Very Deep inside the SN 1987A Core Ejecta: Molecular Structures Seen in 3D

Abellán, F. J.; Indebetouw, R.; Marcaide, J. M.; Gabler, M.; Fransson, C.; Spyromilio, J.; Burrows, D. N.; Chevalier, R.; Cigan, P.; Gaensler, B. M.; Gomez, H. L.; Janka, H.-Th.; Kirshner, R.; Larsson, J.; Lundqvist, P.; Matsuura, M.; McCray, R.; Ng, C.-Y.; Park, S.; Roche, P.; Staveley-Smith, L.; Loon, J. Th. van; Wheeler, J. C.; Woosley, S. E.

doi:10.3847/2041-8213/aa784c

The VLT-FLAMES Tarantula Survey. XXIX. Massive star formation in the local 30 Doradus starburst (2018)
Journal Article
Van Loon. (2018). The VLT-FLAMES Tarantula Survey. XXIX. Massive star formation in the local 30 Doradus starburst. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/201833433

The 30 Doradus (30 Dor) nebula in the Large Magellanic Cloud (LMC) is the brightest HII region in the Local Group and a prototype starburst similar to those found in high redshift galaxies. It is thus a stepping stone to understand the complex format... Read More about The VLT-FLAMES Tarantula Survey. XXIX. Massive star formation in the local 30 Doradus starburst.

The 30 Year Search for the Compact Object in SN 1987A (2018)
Journal Article
Alp, D., Larsson, J., Fransson, C., Indebetouw, R., Jerkstrand, A., Ahola, A., …Staveley-Smith, L. (2018). The 30 Year Search for the Compact Object in SN 1987A. Astrophysical Journal, 174 -174. https://doi.org/10.3847/1538-4357/aad739

Despite more than 30 years of searching, the compact object in Supernova (SN) 1987A has not yet been detected. We present new limits on the compact object in SN 1987A using millimeter, near-infrared, optical, ultraviolet, and X-ray observations from... Read More about The 30 Year Search for the Compact Object in SN 1987A.

ALMA Observations of Supernova Remnant N49 in the LMC. I. Discovery of CO Clumps Associated with X-Ray and Radio Continuum Shells (2018)
Journal Article
Van Loon. (2018). ALMA Observations of Supernova Remnant N49 in the LMC. I. Discovery of CO Clumps Associated with X-Ray and Radio Continuum Shells. Astrophysical Journal, https://doi.org/10.3847/1538-4357/aacfff

N49 (LHA 120-N49) is a bright X-ray supernova remnant (SNR) in the Large Magellanic Cloud. We present new 12CO (J = 1–0, 3–2), H i, and 1.4 GHz radio continuum observations of the SNR N49 using Mopra, ASTE, ALMA, and ATCA. We have newly identified th... Read More about ALMA Observations of Supernova Remnant N49 in the LMC. I. Discovery of CO Clumps Associated with X-Ray and Radio Continuum Shells.

Response to Comment on “An excess of massive stars in the local 30 Doradus starburst” (2018)
Journal Article
Schneider, F. R. N., Sana, H., Evans, C. J., Bestenlehner, J. M., Castro, N., Fossati, L., …Norman, C. (2018). Response to Comment on “An excess of massive stars in the local 30 Doradus starburst”. Science, 361(6400), https://doi.org/10.1126/science.aat7032

Farr and Mandel reanalyze our data, finding initial mass function slopes for high-mass stars in 30 Doradus that agree with our results. However, their reanalysis appears to underpredict the observed number of massive stars. Their technique results in... Read More about Response to Comment on “An excess of massive stars in the local 30 Doradus starburst”.

