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Interstellar Ultraviolet Lyα High Resolution Mapping from the New Horizons P-Alice Instrument

  • Authors: Tracy M. Becker, G. Randall Gladstone, Joel Wm. Parker, J. Michael Shull, Seth Redfield, Sarah Ruetschle, Nathaniel J. Cunningham, Cynthia S. Froning, Joshua A. Kammer, John R. Spencer, Marc Postman, Tod R. Lauer, Jayant Murthy, Maarten H. Versteeg, Jon P. Pineau, Kurt D. Retherford, Anne J. Verbiscer, Pontus C. Brandt, Kelsi N. Singer, S. Alan Stern

Tracy M. Becker et al 2026 The Astronomical Journal 171 .

  • Provider: AAS Journals

Caption: Figure 7.

The Lyα brightness and the brightness across the UV bandpass, and the ratio of the two brightnesses as a function of time since the observations started. These plots are for Row 16 in the slot and Row 21 in the box. The arrow in the full UV bandpass for Row 16 indicates two bright points (>500 R) due to a star in the row, which results in the lower Ratio of Lyα to UV bandpass at that same time (∼6 × 104 s after start). The small gap in data near 2.5 × 104 s after start reflects the time needed to reposition the FOV between the first and second scans.

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