Frantz Martinache
YOU?
Author Swipe
View article: Multi-band Spectral and Astrometric Characterization of the HIP 99770 b Planet with SCExAO/CHARIS and Gaia<sup>∗</sup>
Multi-band Spectral and Astrometric Characterization of the HIP 99770 b Planet with SCExAO/CHARIS and Gaia<sup>∗</sup> Open
We present and analyze follow-up, higher resolution ( R ∼ 70) H and K band integral field spectroscopy of the superjovian exoplanet HIP 99770 b with SCExAO/CHARIS. Our new data recover the companion at a high SNR in both bandpasses and mor…
View article: Tunable Kernel-Nulling interferometry for direct exoplanet detection
Tunable Kernel-Nulling interferometry for direct exoplanet detection Open
Nulling interferometry is a promising technique for direct detection of exoplanets. However, the performance of current devices is limited by different perturbations sources and especially by its sensitivity to any phase aberrations. The w…
View article: JWST 1.5 μm and 4.8 μm Photometry of Y Dwarfs
JWST 1.5 μm and 4.8 μm Photometry of Y Dwarfs Open
Brown dwarfs lack nuclear fusion and cool with time; the coldest known have an effective temperature below 500 K, and are known as Y dwarfs. We present a James Webb Space Telescope (JWST) photometric data set of Y dwarfs: 23 were imaged in…
View article: JWST 1.5 μm and 4.8 μm Photometry of Y Dwarfs
JWST 1.5 μm and 4.8 μm Photometry of Y Dwarfs Open
Brown dwarfs lack nuclear fusion and cool with time; the coldest known have an effective temperature below 500 K, and are known as Y dwarfs. We present a James Webb Space Telescope (JWST) photometric dataset of Y dwarfs: twenty-three were …
View article: SCExAO/CHARIS Near-infrared Scattered-light Imaging and Integral Field Spectropolarimetry of the AB Aurigae Protoplanetary System
SCExAO/CHARIS Near-infrared Scattered-light Imaging and Integral Field Spectropolarimetry of the AB Aurigae Protoplanetary System Open
We analyze near-infrared integral field spectropolarimetry of the AB Aurigae protoplanetary disk and protoplanet (AB Aur b), obtained with SCExAO/CHARIS in 22 wavelength channels covering the J , H , and K passbands ( λ 0 = 1.1–2.4 μ m) ov…
View article: SCExAO/CHARIS Near-Infrared Scattered-Light Imaging and Integral Field Spectropolarimetry of the AB Aurigae Protoplanetary System
SCExAO/CHARIS Near-Infrared Scattered-Light Imaging and Integral Field Spectropolarimetry of the AB Aurigae Protoplanetary System Open
We analyze near-infrared integral field spectropolarimetry of the AB Aurigae protoplanetary disk and protoplanet (AB Aur b), obtained with SCExAO/CHARIS in 22 wavelength channels covering the J, H, and K passbands ($λ_{\rm o}$ = 1.1--2.4 $…
View article: L-band nulling interferometry at the VLTI with Asgard/NOTT: status and plans
L-band nulling interferometry at the VLTI with Asgard/NOTT: status and plans Open
editorial reviewed
View article: Pushing high angular resolution and high contrast observations on the VLTI from Y to L band with the Asgard instrumental suite: integration status and plans
Pushing high angular resolution and high contrast observations on the VLTI from Y to L band with the Asgard instrumental suite: integration status and plans Open
editorial reviewed
View article: L-band nulling interferometry at the VLTI with Asgard/NOTT: status and plans
L-band nulling interferometry at the VLTI with Asgard/NOTT: status and plans Open
NOTT (formerly Hi-5) is the L'-band (3.5-4.0~microns) nulling interferometer of Asgard, an instrument suite in preparation for the VLTI visitor focus. The primary scientific objectives of NOTT include characterizing (i) young planetary sys…
View article: Pushing high angular resolution and high contrast observations on the VLTI from Y to L band with the Asgard instrumental suite: integration status and plans
Pushing high angular resolution and high contrast observations on the VLTI from Y to L band with the Asgard instrumental suite: integration status and plans Open
ESO's Very Large Telescope Interferometer has a history of record-breaking discoveries in astrophysics and significant advances in instrumentation. The next leap forward is its new visitor instrument, called Asgard. It comprises four nativ…
View article: Heimdallr, Baldr, and Solarstein: designing the next generation of VLTI instruments in the Asgard suite
Heimdallr, Baldr, and Solarstein: designing the next generation of VLTI instruments in the Asgard suite Open
