journal Letters, 958(2), Article L30. https://doi.org/10.3847/2041-8213/ad03f8

We present the first results of the eXtreme UV Environments (XUE) James Webb Space Telescope (JWST) program, which focuses on the characterization of planet-forming disks in massive star-forming regions. These regions are likely representative of the... Read More about XUE: Molecular Inventory in the Inner Region of an Extremely Irradiated Protoplanetary Disk.

A probable Keplerian disk feeding an optically revealed massive young star. (2023)
Journal Article
McLeod, A. F., Klaassen, P. D., Reiter, M., Henshaw, J., Kuiper, R., & Ginsburg, A. (2024). A probable Keplerian disk feeding an optically revealed massive young star. Nature, 625, 55-59. https://doi.org/10.1038/s41586-023-06790-2

The canonical picture of star formation involves disk-mediated accretion, with Keplerian accretion disks and associated bipolar jets primarily observed in nearby, low-mass young stellar objects (YSOs). Recently, rotating gaseous structures and Kepler... Read More about A probable Keplerian disk feeding an optically revealed massive young star..

Illuminating evaporating protostellar outflows: ERIS/SPIFFIER reveals the dissociation and ionization of HH 900 (2023)
Journal Article
Reiter, M., Haworth, T. J., Manara, C. F., Ramsay, S., Klaassen, P. D., Itrich, D., & McLeod, A. F. (2024). Illuminating evaporating protostellar outflows: ERIS/SPIFFIER reveals the dissociation and ionization of HH 900. Monthly Notices of the Royal Astronomical Society, 527(2), 3220–3230. https://doi.org/10.1093/mnras/stad3304

Protostellar jets and outflows are signposts of active star formation. In H II regions, molecular tracers like CO only reveal embedded portions of the outflow. Outside the natal cloud, outflows are dissociated, ionized, and eventually completely abla... Read More about Illuminating evaporating protostellar outflows: ERIS/SPIFFIER reveals the dissociation and ionization of HH 900.

Into the Mystic: ALMA ACA observations of the Mystic Mountains in Carina (2023)
Journal Article
Reiter, M., Klaassen, P. D., Moser-Fischer, L., McLeod, A. F., & Itrich, D. (2023). Into the Mystic: ALMA ACA observations of the Mystic Mountains in Carina. Monthly Notices of the Royal Astronomical Society, 526(1), 717–739. https://doi.org/10.1093/mnras/stad2750

We present new observations of the Mystic Mountains cloud complex in the Carina Nebula using the ALMA Atacama Compact Array (ACA) to quantify the impact of strong UV radiation on the structure and kinematics of the gas. Our Band 6 observations target... Read More about Into the Mystic: ALMA ACA observations of the Mystic Mountains in Carina.

Gas, dust, and the CO-to-molecular gas conversion factor in low-metallicity starbursts (2023)
Journal Article
Hunt, L. K., Belfiore, F., Lelli, F., Draine, B. T., Marasco, A., García-Burillo, S., …Mannucci, F. (2023). Gas, dust, and the CO-to-molecular gas conversion factor in low-metallicity starbursts. Astronomy & Astrophysics, 675, Article A64. https://doi.org/10.1051/0004-6361/202245805

The factor relating CO emission to molecular hydrogen column density, XCO, is still subject to uncertainty, in particular at low metallicity. In this paper, to quantify XCO at two different spatial resolutions, we exploited a dust-based method togeth... Read More about Gas, dust, and the CO-to-molecular gas conversion factor in low-metallicity starbursts.

