Deveny Observations of (Remnant) Planets

Conference presentation, 20 min. November 2023: LDT Partners' Meeting, Flagstaff, AZ, USA.

Transcript

1. J.J. Hermes + Lou Baya Ould Rouis Tyler Heintz Joseph Guidry Students in AS 709 DeVeny Observations of (Remnant) Planets
2. Students in AS 709
3. Oct. 27, 2023 Oct. 31, 2023 Khalid Mohamed Kate Roberts
4. Oct. 27, 2023 Oct. 31, 2023 Anna Nica Khalid Mohamed
5. Oct. 31, 2023
6. A huge thank you to Jose Fernandez Stephen Levine Cecilia Siqueiros Kyler Kuehn for support & flexibility on Oct. 31 Sleep Inn Flagstaff Anna Nica
7. DeVeny Observations of Planets Neptune + Triton, rotated so slit runs N to S Oct. 31, 2023 AS 709 collected a full night of DV4 data on Neptune, main-belt asteroids, exoplanet hosts, & a Type Ia supernova
8. DeVeny Observations of Remnant Planets In the BU white dwarf group much of our previous LDT time has been to test the age accuracy of white dwarf stars in wide (>100 au) WD+WD binaries (with DV2) Heintz, Hermes, El-Badry et al. 2022 Mark Garlick
9. DeVeny Observations of Remnant Planets Lately we have piloted a program to search for new dynamically active remnant planetary systems We are targeting the most infrared-variable white dwarfs to search for collisional events in remnant gas/dust disks Mark Garlick
10. DeVeny Observations of Remnant Planets A growing number of white dwarfs show strong mid-IR variability, including outbursts Many of these IR variables show orbiting debris with gas in emission This gas emission is most prominent at the Ca II triplet Melis et al. 2020 e.g., Wang et al. 2019, Swan et al. 2020 Guidry, Hermes & De, in prep. Normalized Flux
11. DeVeny Observations of Remnant Planets Our best candidates are mid-IR variables (from NEOWISE) without optical variability Using DV8 (831/8000) we are searching for emission from gas disks at the Ca II triplet Guidry, Hermes & De, in prep. Oct. 6, 2023 (This object does not show gas emission.)
12. DeVeny Observations of Remnant Planets We hope LDT/DeVeny will uncover new dynamically active remnant planetary systems around white dwarfs Using DV8 (831/8000) we are searching for emission from gas disks at the Ca II triplet (This object is a well-known gas emission system: Gänsicke et al. 2006, proving DeVeny+DV8 can detect Ca II emission.) June 20, 2023
13. Extra Slides
14. DeVeny Observations of Remnant Planets KR Aur, known cataclysmic variable Guidry, Hermes & De, in prep.
15. DeVeny Observations of Remnant Planets outbursting gas disk Guidry, Hermes & De, in prep. false positive from WISE PSF changes non-variable white dwarf false positive from WD proper motion