The VMC survey – XXXI. The spatially resolved star formation history of the main body of the Small Magellanic Cloud (2018)
Journal Article
Rubele, S., Pastorelli, G., Girardi, L., Cioni, M. L., Zaggia, S., Marigo, P., …Van Loon, J. T. (2018). The VMC survey – XXXI. The spatially resolved star formation history of the main body of the Small Magellanic Cloud. Monthly Notices of the Royal Astronomical Society, 478(4), 5017-5036. https://doi.org/10.1093/mnras/sty1279

We recover the spatially resolved star formation history across the entire main body and Wing of the Small Magellanic Cloud (SMC), using 14 deep tile images from the VISTA survey of the Magellanic Clouds (VMC) in the YJKs filters. The analysis is per... Read More about The VMC survey – XXXI. The spatially resolved star formation history of the main body of the Small Magellanic Cloud.

XXX. Stellar proper motions in the central parts of the Small Magellanic Cloud (2018)
Journal Article
Niederhofer, F., Cioni, M., Rubele, S., Schmidt, T., Bekki, K., de Grijs, R., …Zaggia, S. (2018). XXX. Stellar proper motions in the central parts of the Small Magellanic Cloud. Astronomy and Astrophysics, 613, Article L8. https://doi.org/10.1051/0004-6361/201833144

We present the first spatially resolved map of stellar proper motions within the central (similar to 3.1 x 2.4 kpc) regions of the Small Magellanic Cloud (SMC). The data used for this study encompasses four tiles from the ongoing near-infrared VISTA... Read More about XXX. Stellar proper motions in the central parts of the Small Magellanic Cloud.

The VMC survey XXVIII. Improved measurements of the proper motion of the Galactic globular cluster 47 Tucanae (2018)
Journal Article
Van Loon, J., & Oliveira, J. (2018). The VMC survey XXVIII. Improved measurements of the proper motion of the Galactic globular cluster 47 Tucanae. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/201732144

We use deep multi-epoch point-spread function (PSF) photometry taken with the Visible and Infrared Survey Telescope for Astronomy (VISTA) to measure and analyze the proper motions of stars within the Galactic globular cluster 47 Tucanae (47 Tuc, NGC... Read More about The VMC survey XXVIII. Improved measurements of the proper motion of the Galactic globular cluster 47 Tucanae.

The VMC Survey. XXIX. Turbulence-controlled Hierarchical Star Formation in the Small Magellanic Cloud (2018)
Journal Article
Van Loon, J., & Oliveira, J. (2018). The VMC Survey. XXIX. Turbulence-controlled Hierarchical Star Formation in the Small Magellanic Cloud. Astrophysical Journal, https://doi.org/10.3847/1538-4357/aabc50

In this paper we report a clustering analysis of upper main-sequence stars in the Small Magellanic Cloud, using data from the VMC survey (the VISTA near-infrared YJK s survey of the Magellanic system). Young stellar structures are identified as surfa... Read More about The VMC Survey. XXIX. Turbulence-controlled Hierarchical Star Formation in the Small Magellanic Cloud.

The Detection of Hot Cores and Complex Organic Molecules in the Large Magellanic Cloud (2018)
Journal Article
Sewiło, M., Indebetouw, R., Charnley, S. B., Zahorecz, S., Oliveira, J. M., Van Loon, J. T., …Schilke, P. (2018). The Detection of Hot Cores and Complex Organic Molecules in the Large Magellanic Cloud. Astrophysical Journal Letters, 853(2), L19 -?. https://doi.org/10.3847/2041-8213/aaa079

We report the first extragalactic detection of the complex organic molecules (COMs) dimethyl ether (CH3OCH3) and methyl formate (CH3OCHO) with the Atacama Large Millimeter/submillimeter Array (ALMA). These COMs, together with their parent species met... Read More about The Detection of Hot Cores and Complex Organic Molecules in the Large Magellanic Cloud.