High angular resolution imaging is an increasingly important capability in contemporary astrophysics. Of particular relevance to emerging fields such as the characterization of exoplanetary systems, imaging at the required spatial scales a…
View article: Single-aperture spectro-interferometry in the visible at the Subaru telescope with FIRST: First on-sky demonstration on Keho‘oea (<i>α</i>Lyrae) and Hokulei (<i>α</i>Aurigae)
Single-aperture spectro-interferometry in the visible at the Subaru telescope with FIRST: First on-sky demonstration on Keho‘oea (<i>α</i>Lyrae) and Hokulei (<i>α</i>Aurigae) Open
Aims. FIRST is a spectro-interferometer combining, in the visible, the techniques of aperture masking and spatial filtering thanks to single-mode fibers. By turning a monolithic telescope into an interferometer, this instrument aims to del…
View article: Single-aperture spectro-interferometry in the visible at the Subaru telescope with FIRST: First on-sky demonstration on Keho'oea (α Lyrae) and Hokulei (α Aurigae)
Single-aperture spectro-interferometry in the visible at the Subaru telescope with FIRST: First on-sky demonstration on Keho'oea (α Lyrae) and Hokulei (α Aurigae) Open
FIRST is a spectro-interferometer combining, in the visible, the techniques of aperture masking and spatial filtering thanks to single-mode fibers. This instrument aims to deliver high contrast capabilities at spatial resolutions that are …
View article: 2023 Astrophotonics Roadmap: pathways to realizing multi-functional integrated astrophotonic instruments
2023 Astrophotonics Roadmap: pathways to realizing multi-functional integrated astrophotonic instruments Open
Photonic technologies offer numerous functionalities that can be used to realize astrophotonic instruments. The most spectacular example to date is the ESO Gravity instrument at the Very Large Telescope in Chile that combines the light-gat…
View article: High-angular resolution and high contrast observations from Y to L band at the Very Large Telescope Interferometer with the Asgard Instrumental suite
High-angular resolution and high contrast observations from Y to L band at the Very Large Telescope Interferometer with the Asgard Instrumental suite Open
European Southern Observatory (ESO)'s Very Large Telescope Interferometer (VLTI), Paranal, Chile, is one of the most proficient observatories in the world for high angular resolution astronomy. It has hosted several interferometric instrum…
View article: High-contrast detection of exoplanets with a kernel-nuller at the VLTI
High-contrast detection of exoplanets with a kernel-nuller at the VLTI Open
Context. The conventional approach to direct imaging is to use a single aperture coronagraph with wavefront correction via extreme adaptive optics (AO). Such systems are limited to observing beyond an inner working angle (IWA) of a few λ /…
View article: Spectrally dispersed kernel phase interferometry with SCExAO/CHARIS: proof of concept and calibration strategies
Spectrally dispersed kernel phase interferometry with SCExAO/CHARIS: proof of concept and calibration strategies Open
Kernel phase interferometry (KPI) is a data processing technique that allows\nfor the detection of asymmetries (such as companions or disks) in high-Strehl\nimages, close to and within the classical diffraction limit. We show that KPI\ncan…
View article: High-contrast detection of exoplanets with a kernel-nuller at the VLTI
High-contrast detection of exoplanets with a kernel-nuller at the VLTI Open
Context: The conventional approach to direct imaging has been the use of a single aperture coronagraph with wavefront correction via extreme adaptive optics. Such systems are limited to observing beyond an inner working (IWA) of a few $\ma…
View article: JWST/NIRCam Discovery of the First Y+Y Brown Dwarf Binary: WISE J033605.05–014350.4
JWST/NIRCam Discovery of the First Y+Y Brown Dwarf Binary: WISE J033605.05–014350.4 Open
We report the discovery of the first brown dwarf binary system with a Y dwarf primary, WISE J033605.05−014350.4, observed with NIRCam on JWST with the F150W and F480M filters. We employed an empirical point-spread function binary model to …
View article: JWST/NIRCam discovery of the first Y+Y brown dwarf binary: WISE J033605.05$-$014350.4
JWST/NIRCam discovery of the first Y+Y brown dwarf binary: WISE J033605.05$-$014350.4 Open
