The enormous outer Galaxy HII region CTB 102

Abstract

We present new radio recombination line observations of the previously unstudied HII region CTB 102. Line parameters are extracted and physical parameters describing the gas are calculated. We estimate the distance to CTB 102 to be 4.3 kpc. Through comparisons with HI and 1.42 GHz radio continuum data, we estimate the size of CTB 102 to be 100-130 pc, making it one of the largest HII regions known, comparable to the W4 complex. A stellar wind blown bubble model is presented as the best explanation for the observed morphology, size and velocities.

26 pages, 8 figures. Accepted for publication by The Astrophysical Journal

References in corpus (4)

• A Multiwavelength Optical Emission Line Survey of Warm Ionized Gas in the Galaxy
• The distance and neutral environment of the massive stellar cluster Westerlund 1
• A Plausible Galactic Spiral Pattern and its Rotation Speed
• Dynamical Evolution and Ionization Structure of an Expanding Superbubble: Application to W4

Cited by in corpus (8)

• The WISE Catalog of Galactic HII Regions
• A Thorough Investigation of Distance and Age of the Pulsar Wind Nebula 3C58
• The Arecibo HII Region Discovery Survey
• Extreme infrared variables from UKIDSS - II. an end-of-survey catalogue of eruptive YSOs and unusual stars
• A High Resolution Survey of the Galactic Plane at 408 MHz
• A New Distance to the Supernova Remnant DA 530 Based on HI Absorption of Polarized Emission
• GSH 91.5+2-114: A large HI shell in the outer part of the Galaxy
• High-Resolution Observations of the Molecular Clouds Associated with the Huge HII Region CTB 102