NOAO >   Observing Info >   Approved Programs >   2018A-0288

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Program Information for 2018A-0288


PI: Darin Ragozzine, Brigham Young U., darin_ragozzine@byu.edu
Address: Dept of Physics and Astronomy, N482 ESC, Provo, UT, 84601 USA

CoI: Chadwick Trujillo, Northern Arizona U.
CoI: Benjamin Proudfoot, Brigham Young U.
CoI: Steven Maggard, Brigham Young U.

Title: Identifying Important New Family Members of the Dwarf Planet Haumea

Abstract: The dwarf planet Haumea is known to have several objects on nearby orbits that are spectrally unique, implying that they are debris from an ancient collision (Ragozzine & Brown 2007, hereafter RB07, and several references thereof). Several papers (Schaller & Brown 2008, Snodgrass et al. 2010, Carry et al. 2012, Trujillo et al. 2011) were dedicated to spectral investigation of candidate Haumea family members (HFMs) identified in RB07. Despite this work, there is still no explanation for the order-of-magnitude too-tight confinement of the Haumea family (Campo Bagatin et al. 2016, Hastings et al. 2016). We have completed a new dynamical analysis (the first since RB07) that has tripled the number of candidate HFMs (from 10 to 30) and allowed for detailed Bayesian modeling of the competiting Haumea family formation mechanisms. We can already rule out the popular graze-and-merge hypothesis of Leinhardt et al. 2010. While purely dynamical modeling can reach some conclusions, distinguishing between formation models and constraining parameters of the size-velocity-number distribution is strongly benefited by the spectral identification of certain HFMs. We propose to use NIRI to observe the brightest new candidate HFMs and/or those that are most valuable for improving our models to identify the unusual and unique near-IR spectra of HFMs.

Program Type: Standard/Solar System

Scheduled Nights:
Run 1 (2018A):  GEM-NQ/NIRI -- 2.6hrs band 3 (GN-2018A-Q-311 )


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NOAO >   Observing Info >   Approved Programs >   2018A-0288

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