First Results from the Herschel and ALMA Spectroscopic Surveys of the SMC: The Relationship between [C ii ]-bright Gas and CO-bright Gas at Low Metallicity (2018)
Journal Article
Van Loon. (2018). First Results from the Herschel and ALMA Spectroscopic Surveys of the SMC: The Relationship between [C ii ]-bright Gas and CO-bright Gas at Low Metallicity. Astrophysical Journal, 111 - ?. https://doi.org/10.3847/1538-4357/aaa4bb

The Small Magellanic Cloud (SMC) provides the only laboratory to study the structure of molecular gas at high resolution and low metallicity. We present results from the Herschel Spectroscopic Survey of the SMC (HS3), which mapped the key far-IR cool... Read More about First Results from the Herschel and ALMA Spectroscopic Surveys of the SMC: The Relationship between [C ii ]-bright Gas and CO-bright Gas at Low Metallicity.

An excess of massive stars in the local 30 Doradus starburst (2018)
Journal Article
Schneider, F. R. N., Sana, H., Evans, C. J., Bestenlehner, J. M., Castro, N., Fossati, L., …Norman, C. (2018). An excess of massive stars in the local 30 Doradus starburst. Science, 359(6371), 69-71. https://doi.org/10.1126/science.aan0106

The 30 Doradus star-forming region in the Large Magellanic Cloud is a nearby analog of large star-formation events in the distant universe. We determined the recent formation history and the initial mass function (IMF) of massive stars in 30 Doradus... Read More about An excess of massive stars in the local 30 Doradus starburst.

The VMC survey - XXVI. Structure of the Small Magellanic Cloud from RR Lyrae stars (2018)
Journal Article
Van Loon. (2018). The VMC survey - XXVI. Structure of the Small Magellanic Cloud from RR Lyrae stars. Monthly Notices of the Royal Astronomical Society, 3131-3146. https://doi.org/10.1093/mnras/stx2514

We present results from the analysis of 2997 fundamental mode RR Lyrae variables located in the Small Magellanic Cloud (SMC). For these objects, near-infrared time series photometry from the VISTA survey of the Magellanic Clouds system (VMC) and visu... Read More about The VMC survey - XXVI. Structure of the Small Magellanic Cloud from RR Lyrae stars.

A dearth of OH/IR stars in the Small Magellanic Cloud (2018)
Journal Article
Goldman, S. R., Van Loon, J. T., Gómez, J. F., Green, J. A., Zijlstra, A. A., Nanni, A., …Oliveira, J. M. (2018). A dearth of OH/IR stars in the Small Magellanic Cloud. Monthly Notices of the Royal Astronomical Society, 473(3), 3835-3853. https://doi.org/10.1093/mnras/stx2601

We present the results of targeted observations and a survey of 1612-, 1665-, and 1667-MHz circumstellar OH maser emission from asymptotic giant branch (AGB) stars and red supergiants (RSGs) in the Small Magellanic Cloud (SMC), using the Parkes and A... Read More about A dearth of OH/IR stars in the Small Magellanic Cloud.

An Infrared Census of DUST in Nearby Galaxies with Spitzer (DUSTiNGS). IV. Discovery of High-redshift AGB Analogs (2017)
Journal Article
Van Loon. (2017). An Infrared Census of DUST in Nearby Galaxies with Spitzer (DUSTiNGS). IV. Discovery of High-redshift AGB Analogs. Astrophysical Journal, https://doi.org/10.3847/1538-4357/aa9892

The survey for DUST in Nearby Galaxies with Spitzer (DUSTiNGS) identified several candidate Asymptotic Giant Branch (AGB) stars in nearby dwarf galaxies and showed that dust can form even in very metal-poor systems (${\boldsymbol{Z}}\sim 0.008\,{Z}_{... Read More about An Infrared Census of DUST in Nearby Galaxies with Spitzer (DUSTiNGS). IV. Discovery of High-redshift AGB Analogs.

The VMC Survey. XXVII. Young Stellar Structures in the LMC’s Bar Star-forming Complex (2017)
Journal Article
Van Loon, J., & Oliveira, J. (2017). The VMC Survey. XXVII. Young Stellar Structures in the LMC’s Bar Star-forming Complex. Astrophysical Journal, 149 -149. https://doi.org/10.3847/1538-4357/aa911e

Star formation is a hierarchical process, forming young stellar structures of star clusters, associations, and complexes over a wide range of scales. The star-forming complex in the bar region of the Large Magellanic Cloud is investigated with upper... Read More about The VMC Survey. XXVII. Young Stellar Structures in the LMC’s Bar Star-forming Complex.

