Persistent Link:
http://hdl.handle.net/10150/578974
Title:
A Map of DCO⁺ 3-2 and Deuteration Ratio in NGC 1333
Author:
Raphael, Brandon Adam
Issue Date:
2015
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
Deuterium fractionation may prove to be a valuable tracer of the gas associated with the earliest phases of star formation. Specifically, HCO⁺ is an abundant molecule in cold, dense gas clouds in the ISM. The HCO⁺ molecule is deuterated and becomes DCO⁺. NGC 1333, which lies in the Perseus Molecular Cloud, is a well-documented, active protostellar-forming region which may serve as a good platform to test the usefulness of DCO⁺ as a gas tracer. H¹³CO⁺ is known to be sensitive at similar conditions as DCO⁺, thus the ratio of DCO⁺ to H¹³CO⁺, R(D), then provides a method of mapping the Deuterium fractionation. We mapped the NGC 1333 region in the spectral line DCO⁺ 3 - 2 and compare to a previous map of H¹³CO⁺ 3 - 2 to derive R(D). We find a maximum R(D) = 0.140, with typical values of a few times 0.01 that is comparable to other studies. DCO⁺ emission is extended in this region and correlates well with dust continuum emission, but the Deuterium fractionation was not strongly dependent on peak core location. These results indicate that astrochemical surveys that use pointed observations at core peak locations may miss significant structure in the Deuterium fractionation within molecular clouds.
Type:
text; Electronic Thesis
Degree Name:
B.S.
Degree Level:
bachelors
Degree Program:
Honors College; Astronomy
Degree Grantor:
University of Arizona
Advisor:
Shirley, Yancy

Full metadata record

DC FieldValue Language
dc.language.isoen_USen
dc.titleA Map of DCO⁺ 3-2 and Deuteration Ratio in NGC 1333en_US
dc.creatorRaphael, Brandon Adamen
dc.contributor.authorRaphael, Brandon Adamen
dc.date.issued2015en
dc.publisherThe University of Arizona.en
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en
dc.description.abstractDeuterium fractionation may prove to be a valuable tracer of the gas associated with the earliest phases of star formation. Specifically, HCO⁺ is an abundant molecule in cold, dense gas clouds in the ISM. The HCO⁺ molecule is deuterated and becomes DCO⁺. NGC 1333, which lies in the Perseus Molecular Cloud, is a well-documented, active protostellar-forming region which may serve as a good platform to test the usefulness of DCO⁺ as a gas tracer. H¹³CO⁺ is known to be sensitive at similar conditions as DCO⁺, thus the ratio of DCO⁺ to H¹³CO⁺, R(D), then provides a method of mapping the Deuterium fractionation. We mapped the NGC 1333 region in the spectral line DCO⁺ 3 - 2 and compare to a previous map of H¹³CO⁺ 3 - 2 to derive R(D). We find a maximum R(D) = 0.140, with typical values of a few times 0.01 that is comparable to other studies. DCO⁺ emission is extended in this region and correlates well with dust continuum emission, but the Deuterium fractionation was not strongly dependent on peak core location. These results indicate that astrochemical surveys that use pointed observations at core peak locations may miss significant structure in the Deuterium fractionation within molecular clouds.en
dc.typetexten
dc.typeElectronic Thesisen
thesis.degree.nameB.S.en
thesis.degree.levelbachelorsen
thesis.degree.disciplineHonors Collegeen
thesis.degree.disciplineAstronomyen
thesis.degree.grantorUniversity of Arizonaen
dc.contributor.advisorShirley, Yancyen
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