Constraining the LyC escape fraction from LEGUS star clusters with SIGNALS H ii region observations: a pilot study of NGC 628 (2023)
Journal Article
Teh, J. W., Grasha, K., Krumholz, M. R., Battisti, A. J., Calzetti, D., Rousseau-Nepton, L., Rhea, C., Adamo, A., Kennicutt, R. C., Grebel, E. K., Cook, D. O., Combes, F., Messa, M., Linden, S. T., Klessen, R. S., Vilchez, J. M., Fumagalli, M., McLeod, A., Smith, L. J., Chemin, L., …Boselli, A. (2023). Constraining the LyC escape fraction from LEGUS star clusters with SIGNALS H ii region observations: a pilot study of NGC 628. Monthly Notices of the Royal Astronomical Society, 524(1), 1191-1210. https://doi.org/10.1093/mnras/stad1780

A spectacular jet from the bright 244–440 Orion proplyd: The MUSE NFM view (2023)
Journal Article
Kirwan, A., Manara, C. F., Whelan, E. T., Robberto, M., McLeod, A. F., Facchini, S., Beccari, G., Miotello, A., Schneider, P. C., Murphy, A., & Vicente, S. (2023). A spectacular jet from the bright 244–440 Orion proplyd: The MUSE NFM view. Astronomy & Astrophysics, 673, 1-15. https://doi.org/10.1051/0004-6361/202245428

In this work we present the highest spatial and spectral resolution integral field observations to date of the bipolar jet from the Orion proplyd 244–440 using Multi-Unit Spectroscopic Explorer (MUSE) narrow-field mode (NFM) observations on the Very... Read More about A spectacular jet from the bright 244–440 Orion proplyd: The MUSE NFM view.

Bringing Stellar Evolution and Feedback Together: Summary of Proposals from the Lorentz Center Workshop (2023)
Journal Article
Geen, S., Agrawal, P., Crowther, P. A., Keller, B., de Koter, A., Keszthelyi, Z., …Winch, E. (2023). Bringing Stellar Evolution and Feedback Together: Summary of Proposals from the Lorentz Center Workshop. Publications of the Astronomical Society of the Pacific, 135(1044), Article 021001. https://doi.org/10.1088/1538-3873/acb6b5

Stars strongly impact their environment, and shape structures on all scales throughout the universe, in a process known as "feedback." Due to the complexity of both stellar evolution and the physics of larger astrophysical structures, there remain ma... Read More about Bringing Stellar Evolution and Feedback Together: Summary of Proposals from the Lorentz Center Workshop.

A machine learning approach to galactic emission-line region classification (2023)
Journal Article
Rhea, C. L., Rousseau-Nepton, L., Moumen, I., Prunet, S., Hlavacek-Larrondo, J., Grasha, K., …Chemin, L. (2023). A machine learning approach to galactic emission-line region classification. RAS Techniques and Instruments, 2(1), 345-359. https://doi.org/10.1093/rasti/rzad023

Diagnostic diagrams of emission-line ratios have been used extensively to categorize extragalactic emission regions; however, these diagnostics are occasionally at odds with each other due to differing definitions. In this work, we study the applicab... Read More about A machine learning approach to galactic emission-line region classification.

A Panchromatic Study of Massive Stars in the Extremely Metal-poor Local Group Dwarf Galaxy Leo A* (2022)
Journal Article
Gull, M., Weisz, D. R., Senchyna, P., Sandford, N. R., Choi, Y., McLeod, A. F., …Williams, B. F. (2022). A Panchromatic Study of Massive Stars in the Extremely Metal-poor Local Group Dwarf Galaxy Leo A*. Astrophysical Journal, 941(2), Article 206. https://doi.org/10.3847/1538-4357/aca295

We characterize massive stars (M > 8 M⊙) in the nearby (D ∼ 0.8 Mpc) extremely metal-poor (Z ∼ 5% Z⊙) galaxy Leo A using Hubble Space Telescope ultraviolet (UV), optical, and near-infrared (NIR) imaging along with Keck/Low-Resolution Imaging Spectrog... Read More about A Panchromatic Study of Massive Stars in the Extremely Metal-poor Local Group Dwarf Galaxy Leo A*.