We report the discovery of the first brown dwarf binary system with a Y dwarf primary, WISE J033605.05$-$014350.4, observed with NIRCam on JWST with the F150W and F480M filters. We employed an empirical point spread function binary model t…
View article: High-angular resolution and high-contrast VLTI observations from Y to L band with the Asgard instrumental suite
High-angular resolution and high-contrast VLTI observations from Y to L band with the Asgard instrumental suite Open
The Very Large Telescope Interferometer is one of the most proficient observatories in the world for high angular resolution. Since its first observations, it has hosted several interferometric instruments operating in various bandwidths i…
View article: The Near Infrared Imager and Slitless Spectrograph for JWST. V. Kernel Phase Imaging and Data Analysis
The Near Infrared Imager and Slitless Spectrograph for JWST. V. Kernel Phase Imaging and Data Analysis Open
Kernel phase imaging (KPI) enables the direct detection of substellar companions and circumstellar dust close to and below the classical (Rayleigh) diffraction limit. The high-Strehl full pupil images provided by the James Webb Space Teles…
View article: Direct Imaging and Astrometric Detection of a Gas Giant Planet Orbiting an Accelerating Star
Direct Imaging and Astrometric Detection of a Gas Giant Planet Orbiting an Accelerating Star Open
Direct imaging of gas giant exoplanets provides key information on planetary atmospheres and the architectures of planetary systems. However, few planets have been detected in blind surveys used to achieve imaging detections. Using Gaia an…
View article: The Near Infrared Imager and Slitless Spectrograph for JWST -- V. Kernel Phase Imaging and Data Analysis
The Near Infrared Imager and Slitless Spectrograph for JWST -- V. Kernel Phase Imaging and Data Analysis Open
Kernel phase imaging (KPI) enables the direct detection of substellar companions and circumstellar dust close to and below the classical (Rayleigh) diffraction limit. We present a kernel phase analysis of JWST NIRISS full pupil images take…
View article: Probing Photon Statistics in Adaptive Optics Images with SCExAO/MEC*
Probing Photon Statistics in Adaptive Optics Images with SCExAO/MEC* Open
We present an experimental study of photon statistics for high-contrast imaging with the Microwave Kinetic Inductance Detector (MKID) Exoplanet Camera (MEC) located behind the Subaru Coronagraphic Extreme Adaptive Optics System at the Suba…
View article: SCExAO and Keck Direct Imaging Discovery of a Low-mass Companion Around the Accelerating F5 Star HIP 5319*
SCExAO and Keck Direct Imaging Discovery of a Low-mass Companion Around the Accelerating F5 Star HIP 5319* Open
We present the direct imaging discovery of a low-mass companion to the nearby accelerating F star, HIP 5319, using SCExAO coupled with the CHARIS, VAMPIRES, and MEC instruments in addition to Keck/NIRC2 imaging. CHARIS JHK (1.1–2.4 μ m) sp…
View article: Probing Photon Statistics in Adaptive Optics Images with SCExAO/MEC
Probing Photon Statistics in Adaptive Optics Images with SCExAO/MEC Open
We present an experimental study of photon statistics for high-contrast imaging with the Microwave Kinetic Inductance Detector (MKID) Exoplanet Camera (MEC) located behind the Subaru Coronagraphic Extreme Adaptive Optics System (SCExAO) at…
View article: Controlling petals using fringes: discontinuous wavefront sensing through sparse aperture interferometry at Subaru/SCExAO
Controlling petals using fringes: discontinuous wavefront sensing through sparse aperture interferometry at Subaru/SCExAO Open
Low wind and petaling effects, caused by the discontinuous apertures of telescopes, are poorly corrected -- if at all -- by commonly used workhorse wavefront sensors (WFSs). Wavefront petaling breaks the coherence of the point spread funct…
View article: High spectral-resolution interferometry down to 1 micron with Asgard/BIFROST at VLTI: science drivers and project overview
High spectral-resolution interferometry down to 1 micron with Asgard/BIFROST at VLTI: science drivers and project overview Open
This is the final version. Available from SPIE via the DOI in this record
View article: High-angular and high-contrast VLTI observations from J to M band with the Asgard instrumental suite
High-angular and high-contrast VLTI observations from J to M band with the Asgard instrumental suite Open
editorial reviewed