HCO+ and Radio Continuum Emission from the Star Forming Region G75.78+0.34

Dublin Core

Title

HCO+ and Radio Continuum Emission from the Star Forming Region G75.78+0.34

Description

We present 1.3 and 3.6 cm radio continuum images and a HCO+ spectrum of the massive star forming region G75.78+0.34 obtained with the Very Large Array (VLA) and with the Berkley Illinois Maryland Association (BIMA) interferometer. Three structures were detected in the continuum emission: one associated with the well-known cometary H ɪɪ region, plus two more compact structures located at 6′′ east and at 2′′ south of cometary H ɪɪ region. Using the total flux and intensity peak we estimated an electron density of ≈1.5 × 104 cm−3, an emission measure of ≈6 × 107 cm−6 pc, a mass of ionized gas of ≈3 M⊙, and a diameter of 0.05 pc for the cometary H ɪɪ region, being typical values for an ultracompact H ɪɪ region. The HCO+ emission probably originates from the molecular outflows previously observed in HCN and CO.

Creator

Rogemar A. Riffel
Everton Lüdke

Publisher

Advances in Astronomy

Date

2014

Rights

Copyright © 2014 Rogemar A. Riffel and Everton Lüdke.

Language

en

Type

Research Article

Identifier

https://doi.org/10.1155/2014/192513

Collection

Citation

Rogemar A. Riffel and Everton Lüdke, “HCO+ and Radio Continuum Emission from the Star Forming Region G75.78+0.34,” Open Access Journal Archives, accessed August 2, 2021, http://oajour.info/items/show/889.