Vortex Fiber Nulling for Exoplanet Observations: First Direct Detection of M Dwarf Companions around HIP 21543, HIP 94666, and HIP 50319
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2024
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| author | Echeverri, Daniel Xuan, Jerry W. Monnier, John D. Delorme, Jacques-Robert Wang, Jason J. Jovanovic, Nemanja Horstman, Katelyn Ruane, Garreth Mennesson, Bertrand Serabyn, Eugene Mawet, Dimitri Wallace, J. Kent Hillman, Sofia Baker, Ashley Bartos, Randall Calvin, Benjamin Cetre, Sylvain Doppmann, Greg Finnerty, Luke Fitzgerald, Michael P. Hsu, Chih-Chun Liberman, Joshua Lopez, Ronald Millar-Blanchaer, Maxwell Morris, Evan Pezzato, Jacklyn Ruffio, Jean-Baptiste Sappey, Ben Schofield, Tobias Skemer, Andrew J. Wang, Ji Xin, Yinzi Anugu, Narsireddy Chhabra, Sorabh Ibrahim, Noura Kraus, Stefan Schaefer, Gail H. Lanthermann, Cyprien |
| author_facet | Echeverri, Daniel Xuan, Jerry W. Monnier, John D. Delorme, Jacques-Robert Wang, Jason J. Jovanovic, Nemanja Horstman, Katelyn Ruane, Garreth Mennesson, Bertrand Serabyn, Eugene Mawet, Dimitri Wallace, J. Kent Hillman, Sofia Baker, Ashley Bartos, Randall Calvin, Benjamin Cetre, Sylvain Doppmann, Greg Finnerty, Luke Fitzgerald, Michael P. Hsu, Chih-Chun Liberman, Joshua Lopez, Ronald Millar-Blanchaer, Maxwell Morris, Evan Pezzato, Jacklyn Ruffio, Jean-Baptiste Sappey, Ben Schofield, Tobias Skemer, Andrew J. Wang, Ji Xin, Yinzi Anugu, Narsireddy Chhabra, Sorabh Ibrahim, Noura Kraus, Stefan Schaefer, Gail H. Lanthermann, Cyprien |
| contents | Vortex fiber nulling (VFN) is a technique for detecting and characterizing faint companions at small separations from their host star. A near-infrared ($\sim2.3 μ$m) VFN demonstrator mode was deployed on the Keck Planet Imager and Characterizer (KPIC) instrument at the Keck Observatory and presented earlier. In this paper, we present the first VFN companion detections. Three targets, HIP 21543 Ab, HIP 94666 Ab, and HIP 50319 B, were detected with host-companion flux ratios between 70 and 430 at and within one diffraction beamwidth ($λ/D$). We complement the spectra from KPIC VFN with flux ratio and position measurements from the CHARA Array to validate the VFN results and provide a more complete characterization of the targets. This paper reports the first direct detection of these three M dwarf companions, yielding their first spectra and flux ratios. Our observations provide measurements of bulk properties such as effective temperatures, radial velocities, and v$\sin{i}$, and verify the accuracy of the published orbits. These detections corroborate earlier predictions of the KPIC VFN performance, demonstrating that the instrument mode is ready for science observations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_17295 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Vortex Fiber Nulling for Exoplanet Observations: First Direct Detection of M Dwarf Companions around HIP 21543, HIP 94666, and HIP 50319 Echeverri, Daniel Xuan, Jerry W. Monnier, John D. Delorme, Jacques-Robert Wang, Jason J. Jovanovic, Nemanja Horstman, Katelyn Ruane, Garreth Mennesson, Bertrand Serabyn, Eugene Mawet, Dimitri Wallace, J. Kent Hillman, Sofia Baker, Ashley Bartos, Randall Calvin, Benjamin Cetre, Sylvain Doppmann, Greg Finnerty, Luke Fitzgerald, Michael P. Hsu, Chih-Chun Liberman, Joshua Lopez, Ronald Millar-Blanchaer, Maxwell Morris, Evan Pezzato, Jacklyn Ruffio, Jean-Baptiste Sappey, Ben Schofield, Tobias Skemer, Andrew J. Wang, Ji Xin, Yinzi Anugu, Narsireddy Chhabra, Sorabh Ibrahim, Noura Kraus, Stefan Schaefer, Gail H. Lanthermann, Cyprien Earth and Planetary Astrophysics Instrumentation and Methods for Astrophysics Vortex fiber nulling (VFN) is a technique for detecting and characterizing faint companions at small separations from their host star. A near-infrared ($\sim2.3 μ$m) VFN demonstrator mode was deployed on the Keck Planet Imager and Characterizer (KPIC) instrument at the Keck Observatory and presented earlier. In this paper, we present the first VFN companion detections. Three targets, HIP 21543 Ab, HIP 94666 Ab, and HIP 50319 B, were detected with host-companion flux ratios between 70 and 430 at and within one diffraction beamwidth ($λ/D$). We complement the spectra from KPIC VFN with flux ratio and position measurements from the CHARA Array to validate the VFN results and provide a more complete characterization of the targets. This paper reports the first direct detection of these three M dwarf companions, yielding their first spectra and flux ratios. Our observations provide measurements of bulk properties such as effective temperatures, radial velocities, and v$\sin{i}$, and verify the accuracy of the published orbits. These detections corroborate earlier predictions of the KPIC VFN performance, demonstrating that the instrument mode is ready for science observations. |
| title | Vortex Fiber Nulling for Exoplanet Observations: First Direct Detection of M Dwarf Companions around HIP 21543, HIP 94666, and HIP 50319 |
| topic | Earth and Planetary Astrophysics Instrumentation and Methods for Astrophysics |
| url | https://arxiv.org/abs/2403.17295 |