𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Infrared Spectroscopy of the ν3 Band of Hydrogen Cyanide in Comet C/1995 O1 Hale–Bopp

✍ Scribed by Karen Magee-Sauer; Michael J. Mumma; Michael A. DiSanti; Neil Dello Russo; Terrence W. Rettig

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
169 KB
Volume
142
Category
Article
ISSN
0019-1035

No coin nor oath required. For personal study only.

✦ Synopsis

Hydrogen cyanide (HCN) was detected in Comet Hale-Bopp at infrared wavelengths near 3.0 µm on four dates between Feb 24.0 and May 1.0 1997 using high-resolution spectroscopy. The average rotational temperature retrieved for the (001) vibrational level on UT 1997 April 29.9 was (95 ± 6) K near the nucleus, increasing to (122 ± 8) K in the intermediate coma (4 -10 off the nucleus). The HCN production rate on April 29.9 was (3.09 ± 0.13) × 10 28 molecules s -1 . When compared with the water production rate obtained from direct measurements of the H 2 O 100-010 band on common observation dates using the same instrument and data processing algorithms, the weighted average (for the four dates) of the relative abundance (HCN/H 2 O) was (0.40 ± 0.05)%. The measured spatial distribution for HCN is consistent with its release at the nucleus-no significant contribution from a distributed source is required within 10,000 km of the nucleus.

📜 SIMILAR VOLUMES

Ultraviolet Observations of Comet Hale–B
Ultraviolet Observations of Comet Hale–Bopp (C/1995 O1) by the UARS SOLSTICE
✍ Thomas N. Woods; Paul D. Feldman; Gary J. Rottman 📂 Article 📅 2000 🏛 Elsevier Science 🌐 English ⚖ 63 KB

Ultraviolet spectra of Comet Hale-Bopp (C/1995 O1) were obtained near its perihelion from the SOLar-STellar Irradiance Comparison Experiment (SOLSTICE) on the Upper Atmosphere Research Satellite (UARS). These measurements in March and April 1997 are used to derive water and carbon production rates f

Infrared Spectroscopy of H3O+: The ν1 Fu
Infrared Spectroscopy of H3O+: The ν1 Fundamental Band
✍ Jian Tang; Takeshi Oka 📂 Article 📅 1999 🏛 Elsevier Science 🌐 English ⚖ 275 KB

The infrared spectrum of H 3 O ϩ in positive column discharges of H 2 /O 2 gas mixtures has been studied by a difference frequency laser spectrometer. The 1 fundamental band of H 3 O ϩ was identified in the region of the strong 3 Ϯ 4 0 Ϯ bands. Molecular constants were obtained by the least-squares

Analysis of Coma Dust Optical Properties
Analysis of Coma Dust Optical Properties in Comet C/1995 O1 (Hale–Bopp): II. Effects of Polarization
✍ Dana Xavier Kerola; Stephen M. Larson 📂 Article 📅 2001 🏛 Elsevier Science 🌐 English ⚖ 77 KB

## Efforts to apply a single-scattering polarized radiative transfer code to interpret photopolarimetric measurements of coma dust optical properties in Comet Hale-Bopp corroborate previous photometrically derived conclusions concerning the predominance of small sized particles in Hale-Bopp's coma

SOHO/SWAN Observations of the Structure
SOHO/SWAN Observations of the Structure and Evolution of the Hydrogen Lyman-α Coma of Comet Hale–Bopp (1995 O1)
✍ M.R. Combi; A.A. Reinard; J.-L. Bertaux; E. Quemerais; T. Mäkinen 📂 Article 📅 2000 🏛 Elsevier Science 🌐 English ⚖ 262 KB

The SWAN all-sky camera on the SOHO spacecraft observed the hydrogen Lyman-alpha coma of Comet Hale-Bopp (1995 O1) from January through May 1997. The observations covered heliocentric distances from 1.75 AU before perihelion to 1.29 AU after, showing the hydrogen coma to vary in brightness, shape, a

Infrared Diode Laser Spectroscopy of the
Infrared Diode Laser Spectroscopy of the ν1Fundamental and ν1+ ν5− ν5Bands of the C3S Molecule
✍ Shuro Takano; Jian Tang; Shuji Saito 📂 Article 📅 1996 🏛 Elsevier Science 🌐 English ⚖ 157 KB

The vibration-rotation absorption spectra of the C 3 S molecule were studied using a tunable infrared diode laser spectrometer. The n 1 fundamental and n 1 / n 5 0 n 5 hot bands were measured between 2046 and 2067 cm 01 . The C 3 S molecule was produced by a glow discharge in a flowing mixture of CS