Show simple item record

dc.contributor.authorPhuong, Nguyen Thi
dc.contributor.authorDutrey, Anne
dc.contributor.authorChapillon, Edwige
dc.contributor.authorGuilloteau, Stéphane
dc.contributor.authorBary, Jeffrey S.
dc.contributor.authorBeck, Tracy L.
dc.contributor.authorCoutens, Audrey
dc.contributor.authorDenis-Alpizar, Otoniel
dc.contributor.authorDi Folco, Emmanueli
dc.contributor.authorDiep, Pham Ngoc
dc.contributor.authorMajumdar, Liton
dc.contributor.authorMelisse, J. P.
dc.date.accessioned2021-09-27T20:46:28Z
dc.date.available2021-09-27T20:46:28Z
dc.date.issued2021-09-01
dc.identifier10.1051/0004-6361/202141881
dc.identifier.issn00046361
dc.identifier.urihttps://hdl.handle.net/20.500.12728/9558
dc.description.abstractContext. Molecular line surveys are among the main tools to probe the structure and physical conditions in protoplanetary disks (PPDs), the birthplace of planets. The large radial and vertical temperature as well as density gradients in these PPDs lead to a complex chemical composition, making chemistry an important step to understand the variety of planetary systems. Aims. We aimed to study the chemical content of the protoplanetary disk surrounding GG Tau A, a well-known triple T Tauri system. Methods. We used NOEMA with the new correlator PolyFix to observe rotational lines at ∼2.6 to 4 mm from a few dozen molecules. We analysed the data with a radiative transfer code to derive molecular densities and the abundance relative to 13CO, which we compare to those of the TMC1 cloud and LkCa 15 disk. Results. We report the first detection of CCS in PPDs. We also marginally detect OCS and find 16 other molecules in the GG Tauri outer disk. Ten of them had been found previously, while seven others (13CN, N2H+, HNC, DNC, HC3N, CCS, and C34S) are new detections in this disk. Conclusions. The analysis confirms that sulphur chemistry is not yet properly understood. The D/H ratio, derived from DCO+/HCO+, DCN/HCN, and DNC/HNC ratios, points towards a low temperature chemistry. The detection of the rare species CCS confirms that GG Tau is a good laboratory to study the protoplanetary disk chemistry, thanks to its large disk size and mass.es_ES
dc.language.isoenes_ES
dc.publisherEDP Scienceses_ES
dc.subjectAstrochemistryes_ES
dc.subjectMolecular dataes_ES
dc.subjectProtoplanetary diskses_ES
dc.subjectStars: individual: GG Tau Aes_ES
dc.titleAn unbiased NOEMA 2.6 to 4 mm survey of the GG Tau ring: First detection of CCS in a protoplanetary diskes_ES
dc.typeArticlees_ES


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record