Article
Astronomy & Astrophysics
Cameron P. M. Bell, Maria-Rosa L. Cioni, Angus H. Wright, David L. Nidever, I-Da Chiang, Samyaday Choudhury, Martin A. T. Groenewegen, Clara M. Pennock, Yumi Choi, Richard de Grijs, Valentin D. Ivanov, Pol Massana, Ambra Nanni, Noelia E. D. Noel, Knut Olsen, Jacco Th van Loon, A. Katherina Vivas, Dennis Zaritsky
Summary: In this study, a map of the total intrinsic reddening of the LMC is presented, derived from the spectral energy distributions of background galaxies. The map shows regions of enhanced reddening that are consistent with far-IR emission and known star-forming regions. This study represents a large-scale categorization of extragalactic sources behind the LMC.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
B-Q Chen, H-L Guo, J. Gao, M. Yang, Y-L Liu, B-W Jiang
Summary: We present high-resolution dust reddening maps of the Magellanic Clouds, which are essential for reddening correction and the study of dust distribution and properties in these two galaxies.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Katja Fahrion, Guido De Marchi
Summary: We measured the extinction law in the 30 Dor star formation region in the Large Magellanic Cloud using NIRCam on board the JWST, extending previous studies to the infrared. By deriving the direction of the reddening vector from red clump stars, we presented the extinction law from 0.3 to 4.7 &mu m and found a significantly higher ratio of total to selective extinction and a change in slope from optical to infrared wavelengths. We also derived an infrared extinction map and found a close correlation between extinction and the structure of highly embedded regions in 30 Dor.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Christina Konstantopoulou, Annalisa De Cia, Jens-Kristian Krogager, Cedric Ledoux, Pasquier Noterdaeme, Johan P. U. Fynbo, Kasper E. Heintz, Darach Watson, Anja C. Andersen, Tanita Ramburuth-Hurt, Iris Jermann
Summary: This study investigates the depletion of metals into dust grains in the interstellar medium and finds that the dust can adsorb and reduce the metal spectrum. By collecting experimental data, the characteristics of dust depletion are determined. The study shows that the dust depletion of different metals in the universe is related to their condensation temperature, and anomalies are observed in the Magellanic Clouds, which may be attributed to recent star formation activities.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Simone Bianchi, Viviana Casasola, Edvige Corbelli, Frederic Galliano, Laura Magrini, Angelos Nersesian, Francesco Salvestrini, Maarten Baes, Letizia P. Cassara, Christopher J. R. Clark, Ilse De Looze, Anthony P. Jones, Suzanne C. Madden, Aleksandr Mosenkov, Nathalie Ysard
Summary: This study examines the far-infrared/submillimeter emissivity of nine nearby spiral galaxies and finds that the measured emissivity is lower than predicted when the dust is heated by a strong radiation field. These results have important implications for current dust models.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Francesco Belfiore, Adam K. Leroy, Thomas G. Williams, Ashley T. Barnes, Frank Bigiel, Mederic Boquien, Yixian Cao, Jeremy Chastenet, Enrico Congiu, Daniel A. Dale, Oleg V. Egorov, Cosima Eibensteiner, Eric Emsellem, Simon C. O. Glover, Brent Groves, Hamid Hassani, Ralf S. Klessen, Kathryn Kreckel, Lukas Neumann, Justus Neumann, Miguel Querejeta, Erik Rosolowsky, Patricia Sanchez-Blazquez, Karin Sandstrom, Eva Schinnerer, Jiayi Sun, Jessica Sutter, Elizabeth J. Watkins
Summary: Measurements of star formation activity on cloud scales are crucial to understanding molecular cloud physics and stellar feedback in galaxies. In this study, we used infrared emission and PAH-tracing bands to investigate obscured star formation in nearby galaxies. Our results show that the 21 μm emission is the best tracer of dust attenuation, while the PAH-tracing bands underestimate the correction for bright H II regions and suffer from contamination from diffuse IR background in fainter H II regions.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
C. Agliozzo, N. Phillips, A. Mehner, D. Baade, P. Scicluna, F. Kemper, D. Asmus, W-J de Wit, G. Pignata
Summary: By analyzing 31 LBVs, it was found that they may be a significant source of dust in Magellanic Clouds, with a relatively large dust mass that does not correlate with stellar parameters. LBVs are potentially the second most important source of dust in normal galaxies.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
Anton A. Smirnov, Sergey S. Savchenko, Denis M. Poliakov, Alexander A. Marchuk, Aleksandr V. Mosenkov, Vladimir B. Il'in, George A. Gontcharov, Javier Roman, Jonah Seguine
