Rotational Temperature Modeling of the Swan Δν = 0 Band Sequence in Comet 122P/de Vico

Tyler Nelson; Anita L. Cochran; Colin Western

doi:10.1021/acs.jpca.8b07441

Rotational Temperature Modeling of the Swan Δν = 0 Band Sequence in Comet 122P/de Vico

Tyler Nelson, Anita L. Cochran, Colin Western

School of Chemistry

Research output: Contribution to journal › Article (Academic Journal) › peer-review

3 Citations (Scopus)

211 Downloads (Pure)

Abstract

We modeled observations of the C2 d3Πg–a3Πu (Swan) Δν = 0 sequence observed in spectra of comet 122P/de Vico obtained with the 2.7 m Harlan J. Smith Telescope and Tull Coude spectrograph of McDonald observatory on 10/3/1995 and 10/4/1995. The data used spanned 4986–5169 Å at R = λ/Δλ = 60 000. We used the PGOPHER molecular spectra model to generate and fit synthetic spectra with the d3Πg having one and two rotational temperatures. We found that the excited state had a two-component rotational temperature, similar to that found for comet Halley. The modeled spectrum was sufficiently high quality that local perturbations were important to include. The large perturbation, b3Σg–(ν = 10), was added to our fits, and some new estimates of its molecular constants were found.

Original language	English
Pages (from-to)	8020-8025
Number of pages	6
Journal	Journal of Physical Chemistry A
Volume	122
Issue number	40
Early online date	17 Sept 2018
DOIs	https://doi.org/10.1021/acs.jpca.8b07441
Publication status	Published - 11 Oct 2018

Bibliographical note

Published as part of The Journal of Physical Chemistry virtual special issue “William M. Jackson Festschrift”.

Access to Document

10.1021/acs.jpca.8b07441

Full-text PDF (accepted author manuscript)
This is the author accepted manuscript (AAM). The final published version (version of record) is available online via ACS at https://pubs.acs.org/doi/10.1021/acs.jpca.8b07441 . Please refer to any applicable terms of use of the publisher.
Accepted author manuscript, 586 KB

Handle.net

Persistent link

Cite this

@article{ff48ce1f5b304972924ddc26c15a4bee,

title = "Rotational Temperature Modeling of the Swan Δν = 0 Band Sequence in Comet 122P/de Vico",

abstract = "We modeled observations of the C2 d3Πg–a3Πu (Swan) Δν = 0 sequence observed in spectra of comet 122P/de Vico obtained with the 2.7 m Harlan J. Smith Telescope and Tull Coude spectrograph of McDonald observatory on 10/3/1995 and 10/4/1995. The data used spanned 4986–5169 {\AA} at R = λ/Δλ = 60 000. We used the PGOPHER molecular spectra model to generate and fit synthetic spectra with the d3Πg having one and two rotational temperatures. We found that the excited state had a two-component rotational temperature, similar to that found for comet Halley. The modeled spectrum was sufficiently high quality that local perturbations were important to include. The large perturbation, b3Σg–(ν = 10), was added to our fits, and some new estimates of its molecular constants were found.",

author = "Tyler Nelson and Cochran, {Anita L.} and Colin Western",

note = "Published as part of The Journal of Physical Chemistry virtual special issue “William M. Jackson Festschrift”.",

year = "2018",

month = oct,

day = "11",

doi = "10.1021/acs.jpca.8b07441",

language = "English",

volume = "122",

pages = "8020--8025",

journal = "Journal of Physical Chemistry A",

issn = "1089-5639",

publisher = "American Chemical Society",

number = "40",

}

TY - JOUR

T1 - Rotational Temperature Modeling of the Swan Δν = 0 Band Sequence in Comet 122P/de Vico

AU - Nelson, Tyler

AU - Cochran, Anita L.

AU - Western, Colin

N1 - Published as part of The Journal of Physical Chemistry virtual special issue “William M. Jackson Festschrift”.

PY - 2018/10/11

Y1 - 2018/10/11

N2 - We modeled observations of the C2 d3Πg–a3Πu (Swan) Δν = 0 sequence observed in spectra of comet 122P/de Vico obtained with the 2.7 m Harlan J. Smith Telescope and Tull Coude spectrograph of McDonald observatory on 10/3/1995 and 10/4/1995. The data used spanned 4986–5169 Å at R = λ/Δλ = 60 000. We used the PGOPHER molecular spectra model to generate and fit synthetic spectra with the d3Πg having one and two rotational temperatures. We found that the excited state had a two-component rotational temperature, similar to that found for comet Halley. The modeled spectrum was sufficiently high quality that local perturbations were important to include. The large perturbation, b3Σg–(ν = 10), was added to our fits, and some new estimates of its molecular constants were found.

AB - We modeled observations of the C2 d3Πg–a3Πu (Swan) Δν = 0 sequence observed in spectra of comet 122P/de Vico obtained with the 2.7 m Harlan J. Smith Telescope and Tull Coude spectrograph of McDonald observatory on 10/3/1995 and 10/4/1995. The data used spanned 4986–5169 Å at R = λ/Δλ = 60 000. We used the PGOPHER molecular spectra model to generate and fit synthetic spectra with the d3Πg having one and two rotational temperatures. We found that the excited state had a two-component rotational temperature, similar to that found for comet Halley. The modeled spectrum was sufficiently high quality that local perturbations were important to include. The large perturbation, b3Σg–(ν = 10), was added to our fits, and some new estimates of its molecular constants were found.

U2 - 10.1021/acs.jpca.8b07441

DO - 10.1021/acs.jpca.8b07441

M3 - Article (Academic Journal)

C2 - 30220209

SN - 1089-5639

VL - 122

SP - 8020

EP - 8025

JO - Journal of Physical Chemistry A

JF - Journal of Physical Chemistry A

IS - 40

ER -

Rotational Temperature Modeling of the Swan Δν = 0 Band Sequence in Comet 122P/de Vico

Abstract

Bibliographical note

Access to Document

Handle.net

Fingerprint

Cite this