Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/23860
Titolo: | An Unbiased 1.3 mm Emission Line Survey of the Protoplanetary Disk Orbiting LkCa 15 | Autori: | Punzi, K. M. Hily-Blant, P. Kastner, J. H. SACCO, GIUSEPPE GERMANO Forveille, T. |
Data pubblicazione: | 2015 | Rivista: | THE ASTROPHYSICAL JOURNAL | Numero: | 805 | Fascicolo: | 2 | Da pagina:: | 147 | Abstract: | The outer (>30 AU) regions of the dusty circumstellar disk orbiting the ̃2-5 Myr old, actively accreting solar analog LkCa 15 are known to be chemically rich, and the inner disk may host a young protoplanet within its central cavity. To obtain a complete census of the brightest molecular line emission emanating from the LkCa 15 disk over the 210-270 GHz (1.4-1.1 mm) range, we have conducted an unbiased radio spectroscopic survey with the Institute de Radioastronomie Millimétrique (IRAM) 30 m telescope. The survey demonstrates that in this spectral region, the most readily detectable lines are those of CO and its isotopologues <SUP>13</SUP>CO and C<SUP>18</SUP>O, as well as HCO<SUP>+</SUP>, HCN, CN, C<SUB>2</SUB>H, CS, and H<SUB>2</SUB>CO. All of these species had been previously detected in the LkCa 15 disk; however, the present survey includes the first complete coverage of the CN (2-1) and C<SUB>2</SUB>H (3-2) hyperfine complexes. Modeling of these emission complexes indicates that the CN and C<SUB>2</SUB>H either reside in the coldest regions of the disk or are subthermally excited, and that their abundances are enhanced relative to molecular clouds and young stellar object environments. These results highlight the value of unbiased single-dish line surveys in guiding future high-resolution interferometric imaging of disks. | Acknowledgments: | This work is based on observations carried out with the IRAM 30 m Telescope. IRAM is supported by INSU/CNRS (France), MPG (Germany), and IGN (Spain). This research is supported by National Science Foundation grant AST-1108950 to RIT. The authors thank Charlie Qi for helpful discussions. | URI: | http://hdl.handle.net/20.500.12386/23860 | URL: | https://iopscience.iop.org/article/10.1088/0004-637X/805/2/147 | ISSN: | 0004-637X | DOI: | 10.1088/0004-637X/805/2/147 | Bibcode ADS: | 2015ApJ...805..147P | Fulltext: | open |
È visualizzato nelle collezioni: | 1.01 Articoli in rivista |
File in questo documento:
File | Descrizione | Dimensioni | Formato | |
---|---|---|---|---|
Punzi_2015_ApJ_805_147.pdf | PDF editoriale | 889.43 kB | Adobe PDF | Visualizza/apri |
Page view(s)
47
controllato il 26-apr-2024
Download(s)
16
controllato il 26-apr-2024
Google ScholarTM
Check
Altmetric
Altmetric
Tutti i documenti in DSpace sono pubblicati ad Accesso Aperto, salvo diversa indicazione per alcuni documenti specifici.