The ESO Diffuse Interstellar Bands Large Exploration Survey (EDIBLES) - I. Project description, survey sample, and quality assessment (2017)
Journal Article
Van Loon. (2017). The ESO Diffuse Interstellar Bands Large Exploration Survey (EDIBLES) - I. Project description, survey sample, and quality assessment. Astronomy & Astrophysics, A76 -A76. https://doi.org/10.1051/0004-6361/201730912

The carriers of the diffuse interstellar bands (DIBs) are largely unidentified molecules ubiquitously present in the interstellar medium (ISM). After decades of study, two strong and possibly three weak near-infrared DIBs have recently been attribute... Read More about The ESO Diffuse Interstellar Bands Large Exploration Survey (EDIBLES) - I. Project description, survey sample, and quality assessment.

The VMC survey – XXV. The 3D structure of the Small Magellanic Cloud from Classical Cepheids (2017)
Journal Article
Ripepi, V., Cioni, M. L., Ida Moretti, M., Marconi, M., Bekki, K., Clementini, G., …Van Loon, J. T. (2017). The VMC survey – XXV. The 3D structure of the Small Magellanic Cloud from Classical Cepheids. Monthly Notices of the Royal Astronomical Society, 472(1), 808 -827. https://doi.org/10.1093/mnras/stx2096

The VISTA near-infrared YJKs survey of the Magellanic System (VMC) is collecting deep Ks-band time-series photometry of pulsating stars hosted by the two Magellanic Clouds and their connecting bridge. Here, we present Y, J, Ks light curves for a samp... Read More about The VMC survey – XXV. The 3D structure of the Small Magellanic Cloud from Classical Cepheids.

ALMA spectral survey of Supernova 1987A-molecular inventory, chemistry, dynamics and explosive nucleosynthesis (2017)
Journal Article
Van Loon. (2017). ALMA spectral survey of Supernova 1987A-molecular inventory, chemistry, dynamics and explosive nucleosynthesis. Monthly Notices of the Royal Astronomical Society, 3347 -3362. https://doi.org/10.1093/mnras/stx830

We report the first molecular line survey of Supernova 1987A in the millimetre wavelength range. In the Atacama Large Millimeter/submillimeter Array (ALMA) 210–300 and 340–360 GHz spectra, we detected cold (20–170 K) CO, 28SiO, HCO+ and SO, with weak... Read More about ALMA spectral survey of Supernova 1987A-molecular inventory, chemistry, dynamics and explosive nucleosynthesis.

Star formation histories in NGC 147 and NGC 185 (2017)
Journal Article
Van Loon. (2017). Star formation histories in NGC 147 and NGC 185. Journal of Physics: Conference Series, https://doi.org/10.1088/1742-6596/869/1/012087

NGC 147 and NGC 185 are two of the most massive satellites of the Andromeda galaxy (M 31). With similar mass and morphological type dE, they possess different amounts of interstellar gas and tidal distortion. The question therefore is, how do their h... Read More about Star formation histories in NGC 147 and NGC 185.

Very Deep inside the SN 1987A Core Ejecta: Molecular Structures Seen in 3D (2017)
Journal Article
Abellán, F. J., Indebetouw, R., Marcaide, J. M., Gabler, M., Fransson, C., Spyromilio, J., …Woosley, S. E. (in press). Very Deep inside the SN 1987A Core Ejecta: Molecular Structures Seen in 3D. Astrophysical Journal Letters, 842(2), L24. https://doi.org/10.3847/2041-8213/aa784c

Most massive stars end their lives in core-collapse supernova explosions and enrich the interstellar medium with explosively nucleosynthesized elements. Following core collapse, the explosion is subject to instabilities as the shock propagates outwar... Read More about Very Deep inside the SN 1987A Core Ejecta: Molecular Structures Seen in 3D.

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