Chemical and Physical Characterization of the Isolated Protostellar Source CB68: FAUST IV

Simple item page
dc.citation.articleNumber70
dc.citation.issueNumber1
dc.citation.journalTitleThe Astrophysical Journal
dc.citation.volumeNumber934
dc.contributor.authorImai, Muneaki
dc.contributor.authorOya, Yoko
dc.contributor.authorSvoboda, Brian
dc.contributor.authorLiu, Hauyu Baobab
dc.contributor.authorLefloch, Bertrand
dc.contributor.authorViti, Serena
dc.contributor.authorZhang, Yichen
dc.contributor.authorCeccarelli, Cecilia
dc.contributor.authorCodella, Claudio
dc.contributor.authorChandler, Claire J.
dc.contributor.authorSakai, Nami
dc.contributor.authorAikawa, Yuri
dc.contributor.authorAlves, Felipe O.
dc.contributor.authorBalucani, Nadia
dc.contributor.authorBianchi, Eleonora
dc.contributor.authorBouvier, Mathilde
dc.contributor.authorBusquet, Gemma
dc.contributor.authorCaselli, Paola
dc.contributor.authorCaux, Emmanuel
dc.contributor.authorCharnley, Steven
dc.contributor.authorChoudhury, Spandan
dc.contributor.authorCuello, Nicolas
dc.contributor.authorSimone, Marta De
dc.contributor.authorDulieu, Francois
dc.contributor.authorDurán, Aurora
dc.contributor.authorEvans, Lucy
dc.contributor.authorFavre, Cécile
dc.contributor.authorFedele, Davide
dc.contributor.authorFeng, Siyi
dc.contributor.authorFontani, Francesco
dc.contributor.authorFrancis, Logan
dc.contributor.authorHama, Tetsuya
dc.contributor.authorHanawa, Tomoyuki
dc.contributor.authorHerbst, Eric
dc.contributor.authorHirano, Shingo
dc.contributor.authorHirota, Tomoya
dc.contributor.authorIsella, Andrea
dc.contributor.authorJímenez-Serra, Izaskun
dc.contributor.authorJohnstone, Doug
dc.contributor.authorKahane, Claudine
dc.contributor.authorGal, Romane Le
dc.contributor.authorLoinard, Laurent
dc.contributor.authorLópez-Sepulcre, Ana
dc.contributor.authorMaud, Luke T.
dc.contributor.authorMaureira, María José
dc.contributor.authorMenard, Francois
dc.contributor.authorMercimek, Seyma
dc.contributor.authorMiotello, Anna
dc.contributor.authorMoellenbrock, George
dc.contributor.authorMori, Shoji
dc.contributor.authorMurillo, Nadia M.
dc.contributor.authorNakatani, Riouhei
dc.contributor.authorNomura, Hideko
dc.contributor.authorOba, Yasuhiro
dc.contributor.authorO'Donoghue, Ross
dc.contributor.authorOhashi, Satoshi
dc.contributor.authorOkoda, Yuki
dc.contributor.authorOspina-Zamudio, Juan
dc.contributor.authorPineda, Jaime
dc.contributor.authorPodio, Linda
dc.contributor.authorRimola, Albert
dc.contributor.authorSakai, Takeshi
dc.contributor.authorSegura-Cox, Dominique
dc.contributor.authorShirley, Yancy
dc.contributor.authorTaquet, Vianney
dc.contributor.authorTesti, Leonardo
dc.contributor.authorVastel, Charlotte
dc.contributor.authorWatanabe, Naoki
dc.contributor.authorWatanabe, Yoshimasa
dc.contributor.authorWitzel, Arezu
dc.contributor.authorXue, Ci
dc.contributor.authorZhao, Bo
dc.contributor.authorYamamoto, Satoshi
dc.date.accessioned2022-08-09T17:09:29Z
dc.date.available2022-08-09T17:09:29Z
dc.date.issued2022
dc.description.abstractThe chemical diversity of low-mass protostellar sources has so far been recognized, and environmental effects are invoked as its origin. In this context, observations of isolated protostellar sources without the influence of nearby objects are of particular importance. Here, we report the chemical and physical structures of the low-mass Class 0 protostellar source IRAS 16544−1604 in the Bok globule CB 68, based on 1.3 mm Atacama Large Millimeter/submillimeter Array observations at a spatial resolution of ∼70 au that were conducted as part of the large program FAUST. Three interstellar saturated complex organic molecules (iCOMs), CH3OH, HCOOCH3, and CH3OCH3, are detected toward the protostar. The rotation temperature and the emitting region size for CH3OH are derived to be 131 ± 11 K and ∼10 au, respectively. The detection of iCOMs in close proximity to the protostar indicates that CB 68 harbors a hot corino. The kinematic structure of the C18O, CH3OH, and OCS lines is explained by an infalling–rotating envelope model, and the protostellar mass and the radius of the centrifugal barrier are estimated to be 0.08–0.30 M ⊙ and <30 au, respectively. The small radius of the centrifugal barrier seems to be related to the small emitting region of iCOMs. In addition, we detect emission lines of c-C3H2 and CCH associated with the protostar, revealing a warm carbon-chain chemistry on a 1000 au scale. We therefore find that the chemical structure of CB 68 is described by a hybrid chemistry. The molecular abundances are discussed in comparison with those in other hot corino sources and reported chemical models.
dc.identifier.citationImai, Muneaki, Oya, Yoko, Svoboda, Brian, et al.. "Chemical and Physical Characterization of the Isolated Protostellar Source CB68: FAUST IV." <i>The Astrophysical Journal,</i> 934, no. 1 (2022) IOP Publishing: https://doi.org/10.3847/1538-4357/ac77e7.
dc.identifier.digitalImai_2022_ApJ_934_70
dc.identifier.doihttps://doi.org/10.3847/1538-4357/ac77e7
dc.identifier.urihttps://hdl.handle.net/1911/113082
dc.language.isoeng
dc.publisherIOP Publishing
dc.rightsOriginal content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleChemical and Physical Characterization of the Isolated Protostellar Source CB68: FAUST IV
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Imai_2022_ApJ_934_70.pdf
Size:
7.77 MB
Format:
Adobe Portable Document Format
Download
Collections
Faculty Publications
Physics and Astronomy Publications