Justin R. Crepp
Resolving the Young 2 Cygni Runaway Star into a Binary Using iLocater
Crepp, Justin R.; Crass, Jonathan; Bechter, Andrew J.; Sands, Brian L.; Ketterer, Ryan; King, David; Kopon, Derek; Hamper, Randall; Engstrom, Matthew; Smous, James E.; Bechter, Eric B.; Harris, Robert; Johnson, Marshall C.; Baggett, Nicholas; Dulz, Shannon; Vansickle, Michael; Conrad, Al; Ertel, Steve; Gaudi, B. Scott; Hinz, Philip; Kuchner, Marc; Montoya, Manny; Onuma, Eleanya; Ott, Melanie; Pogge, Richard; Rahmer, Gustavo; Reynolds, Robert; Schwab, Christian; Stapelfeldt, Karl; Thomes, Joseph; Vaz, Amali; Wang, Ji; Woodward, Charles E.
Authors
Jonathan Crass
Andrew J. Bechter
Brian L. Sands
Ryan Ketterer
Dr David King david.l.king@durham.ac.uk
Senior Optical Engineer
Derek Kopon
Randall Hamper
Matthew Engstrom
James E. Smous
Eric B. Bechter
Dr Robert Harris robert.j.harris@durham.ac.uk
Assistant Professor
Marshall C. Johnson
Nicholas Baggett
Shannon Dulz
Michael Vansickle
Al Conrad
Steve Ertel
B. Scott Gaudi
Philip Hinz
Marc Kuchner
Manny Montoya
Eleanya Onuma
Melanie Ott
Richard Pogge
Gustavo Rahmer
Robert Reynolds
Christian Schwab
Karl Stapelfeldt
Joseph Thomes
Amali Vaz
Ji Wang
Charles E. Woodward
Abstract
Precision radial velocity spectrographs that use adaptive optics (AO) show promise to advance telescope observing capabilities beyond those of seeing-limited designs. We are building a spectrograph for the Large Binocular Telescope (LBT) named iLocater that uses AO to inject starlight directly into single mode fibers. iLocater's first acquisition camera system (the SX camera), which receives light from one of the 8.4 m diameter primary mirrors of the LBT, was initially installed in summer 2019 and has since been used for several commissioning runs. We present results from first-light observations that include on-sky measurements as part of commissioning activities. Imaging measurements of the bright B3IV star 2 Cygni (V = 4.98) resulted in the direct detection of a candidate companion star at an angular separation of only θ = 70 mas. Follow-up AO measurements using Keck/NIRC2 recover the candidate companion in multiple filters. An R ≈ 1500 miniature spectrograph recently installed at the LBT named Lili provides spatially resolved spectra of each binary component, indicating similar spectral types and strengthening the case for companionship. Studying the multiplicity of young runaway star systems like 2 Cygni (36.6 ± 0.5 Myr) can help to understand formation mechanisms for stars that exhibit anomalous velocities through the Galaxy. This on-sky demonstration illustrates the spatial resolution of the iLocater SX acquisition camera working in tandem with the LBT AO system; it further derisks a number of technical hurdles involved in combining AO with Doppler spectroscopy.
Citation
Crepp, J. R., Crass, J., Bechter, A. J., Sands, B. L., Ketterer, R., King, D., Kopon, D., Hamper, R., Engstrom, M., Smous, J. E., Bechter, E. B., Harris, R., Johnson, M. C., Baggett, N., Dulz, S., Vansickle, M., Conrad, A., Ertel, S., Gaudi, B. S., Hinz, P., …Woodward, C. E. (2024). Resolving the Young 2 Cygni Runaway Star into a Binary Using iLocater. Astronomical Journal, 169(1), Article 48. https://doi.org/10.3847/1538-3881/ad9b1d
Journal Article Type | Article |
---|---|
Acceptance Date | Dec 5, 2024 |
Online Publication Date | Dec 24, 2024 |
Publication Date | 2024-12 |
Deposit Date | Jun 5, 2025 |
Publicly Available Date | Jun 5, 2025 |
Journal | Astronomical Journal |
Print ISSN | 0004-6256 |
Electronic ISSN | 1538-3881 |
Publisher | IOP Publishing |
Peer Reviewed | Peer Reviewed |
Volume | 169 |
Issue | 1 |
Article Number | 48 |
DOI | https://doi.org/10.3847/1538-3881/ad9b1d |
Public URL | https://durham-repository.worktribe.com/output/4089691 |
Files
https://doi.org/
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Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/
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