The First Unbiased Radio Emission Line Survey Of The Protoplanetary Disk Orbiting Lkca 15

Punzi, Kristina Marie

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https://hdl.handle.net/2142/51069 Copy

Description

Title

The First Unbiased Radio Emission Line Survey Of The Protoplanetary Disk Orbiting Lkca 15

Author(s)

Punzi, Kristina Marie

Contributor(s)

• Sacco, G G
• Forveille, Thierry
• Hily-Blant, Pierre
• Kastner, Joel H

Issue Date

2014-06-19

Keyword(s)

Mini-symposium: Astronomical Molecular Spectroscopy in the Age of ALMA

Abstract

We have conducted the first comprehensive mm-wave molecular emission line survey of the circumstellar disk orbiting the nearby, pre-main sequence (T Tauri) star LkCa 15 (D = $140$ pc). The outer disk is chemically rich, with numerous previous detections of molecular emission lines revealing a significant gas mass. The disk around this young ($\sim$3-5 Myr), actively accreting solar analog likely hosts a young protoplanet (LkCa 15b) within its central cavity. Hence, LkCa 15 is an excellent target for an unbiased radio spectroscopic survey intended to produce a full census of the detectable molecular species within an evolved, protoplanetary disk. Our survey of LkCa 15 was conducted with the Institute de Radioastronomie Millim\'{e}trique (IRAM) 30 meter telescope over the 1.1-1.4 mm wavelength range. The survey includes detections of the three most abundant CO isotopologues ($^{12}$CO, $^{13}$CO, and C$^{18}$O) which facilitate estimates of the spatially integrated CO emission line optical depths, and complete coverage of the hyperfine line complexes of CN and C$_{2}$H that provide diagnostics of excitation and opacity for these species. This work demonstrates the value of comprehensive single-dish line surveys in guiding future high resolution interferometric imaging by ALMA of protoplanetary disks orbiting T Tauri stars.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

English

Permalink

http://hdl.handle.net/2142/51069

DOI

https://doi.org/10.15278/isms.2014.RF02

Copyright and License Information

Copyright 2014 by the authors. Licensed under a Creative Commons Attribution 4.0 International License. http://creativecommons.org/licenses/by/4.0/

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