Summary: Using machine learning and neural networks, we successfully isolated galactic cirrus filaments from SDSS Stripe 82 data. Our study found that only filaments brighter than 26 mag arcsec(-2) in the SDSS r band can be identified based on their distinctive colors in the optical bands. We also discovered a significant impact of data processing on color estimation, including flat-fielding, masking of bright stars, and sky subtraction. By analyzing the color distribution of filaments with mock simulations, we concluded that most filaments fall within the ranges of 0.55 <= g - r <= 0.73 and 0.01 <= r - i <= 0.33. Our work provides a useful framework for analyzing various types of low surface brightness features in deep optical surveys and includes a catalog of dust filaments for practical purposes.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Alexander A. Marchuk, Anton A. Smirnov, Aleksandr Mosenkov, Vladimir B. Il'in, George A. Gontcharov, Sergey S. Savchenko, Javier Roman
Summary: This study measures the fractal dimension of cirrus clouds using optical data for the first time, finding that the averaged fractal dimension in optical data is significantly larger than in IR data. The discrepancy in fractal dimensions may be explained by differences in angular resolution and physical properties of the clouds, with further simulations needed for confirmation.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Hiroyuki Hirashita
Summary: This study proposes an updated dust evolution model focusing on grain size distribution, with improvements made on small carbonaceous grains and achieving a better match to the Milky Way extinction curve and dust emission spectral energy distribution.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Mia L. Williams, Kenji Bekki, Madeleine McKenzie
Summary: Recent simulations suggest that the tidal interaction between the Small Magellanic Cloud (SMC) and the Large Magellanic Cloud (LMC) about 2 Gyr ago could enhance the formation of massive star clusters (SCs) with masses exceeding 10^5 solar masses. These simulated SCs exhibit diffuse extended envelopes, internal rotation, and substructures.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Celine Peroux, Annalisa De Cia, J. Christopher Howk
Summary: We calculate the dust surface density across cosmic times to constrain simulations of dust build-up. We provide observational estimates of the dust surface density measured through depletion methods in a wide range of environments, from the Milky Way to z = 5.5 galaxies. These estimates complement extinction-based observations. Additionally, we introduce the dust surface density distribution function and find a power law relation slightly steeper than that for neutral gas and metal absorbers. This relation provides new constraints on modern dust models that can be computed through simulations.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
B. L. Tatton, J. Th van Loon, M-R L. Cioni, K. Bekki, C. P. M. Bell, S. Choudhury, R. de Grijs, M. A. T. Groenewegen, V. D. Ivanov, M. Marconi, J. M. Oliveira, V Ripepi, S. Rubele, S. Subramanian, N-C Sun
Summary: This study utilizes intermediate-age red clump stars to map the 3D structure of the Small Magellanic Cloud and interpret its interaction history with the Large Magellanic Cloud and the Milky Way. Significant deviations from a flat plane distribution of stars are observed, especially in the periphery and eastern side of the SMC, indicating strong interaction with the LMC a few billion years ago.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Takuya FURUTA, Hidehiro KANEDA, Takuma KOKUSHO, Yasushi NAKAJIMA, Yasuo FUKUI, Kisetsu TSUGE
Summary: The study derives the overall dust extinction map for the LMC using color excess at near-infrared wavelengths. By comparing 3D A(V) maps with hydrogen column densities N(H) of different velocity components, it suggests ongoing gas collision between the components at different velocities. Moreover, differences in the timing of gas collision and A(V)/N(H) ratios in the different star-forming regions indicate a variety of triggers for massive star formation.
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
(2022)
Article
Astronomy & Astrophysics
Takuya Furuta, Hidehiro Kaneda, Takuma Kokusho, Yasushi Nakajima, Yasuo Fukui, Kisetsu Tsuge
Summary: The study introduces a new method to evaluate dust extinction along the line of sight and reveals the consistency of dust geometry and gas mixing in different velocity scenarios in the LMC H (I) ridge region through constructing a three-dimensional A(V) map and comparing it with hydrogen column density N(H) maps.
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
(2021)