Michael Engesser
A5031636281- Gamma-ray bursts and supernovae
- Astronomy and Astrophysical Research
- Astrophysics and Cosmic Phenomena
- Stellar, planetary, and galactic studies
- Pulsars and Gravitational Waves Research
- Adaptive optics and wavefront sensing
- Astrophysical Phenomena and Observations
- Spectroscopy and Laser Applications
- Galaxies: Formation, Evolution, Phenomena
- Astrophysics and Star Formation Studies
- Calibration and Measurement Techniques
- CCD and CMOS Imaging Sensors
- Solar and Space Plasma Dynamics
- Spectroscopy Techniques in Biomedical and Chemical Research
- Superconducting and THz Device Technology
- Atmospheric and Environmental Gas Dynamics
- High-pressure geophysics and materials
- Advanced Optical Sensing Technologies
- Particle Accelerators and Free-Electron Lasers
- Spacecraft Design and Technology
Space Telescope Science Institute
2023-2024
Michigan Science Center
2023
Abstract The Mid-Infrared Instrument (MIRI) extends the reach of James Webb Space Telescope (JWST) to 28.5 μ m. It provides subarcsecond-resolution imaging, high sensitivity coronagraphy, and spectroscopy at resolutions λ /Δ ∼ 100–3500, with high-resolution mode employing an integral field unit provide spatial data cubes. resulting broad suite capabilities will enable huge advances in studies over this wavelength range. This overview describes history acquiring capability for JWST. discusses...
The Medium-Resolution Spectrometer (MRS) provides one of the four operating modes Mid-Infrared Instrument (MIRI) on board James Webb Space Telescope (JWST). MRS is an integral field spectrometer, measuring spatial and spectral distributions light across 5-28 $\mu m$ wavelength range with a resolving power between 3700-1300. We present MRS's optical, spectral, spectro-photometric performance, as achieved in flight, we report effects that limit instrument's ultimate sensitivity. flight...
We analyze pre-explosion near- and mid-infrared (IR) imaging of the site SN 2023ixf in nearby spiral galaxy M101 characterize candidate progenitor star. The star displays compelling evidence variability with a possible period $\approx$1000 days an amplitude $\Delta m \approx 0.6$ mag extensive monitoring Spitzer Space Telescope since 2004, likely indicative radial pulsations. Variability consistent this is also seen near-IR $J$ $K_{s}$ bands between 2010 2023, up to just 10 before explosion....
Abstract A Type Ia supernova (SN) at z = 1.78 was discovered in James Webb Space Telescope Near Infrared Camera imaging of the galaxy cluster PLCK G165.7+67.0 (G165; 0.35). The SN is situated 1.5–2 kpc from host-galaxy nucleus and appears three different locations as a result gravitational lensing by G165. These data can yield value for Hubble’s constant using time delays this multiply imaged that we call “SN H0pe.” Over cluster, identified 21 image multiplicities, confirmed five them...
Abstract The JWST Advanced Deep Extragalactic Survey (JADES) is a multicycle program that has taken among the deepest near- and mid-infrared images to date (down ∼30 AB mag) over ∼25 arcmin 2 in GOODS-S field two sets of observations with 1 yr separation. This presented first opportunity systematically search for transients, mostly supernovae (SNe), out z > 2. We found 79 SNe: 38 at < 2, 23 3, 8 3 4, 7 4 5, undetermined redshifts, where redshifts are predominantly based on...
Abstract A bright ( m F150W,AB = 24 mag), z 1.95 supernova (SN) candidate was discovered in JWST/NIRCam imaging acquired on 2023 November 17. The SN is quintuply imaged as a result of strong gravitational lensing by foreground galaxy cluster, detected three locations, and remarkably the second lensed found same host galaxy. previous called “Requiem,” therefore new named “Encore.” This makes MACS J0138.0−2155 cluster first known system to produce more than one multiply SN. Moreover, both...
Abstract Supernova (SN) SN H0pe is a gravitationally lensed, triply imaged, Type Ia (SN Ia) discovered in James Webb Space Telescope imaging of the PLCK G165.7+67.0 cluster galaxies. Well-observed multiply imaged SNe provide rare opportunity to constrain Hubble constant ( H 0 ), by measuring relative time delay between images and modeling foreground mass distribution. located at z = 1.783 first with sufficient light-curve sampling long enough delays for an inference. Here we present...
