J Drevon, F Millour, P Cruzalèbes, C Paladini, P Scicluna, A Matter, A Chiavassa, M Montargès, E Cannon, F Allouche, K-H Hofmann, S Lagarde, B Lopez, A Meilland, R Petrov, S Robbe-Dubois, D Schertl, G Zins, P Ábrahám, P Berio, Th Henning, J Hron, J W Isbell, W Jaffe, L Labadie, J Varga, G Weigelt, J Woillez, R van Boekel, E Pantin, W C Danchi, A de Koter, V Gámez Rosas, M R Hogerheijde, J Leftley, P Stee, R Waters
{"title":"参宿四与VLTI/MATISSE穿越大暗的图像","authors":"J Drevon, F Millour, P Cruzalèbes, C Paladini, P Scicluna, A Matter, A Chiavassa, M Montargès, E Cannon, F Allouche, K-H Hofmann, S Lagarde, B Lopez, A Meilland, R Petrov, S Robbe-Dubois, D Schertl, G Zins, P Ábrahám, P Berio, Th Henning, J Hron, J W Isbell, W Jaffe, L Labadie, J Varga, G Weigelt, J Woillez, R van Boekel, E Pantin, W C Danchi, A de Koter, V Gámez Rosas, M R Hogerheijde, J Leftley, P Stee, R Waters","doi":"10.1093/mnrasl/slad138","DOIUrl":null,"url":null,"abstract":"ABSTRACT From Nov. 2019 to May 2020, the red supergiant star Betelgeuse experienced an unprecedented drop of brightness in the visible domain called the Great Dimming event (GDE). Large atmospheric dust clouds and large photospheric convective features are suspected to be responsible for it. To better understand the dimming event, we used mid-infrared long-baseline spectro-interferometric measurements of Betelgeuse taken with the Very Large Telescope Interferometer/Multi AperTure mid-Infrared SpectroScopic Experiment (VLTI/MATISSE) instrument before (Dec. 2018), during (Feb. 2020), and after (Dec. 2020) the GDE. We present data in the 3.98–4.15 µm range to cover SiO spectral features molecules as well as adjacent continuum. We have employed geometrical models, image reconstruction, as well as radiative transfer models to monitor the spatial distribution of SiO over the stellar surface. We find a strongly inhomogeneous spatial distribution of SiO that appears to be looking very different between our observing epochs, indicative of a vigorous activity in the stellar atmosphere. The contrast of our images is small in the pseudo-continuum for all epochs, implying that our MATISSE observations support both cold spot and dust cloud model.","PeriodicalId":18951,"journal":{"name":"Monthly Notices of the Royal Astronomical Society: Letters","volume":"23 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2023-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Images of Betelgeuse with VLTI/MATISSE across the Great Dimming\",\"authors\":\"J Drevon, F Millour, P Cruzalèbes, C Paladini, P Scicluna, A Matter, A Chiavassa, M Montargès, E Cannon, F Allouche, K-H Hofmann, S Lagarde, B Lopez, A Meilland, R Petrov, S Robbe-Dubois, D Schertl, G Zins, P Ábrahám, P Berio, Th Henning, J Hron, J W Isbell, W Jaffe, L Labadie, J Varga, G Weigelt, J Woillez, R van Boekel, E Pantin, W C Danchi, A de Koter, V Gámez Rosas, M R Hogerheijde, J Leftley, P Stee, R Waters\",\"doi\":\"10.1093/mnrasl/slad138\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"ABSTRACT From Nov. 2019 to May 2020, the red supergiant star Betelgeuse experienced an unprecedented drop of brightness in the visible domain called the Great Dimming event (GDE). Large atmospheric dust clouds and large photospheric convective features are suspected to be responsible for it. To better understand the dimming event, we used mid-infrared long-baseline spectro-interferometric measurements of Betelgeuse taken with the Very Large Telescope Interferometer/Multi AperTure mid-Infrared SpectroScopic Experiment (VLTI/MATISSE) instrument before (Dec. 2018), during (Feb. 2020), and after (Dec. 2020) the GDE. We present data in the 3.98–4.15 µm range to cover SiO spectral features molecules as well as adjacent continuum. We have employed geometrical models, image reconstruction, as well as radiative transfer models to monitor the spatial distribution of SiO over the stellar surface. We find a strongly inhomogeneous spatial distribution of SiO that appears to be looking very different between our observing epochs, indicative of a vigorous activity in the stellar atmosphere. 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Images of Betelgeuse with VLTI/MATISSE across the Great Dimming
ABSTRACT From Nov. 2019 to May 2020, the red supergiant star Betelgeuse experienced an unprecedented drop of brightness in the visible domain called the Great Dimming event (GDE). Large atmospheric dust clouds and large photospheric convective features are suspected to be responsible for it. To better understand the dimming event, we used mid-infrared long-baseline spectro-interferometric measurements of Betelgeuse taken with the Very Large Telescope Interferometer/Multi AperTure mid-Infrared SpectroScopic Experiment (VLTI/MATISSE) instrument before (Dec. 2018), during (Feb. 2020), and after (Dec. 2020) the GDE. We present data in the 3.98–4.15 µm range to cover SiO spectral features molecules as well as adjacent continuum. We have employed geometrical models, image reconstruction, as well as radiative transfer models to monitor the spatial distribution of SiO over the stellar surface. We find a strongly inhomogeneous spatial distribution of SiO that appears to be looking very different between our observing epochs, indicative of a vigorous activity in the stellar atmosphere. The contrast of our images is small in the pseudo-continuum for all epochs, implying that our MATISSE observations support both cold spot and dust cloud model.
期刊介绍:
For papers that merit urgent publication, MNRAS Letters, the online section of Monthly Notices of the Royal Astronomical Society, publishes short, topical and significant research in all fields of astronomy. Letters should be self-contained and describe the results of an original study whose rapid publication might be expected to have a significant influence on the subsequent development of research in the associated subject area. The 5-page limit must be respected. Authors are required to state their reasons for seeking publication in the form of a Letter when submitting their manuscript.