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Recurring Planetary Debris Transits and Circumstellar Gas around White Dwarf ZTF J0328–1219

  • Authors: Zachary P. Vanderbosch, Saul Rappaport, Joseph A. Guidry, Bruce L. Gary, Simon Blouin, Thomas G. Kaye, Alycia J. Weinberger, Carl Melis, Beth L. Klein, B. Zuckerman, Andrew Vanderburg, J. J. Hermes, Ryan J. Hegedus, Matthew. R. Burleigh, Ramotholo Sefako, Hannah L. Worters, and Tyler M. Heintz

2021 The Astrophysical Journal 917 41.

  • Provider: AAS Journals

Caption: Figure 7.

The SOAR (top) and MIKE (bottom) continuum-normalized spectra centered on the Ca infrared triplet region and vertically shifted for clarity. The best-fit white dwarf model spectrum convolved with a Gaussian kernel to the respective resolutions of SOAR and MIKE is overplotted in blue and velocity shifted to match the measured velocity of the Hα line (58.8 km s−1). Vertical black lines denote the rest wavelengths of each Ca infrared triplet component. CCD fringing is prevalent in the MIKE spectrum at these wavelengths, producing many of the broad features not observed in the SOAR spectrum, though detections of absorption at 8542 Å, and possibly at 8662 Å, are seen in both. We find no evidence for Ca triplet emission in these observations.

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