The detectors in the Mid-Infrared Instrument (MIRI) of James Webb Space Telescope (JWST) are arsenic-21 doped silicon impurity band conduction (Si:As IBC) devices and direct descendants Spitzer IRAC22 long wavelength arrays (channels 3 4). With appropriate data processing, they can provide excellent per-23 formance. In this paper we discuss various non-ideal behaviors these that need to be addressed24 realize their potential. We have developed a set algorithms toward goal, building on...
Supernova (SN) explosions have been sought for decades as a possible source of dust in the Universe, providing seeds galaxies, stars, and planetary systems. SN 1987A offers one most promising examples significant formation, but until James Webb Space Telescope (JWST), instruments traditionally lacked sensitivity at both late times (>1 yr post-explosion) longer wavelengths (i.e., >10 um) to detect analogous reservoirs. Here we present JWST/MIRI observations two historic Type IIP SNe, 2004et...
Abstract SN H0pe is a triply imaged supernova (SN) at redshift z = 1.78 discovered using the James Webb Space Telescope. In order to classify spectroscopically and measure relative time delays of its three images (designated A, B, C), we acquired NIRSpec follow-up spectroscopy spanning 0.6–5 μ m. From high signal-to-noise spectra two bright B C, first SN, whose most closely match those 1994D 2013dy, as Type Ia SN. We identify prominent blueshifted absorption features corresponding Si ii λ...
Abstract We present the James Webb Space Telescope (JWST) discovery of SN 2023adsy, a transient object located in host galaxy JADES-GS+53.13485−27.82088 with spectroscopic redshift 2.903 ± 0.007. The was identified deep (JWST)/NIRCam imaging from JWST Advanced Deep Extragalactic Survey (JADES) program. Photometric and follow-up NIRCam NIRSpec, respectively, confirm yield UV-NIR light-curve, NIR color, information all consistent Type Ia classification. Despite its classification as likely Ia,...
Abstract We present James Webb Space Telescope (JWST) NIRCam and NIRSpec observations of a Type Ic supernova (SN Ic) its host galaxy (JADES-GS+53.13533-27.81457) at z = 2.83. This SN (named 2023adta) was identified in deep JWST/NIRCam imaging from the JWST Advanced Deep Extragalactic Survey (JADES) program. Follow-up with JWST/NIRSpec provided spectroscopic redshift 2.83 classification as an Ic-BL. The light curve 2023adta matches well other stripped-envelope SNe, we find high peak...
In this work we estimate the explosion and progenitor properties of six Type II supernovae (SNe) at 0.675 <= z 3.61 discovered by JWST Advanced Deep Extragalactic Survey (JADES) transient survey modeling their light curves. This high-redshift SN sample allows us to compare low-redshift SNe counterparts. Two are found have high energies 3e51 erg, while other four estimated typical in local Universe [(0.5-2)e51 erg]. The fraction with might be higher redshifts because of, e.g., lower...
Abstract The James Webb Space Telescope (JWST) is opening new frontiers of transient discovery and follow-up at high redshift. Here we present the a spectroscopically confirmed Type Ia supernova (SN Ia; SN 2023aeax) z = 2.15 with JWST, including NIRCam multiband light curve. 2023aeax lands edge traditional low- cosmology cuts because its blue color (peak rest-frame B − V ∼ −0.3) but normal decline rate (Δ m 15 ( ) 1.25), applying fiducial standardization BayeSN model find luminosity distance...
Core-collapse supernovae (CCSNe) have long been considered to contribute significantly the cosmic dust budget. Newly-formed in SN ejecta cools quickly and is therefore detectable at mid-infrared (mid-IR) wavelengths. However, before era of James Webb Space Telescope (JWST), direct observational evidence for condensation was found only a handful nearby CCSNe, masses (∼ 10^ generally limited $< 5$ yr $> 500$ K temperatures) two three orders magnitude smaller than theoretical predictions...