Stellar feedback in M 83 as observed with MUSE II. Analysis of the H II region population: Ionisation budget and pre-SN feedback (2022)
Journal Article
Della Bruna, L., Adamo, A., McLeod, A. F., Smith, L. J., Savard, G., Robert, C., …Usher, C. (2022). Stellar feedback in M 83 as observed with MUSE II. Analysis of the H II region population: Ionisation budget and pre-SN feedback. Astronomy & Astrophysics, 666, Article A29. https://doi.org/10.1051/0004-6361/202243395

Context. Energy and momentum injected by young, massive stars into the surrounding gas play an important role in regulating further star formation and in determining the galaxy’s global properties. Before supernovae begin to explode, stellar feedback... Read More about Stellar feedback in M 83 as observed with MUSE II. Analysis of the H II region population: Ionisation budget and pre-SN feedback.

Linking stellar populations to H II regions across nearby galaxies (2022)
Journal Article
Barnes, A., Chandar, R., Kreckel, K., Glover, S., Scheuermann, F., Belfiore, F., …Williams, T. (2022). Linking stellar populations to H II regions across nearby galaxies. Astronomy & Astrophysics, 662, https://doi.org/10.1051/0004-6361/202243766

Context. Stellar feedback is one of the fundamental factors regulating the evolution of galaxies. However, we still do not have access to strong observational constraints on the relative importance of the different feedback mechanisms (e.g. radiation... Read More about Linking stellar populations to H II regions across nearby galaxies.

Supernova Remnants in M83 as Observed with MUSE (2022)
Journal Article
Long, K. S., Blair, W. P., Winkler, P. F., Della Bruna, L., Adamo, A., McLeod, A. F., & Amram, P. (2022). Supernova Remnants in M83 as Observed with MUSE. Astrophysical Journal, 929(2), Article 144. https://doi.org/10.3847/1538-4357/ac5aa3

Here we describe a new study of the supernova remnants (SNRs) and SNR candidates in nearby face-on spiral galaxy M83, based primarily on MUSE integral field spectroscopy. Our revised catalog of SNR candidates in M83 has 366 objects, 81 of which are r... Read More about Supernova Remnants in M83 as Observed with MUSE.

Stellar feedback in M83 as observed with MUSE: I. Overview, an unprecedented view of the stellar and gas kinematics and evidence of outflowing gas (2022)
Journal Article
Della Bruna, L., Adamo, A., Amram, P., Rosolowsky, E., Usher, C., Sirressi, M., …Smith, L. J. (2022). Stellar feedback in M83 as observed with MUSE: I. Overview, an unprecedented view of the stellar and gas kinematics and evidence of outflowing gas. Astronomy & Astrophysics, 660, Article A77. https://doi.org/10.1051/0004-6361/202142315

Context. Young massive stars inject energy and momentum into the surrounding gas, creating a multi-phase interstellar medium (ISM) and regulating further star formation. The main challenge of studying stellar feedback proves to be the variety of scal... Read More about Stellar feedback in M83 as observed with MUSE: I. Overview, an unprecedented view of the stellar and gas kinematics and evidence of outflowing gas.

The role of thermal and non-thermal processes in the ISM of the Magellanic Clouds (2021)
Journal Article
Hassani, H., Tabatabaei, F., Hughes, A., Chastenet, J., McLeod, A., Schinnerer, E., & Nasiri, S. (2022). The role of thermal and non-thermal processes in the ISM of the Magellanic Clouds. Monthly Notices of the Royal Astronomical Society, 510(1), 11-31. https://doi.org/10.1093/mnras/stab3202

Radio continuum emission is a dust-unbiased tracer of both thermal and non-thermal processes in the interstellar medium. We present new maps of the free–free and synchrotron emission in the Magellanic Clouds (MCs) at 0.166, 1.4, and 4.8 GHz with no p... Read More about The role of thermal and non-thermal processes in the ISM of the Magellanic Clouds.

