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Constraints on the Properties of Warm Ionized Gas from Low-frequency Hydrogen Radio Recombination Lines

  • Authors: Pedro Salas, Kimberly L. Emig, Matteo Luisi, D. Anish Roshi, Loren D. Anderson

Pedro Salas et al 2026 The Astronomical Journal 172 .

  • Provider: AAS Journals

Caption: Figure 1.

Regions observed with the GBT. The background images are moment-0 maps from GDIGS. The white circles show the beam size of the GBT at the lowest frequency used for the 800 (solid) and 340 MHz (dashed) observations. The white circles are centered on the regions observed. The red, cyan, green, and yellow circles show known, candidate, group, and radio-quiet H II regions, respectively, from v.2.3 of the Wide-field Infrared Survey Explorer (WISE) catalog of H II regions (L. D. Anderson et al. 2014).

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