Identification and Radial Velocity Extraction for 100+ Double-Lined Spectroscopic Binaries
Research Mentor(s)
Covey, Kevin R.
Description
Double-lined spectroscopic binary systems (SB2s) are pairs of stars that orbit near enough to each other that they are visually indistinguishable. The properties and frequency of binary systems are a strong test of stellar evolution models, and provide clues to the conditions and processes under which single and binary star systems form. We use near-infrared spectroscopy and computational methods to resolve the components of SB2s in the Perseus Molecular Cloud, Pleiades, NGC 2264, and the Orion A star forming region. We present line of sight, or radial velocity measurements for 104 SB2s, 86 of which are newly identified. SB2s are identified using cross-correlation functions (CCFs), which compare the observed spectra to a set of template spectra. Radial velocities are measured from the two peak positions in the CCFs, which correspond to the Doppler shift of each star in the system. For systems with multiple radial velocity measurements we present mass ratios and center-of-mass velocities, along with an initial estimate for cluster membership. For two systems, both with 16 measurements, we present initial orbital parameters.
Document Type
Event
Start Date
18-5-2017 12:00 PM
End Date
18-5-2017 3:00 PM
Department
Physics/Astronomy
Genre/Form
student projects; posters
Subjects – Topical (LCSH)
Stars--Formation; Double stars--Spectra; Doppler effect
Type
Image
Rights
Copying of this document in whole or in part is allowable only for scholarly purposes. It is understood, however, that any copying or publication of this documentation for commercial purposes, or for financial gain, shall not be allowed without the author's written permission.
Language
English
Format
application/pdf
Identification and Radial Velocity Extraction for 100+ Double-Lined Spectroscopic Binaries
Double-lined spectroscopic binary systems (SB2s) are pairs of stars that orbit near enough to each other that they are visually indistinguishable. The properties and frequency of binary systems are a strong test of stellar evolution models, and provide clues to the conditions and processes under which single and binary star systems form. We use near-infrared spectroscopy and computational methods to resolve the components of SB2s in the Perseus Molecular Cloud, Pleiades, NGC 2264, and the Orion A star forming region. We present line of sight, or radial velocity measurements for 104 SB2s, 86 of which are newly identified. SB2s are identified using cross-correlation functions (CCFs), which compare the observed spectra to a set of template spectra. Radial velocities are measured from the two peak positions in the CCFs, which correspond to the Doppler shift of each star in the system. For systems with multiple radial velocity measurements we present mass ratios and center-of-mass velocities, along with an initial estimate for cluster membership. For two systems, both with 16 measurements, we present initial orbital parameters.
Comments
Outstanding Poster Award Recipient