Hydrogen Recombination Line Observations of the Galactic Center Region

M. Royster, J. W. Hewitt, D. A. Roberts, Farhad Y Zadeh

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We present the results of H90α radio recombination line observations at 3.6 cm of the Galactic center region with the Green Bank Telescope. The targeted survey includes six Hα (87 < n < 93) and nine Hβ (109 < n < 117) line transitions within the bandpass which are combined to increase sensitivity. Several prominent thermal sources in the vicinity of nonthermal radio filaments are observed, as well as diffuse ∼0 km s-1 ionized gas detected throughout the Galactic center. A few of the thermal sources studied include: G359.47-0.17, G359.57-0.07, G359.36+0.00, Sickle (G0.18-0.04), Sgr C (G359.5-0.0) and HII regions in the vicinity of nonthermal radio filaments N2 (G0.08+0.15) , and N8 (G359.79+0.17). One of the more interesting sources is G0.17+0.15 with a center velocity of +125 km s-1 and typical linewidth of 30 km s-1. This source is engulfed by one of the most prominent nonthermal filaments of the radio Arc at l = 0.2° which runs perpendicular to the Galactic plane.
Original languageEnglish (US)
Title of host publicationThe Galactic Center
Subtitle of host publicationa Window to the Nuclear Environment of Disk Galaxies
EditorsMark R Morris, Q Daniel Wang, Feng Yuan
PublisherAstronomical Society of the Pacific
Pages31-32
Number of pages2
ISBN (Electronic)978-1-58381-759-9
ISBN (Print)978-1-58381-758-2
StatePublished - 2011

Publication series

NameAstronomical Society of the Pacific Conference Series
Volume439

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