SN H0pe is a triply imaged supernova (SN) at redshift $z=1.78$ discovered using the James Webb Space Telescope (JWST). In order to classify spectroscopically and measure relative time delays of its three images (designated A, B, C), we acquired NIRSpec follow-up spectroscopy spanning 0.6 5 microns. From high signal-to-noise spectra two bright B C, first SN, whose most closely match those 1994D 2013dy, as Type Ia SN. We identify prominent blueshifted absorption features corresponding Si II...
A bright ($m_{\rm F150W,AB}$=24 mag), $z=1.95$ supernova (SN) candidate was discovered in JWST/NIRCam imaging acquired on 2023 November 17. The SN is quintuply-imaged as a result of strong gravitational lensing by foreground galaxy cluster, detected three locations, and remarkably the second lensed found same host galaxy. previous called "Requiem", therefore new named "Encore". This makes MACS J0138.0$-$2155 cluster first known system to produce more than one multiply-imaged SN. Moreover,...
The Medium-Resolution Spectrometer (MRS) provides one of the four operating modes Mid-Infrared Instrument (MIRI) on board James Webb Space Telescope (JWST). MRS is an integral field spectrometer, measuring spatial and spectral distributions light across 5-28 $μm$ wavelength range with a resolving power between 3700-1300. We present MRS's optical, spectral, spectro-photometric performance, as achieved in flight, we report effects that limit instrument's ultimate sensitivity. flight...
A Type Ia supernova (SN) at $z=1.78$ was discovered in James Webb Space Telescope Near Infrared Camera imaging of the galaxy cluster PLCK G165.7+67.0 (G165; $z = 0.35$). The SN is situated 1.5-2 kpc from host-galaxy nucleus and appears three different locations as a result gravitational lensing by G165. These data can yield value for Hubble's constant using time delays this multiply-imaged that we call "SN H0pe." Over cluster, identified 21 image multiplicities, confirmed five them...
ABSTRACT We present mid-infrared (mid-IR) imaging of the Type IIL supernova (SN) 1980K with JWST more than 40 yr post-explosion. SN 1980K, located in nearby (D ≈ 7 Mpc) ‘SN factory’ galaxy NGC 6946, was serendipitously captured JWST/MIRI images taken field 2004et same galaxy. serves as a promising candidate for studying transitional phase between young SNe and older remnants also provides great opportunity to investigate its close environment. can be identified clear bright point source all...
We analyze pre-explosion near- and mid-infrared (IR) imaging of the site SN 2023ixf in nearby spiral galaxy M101 characterize candidate progenitor star. The star displays compelling evidence variability with a possible period $\approx$1000 days an amplitude $Δm \approx 0.6$ mag extensive monitoring Spitzer Space Telescope since 2004, likely indicative radial pulsations. Variability consistent this is also seen near-IR $J$ $K_{s}$ bands between 2010 2023, up to just 10 before explosion....
Supernova (SN) H0pe is a gravitationally lensed, triply-imaged, Type Ia SN (SN Ia) discovered in James Webb Space Telescope imaging of the PLCK G165.7+67.0 cluster galaxies. Well-observed multiply-imaged SNe provide rare opportunity to constrain Hubble constant ($H_0$), by measuring relative time delay between images and modeling foreground mass distribution. located at $z=1.783$, first with sufficient light curve sampling long enough delays for an $H_0$ inference. Here we present...
We present JWST NIRCam and NIRSpec observations of a Type Ic supernova (SN Ic) its host galaxy (JADES-GS+53.13533-27.81457) at $z = 2.83$. This SN (named 2023adta) was identified in deep James Webb Space Telescope (JWST)/NIRCam imaging from the Advanced Deep Extragalactic Survey (JADES) Program. Follow-up with JWST/NIRSpec provided spectroscopic redshift 2.83$ classification as Ic-BL. The light curve 2023adta matches well other stripped envelope supernovae we find high peak luminosity, $M_V...
Dust from core-collapse supernovae (CCSNe), specifically Type IIP SNe, has been suggested to be a significant source of the dust observed in high-redshift galaxies. CCSNe eject large amounts newly formed heavy elements, which can condense into grains cooling ejecta. However, infrared (IR) observations typical generally measure masses that are too small account for production needed at high redshifts. IIn classified by their dense circumstellar medium (CSM), also known exhibit strong IR...