The impact of pre-supernova feedback and its dependence on environment (2021)
Journal Article
McLeod, A. F., Ali, A. A., Chevance, M., Bruna, L. D., Schruba, A., Stevance, H. F., …Zeidler, P. (2021). The impact of pre-supernova feedback and its dependence on environment. Monthly Notices of the Royal Astronomical Society, 508(4), 5425-5448. https://doi.org/10.1093/mnras/stab2726

Integral field units enable resolved studies of a large number of star-forming regions across entire nearby galaxies, providing insight on the conversion of gas into stars and the feedback from the emerging stellar populations over unprecedented dyna... Read More about The impact of pre-supernova feedback and its dependence on environment.

The Young Massive Star Cluster Westerlund 2 Observed with MUSE. III. A Cluster in Motion—The Complex Internal Dynamics (2021)
Journal Article
Zeidler, P., Sabbi, E., Nota, A., & McLeod, A. F. (2021). The Young Massive Star Cluster Westerlund 2 Observed with MUSE. III. A Cluster in Motion—The Complex Internal Dynamics. Astronomical Journal, 161(3), Article 140. https://doi.org/10.3847/1538-3881/abd6ca

Analyzing the dynamical state of nearby young massive star clusters is essential for understanding star cluster formation and evolution during their earliest stages. In this work we analyze the stellar and gas kinematics of the young massive star clu... Read More about The Young Massive Star Cluster Westerlund 2 Observed with MUSE. III. A Cluster in Motion—The Complex Internal Dynamics.

Stellar Feedback and Resolved Stellar IFU Spectroscopy in the Nearby Spiral Galaxy NGC 300 (2020)
Journal Article
McLeod, A. F., Kruijssen, J. D., Weisz, D. R., Zeidler, P., Schruba, A., Dalcanton, J. J., …Byler, N. (2020). Stellar Feedback and Resolved Stellar IFU Spectroscopy in the Nearby Spiral Galaxy NGC 300. Astrophysical Journal, 891(1), https://doi.org/10.3847/1538-4357/ab6d63

We present MUSE integral field unit (IFU) observations of five individual H ii regions in two giant star-forming complexes in the low-metallicity, nearby dwarf spiral galaxy NGC 300. In combination with high spatial resolution Hubble Space Telescope... Read More about Stellar Feedback and Resolved Stellar IFU Spectroscopy in the Nearby Spiral Galaxy NGC 300.

SIGNALS: I. Survey description (2019)
Journal Article
Rousseau-Nepton, L., Martin, R., Robert, C., Drissen, L., Amram, P., Prunet, S., …Vílchez, J. (2019). SIGNALS: I. Survey description. Monthly Notices of the Royal Astronomical Society, 489(4), https://doi.org/10.1093/mnras/stz2455

SIGNALS, the Star formation, Ionized Gas, and Nebular Abundances Legacy Survey, is a large observing programme designed to investigate massive star formation and H II regions in a sample of local extended galaxies. The programme will use the imaging... Read More about SIGNALS: I. Survey description.

Connecting the dots: a correlation between ionizing radiation and cloud mass-loss rate traced by optical integral field spectroscopy (2016)
Journal Article
McLeod, A., Gritschneder, M., Dale, J., Ginsburg, A., Klaassen, P., Mottram, J., …Testi, L. (2016). Connecting the dots: a correlation between ionizing radiation and cloud mass-loss rate traced by optical integral field spectroscopy. Monthly Notices of the Royal Astronomical Society, 462(4), https://doi.org/10.1093/mnras/stw1864

We present an analysis of the effect of feedback from O- and B-type stars with data from the integral field spectrograph Multi Unit Spectroscopic Explorer (MUSE) mounted on the Very Large Telescope of pillar-like structures in the Carina Nebular Comp... Read More about Connecting the dots: a correlation between ionizing radiation and cloud mass-loss rate traced by optical integral field spectroscopy.