1 / 10

Debris Disk Detection around Nearby Stars

Debris Disk Detection around Nearby Stars. Elizabeth Gehret Mentor : Dr . David Koerner Northern Arizona University. Introduction. Working with Dr. David Koerner at NAU Analyzing photometry from a sample of nearby stars Excess infrared emission indicates dust around a star.

beulah
Download Presentation

Debris Disk Detection around Nearby Stars

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Debris Disk Detection around Nearby Stars Elizabeth Gehret Mentor: Dr. David Koerner Northern Arizona University

  2. Introduction • Working with Dr. David Koerner at NAU • Analyzing photometry from a sample of nearby stars • Excess infrared emission indicates dust around a star

  3. Why do we care? • Stars with debris disks are indicators of planetary systems • Correlation between stellar properties and debris disks

  4. Data • Data taken from Spitzer Space Telescope • 24μm and 70μm • Wide-field Infrared Survey Explorer (WISE) • 3.4μm, 4.6μm, 12μm, 22μm • Ground-based optical and near-infrared (BVK) photometry • .445μm, .551μm, 2.19μm

  5. Analysis • Spitzer data taken from an NAU survey of 978 stars • WISE data and BVK photometry taken from online databases • IRSA, SIMBAD, VISIER

  6. Analysis • WISE 1 used as photosphericestimation • Subtracted off longer wavelength bands to look for excess emission

  7. Analysis • Photospheric uncertainty flipped to find σ

  8. Results • Stars 3σ or greater above photospheric emission compiled in a list of debris disk candidates • Preliminary results • 146 stars at 24μm • 193 stars at 70μm

  9. Remaining Work • Saturation of WISE data (brightest stars) • Misidentification of WISE targets • Small % of objects w/these issues--need to be fixed before results can be finalized

  10. Thank you! • Dr. Koerner • Nadine Barlow & Kathleen Stigmon • NASA’s Space Grant program • Arizona Space Grant Consortium

More Related