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dc.contributor.authorTazaki, Fumie
dc.contributor.authorCui, Yuzhu
dc.contributor.authorHada, Kazuhiro
dc.contributor.authorKino, Motoki
dc.contributor.authorCho, Ilje
dc.contributor.authorZhao, Guang-Yao
dc.contributor.authorAkiyama, Kazunori
dc.contributor.authorMizuno, Yosuke
dc.contributor.authorRo, Hyunwook
dc.contributor.authorHonma, Mareki
dc.contributor.authorLu, Ru-Sen
dc.contributor.authorShen, Zhi-Qiang
dc.contributor.authorCui, Lang
dc.contributor.authorYonekura, Yoshinori
dc.date.accessioned2023-03-10T18:20:38Z
dc.date.available2023-03-10T18:20:38Z
dc.date.issued2023-02-28
dc.identifier.urihttps://hdl.handle.net/1721.1/148469
dc.description.abstractObtaining high-resolution images at centimeter-or-longer wavelengths is vital for understanding the physics of jets. We reconstructed images from the M87 22 GHz data observed with the East Asian VLBI Network (EAVN) by using the regularized maximum likelihood (RML) method, which is different from the conventional imaging method CLEAN. Consequently, a bright core and jet extending about 30 mas to the northwest were detected with a higher resolution than in the CLEAN image. The width of the jet was 0.5 mas at 0.3 mas from the core, consistent with the width measured in the 86 GHz image in the previous study. In addition, three ridges were able to be detected at around 8 mas from the core, even though the peak-to-peak separation was only 1.0 mas. This indicates that the RML image’s spatial resolution is at least 30% higher than that of the CLEAN image. This study is an important step for future multi-frequency and high-cadence observations of the EAVN to discuss the more detailed structure of the jet and its time variability.en_US
dc.publisherMultidisciplinary Digital Publishing Instituteen_US
dc.relation.isversionofhttp://dx.doi.org/10.3390/galaxies11020039en_US
dc.rightsCreative Commons Attributionen_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.sourceMultidisciplinary Digital Publishing Instituteen_US
dc.titleSuper-Resolved Image of M87 Observed with East Asian VLBI Networken_US
dc.typeArticleen_US
dc.identifier.citationGalaxies 11 (2): 39 (2023)en_US
dc.contributor.departmentHaystack Observatory
dc.identifier.mitlicensePUBLISHER_CC
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dc.date.updated2023-03-10T14:01:52Z
dspace.date.submission2023-03-10T14:01:52Z
mit.licensePUBLISHER_CC
mit.metadata.statusAuthority Work and Publication Information Neededen_US


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