A5068668509- Gamma-ray bursts and supernovae
- Astrophysical Phenomena and Observations
- Astrophysics and Cosmic Phenomena
- Stellar, planetary, and galactic studies
- Galaxies: Formation, Evolution, Phenomena
- Advanced Fluorescence Microscopy Techniques
- Optical Imaging and Spectroscopy Techniques
- Astronomy and Astrophysical Research
- Plant Water Relations and Carbon Dynamics
- Sparse and Compressive Sensing Techniques
- Cosmology and Gravitation Theories
- Forest ecology and management
- Remote Sensing in Agriculture
- Neutrino Physics Research
- Morphological variations and asymmetry
Sorbonne Université
2023-2024
Laboratoire de Physique Nucléaire et de Hautes Énergies
2023-2024
Université Paris Cité
2023
Centre National de la Recherche Scientifique
2023
Institut National de Physique Nucléaire et de Physique des Particules
2023
Stockholm University
2023
Inserm
2021
RISE Research Institutes of Sweden
2019
Context. As type Ia supernova cosmology transitions from a statistics-dominated to systematics-dominated era, it is crucial understand the remaining unexplained uncertainties that affect their luminosity, such as those stemming astrophysical biases. Type supernovae are standardisable candles whose absolute magnitude reaches scatter of typically 0.15 mag when empirical correlations with light-curve stretch and colour environmental properties accounted for. Aims. We investigate dependence...
Context. The unprecedented statistics of detected Type Ia supernovae (SNe Ia) brought by the Zwicky Transient Facility (ZTF) enable us to probe impact large-scale structure (LSS) on properties these objects. Aims. goal this paper is explore possible under-dense part LSS intrinsic SALT2 light-curve SNe and uncover biases in SN analyses. Methods. With a volume-limited selection ZTF-Cosmo-DR2 overlapping with SDSS-DR7 survey footprint, we investigated distribution their regard voids galaxy...
Abstract We present the discovery and analysis of SN 2022oqm, a Type Ic supernova (SN) detected <1 day after explosion. The rises to blue short-lived (2 days) initial peak. Early-time spectral observations 2022oqm show hot (40,000 K) continuum with high ionization C O absorption features at velocities 4000 km s −1 , while its photospheric radius expands 20,000 indicating pre-existing distribution expanding C/O material. After ∼2.5 days, both spectrum light curves evolve into those typical...
The nature of the progenitor systems and explosion mechanisms that give rise to Type Ia supernovae (SNe Ia) are still debated. interaction signature circumstellar material (CSM) being swept up by expanding ejecta can constrain type system from which it was ejected. Most previous studies have focused on finding CSM ejected shortly before SN residing close site, resulting in short delay times until starts. We use a sample 3627 SNe Zwicky Transient Facility discovered between 2018 2020 search...
Measurements of the growth rate structures at $z < 0.1$ with peculiar velocity surveys have potential testing validity general relativity on cosmic scales. In this work, we present growth-rate measurements from realistic simulated sets type-Ia supernovae (SNe Ia) Zwicky Transient Facility (ZTF). We describe our simulation methodology, light-curve fitting and estimation. Using maximum likelihood method, derive constraints $f\sigma_8$ using only ZTF SN Ia velocities. carefully tested method...
Early observations of transient explosions can provide vital clues to their progenitor origins. In this paper we present the nearby Type Iax (02cx-like) supernova (SN), SN 2020udy that was discovered within hours ($\sim$7 hr) estimated first light. An extensive dataset ultra-violet, optical, and near-infrared obtained, covering out $\sim$150 d after explosion. peaked at -17.86$\pm$0.43 mag in r band evolved similarly other 'luminous' SNe Iax, such as 2005hk 2012Z. Its well-sampled early...
We introduce a new, to our knowledge, numerical model based on spectral methods for analysis of fluorescence recovery after photobleaching data. The covers pure diffusion and binding (reaction-diffusion) with immobile sites, as well arbitrary bleach region shapes. Fitting the is supported using both conventional recovery-curve-based estimation pixel-based estimation, in which all individual pixels data are utilized. explicitly accounts multiple frames, (and binding) during bleaching,...
Abstract We present observations of SN 2022joj, a peculiar Type Ia supernova discovered by the Zwicky Transient Facility. 2022joj exhibits an unusually red g ZTF − r color at early times and rapid blueward evolution afterward. Around maximum brightness, shows high luminosity ( <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msub> <mml:mrow> <mml:mi>M</mml:mi> </mml:mrow> <mml:mi>g</mml:mi> <mml:mi>ZTF</mml:mi> </mml:msub> <mml:mo>,</mml:mo>...
We present observations of SN 2022joj, a peculiar Type Ia supernova (SN Ia) discovered by the Zwicky Transient Facility (ZTF). 2022joj exhibits an unusually red $g_\mathrm{ZTF}-r_\mathrm{ZTF}$ color at early times and rapid blueward evolution afterward. Around maximum brightness, shows high luminosity ($M_{g_\mathrm{ZTF},\mathrm{max}}\simeq-19.7$ mag), blue broadband ($g_\mathrm{ZTF}-r_\mathrm{ZTF}\simeq-0.2$ shallow Si II absorption lines, consistent with those overluminous, 1991T-like...
A natural way to model the evolution of an object (growth a leaf for instance) is estimate plausible deforming path between two observations. This interpolation process can generate deceiving results when set considered deformations not relevant observed data. To overcome this issue, framework deformation modules allows incorporate in structured patterns coming from prior knowledge on The goal article twofold. First defining new incorporating structures elastic properties objects. Second,...
The nature of the progenitor systems and explosion mechanisms that give rise to Type Ia supernovae (SNe Ia) are still debated. interaction signature circumstellar material (CSM) being swept up by expanding ejecta can constrain type system from which it was ejected. However, most previous studies have focussed on finding CSM ejected shortly before SN explosion, resides close site resulting in short delay times until starts. We used a sample 3\,627 SNe Zwicky Transient Facility (ZTF) were...
Early observations of transient explosions can provide vital clues to their progenitor origins. In this paper we present the nearby Type Iax (02cx-like) supernova (SN), SN 2020udy that was discovered within hours ($\sim$7 hr) estimated first light. An extensive dataset ultra-violet, optical, and near-infrared obtained, covering out $\sim$150 d after explosion. peaked at -17.86$\pm$0.43 mag in r band evolved similarly other 'luminous' SNe Iax, such as 2005hk 2012Z. Its well-sampled early...
We present the discovery and analysis of SN\,2022oqm, a Type Ic supernova (SN) detected $<1$\,day after explosion. The SN rises to blue short-lived (2\,days) initial peak. Early-time spectral observations SN\,2022oqm show hot (40,000\,K) continuum with high-ionization C O absorption features at velocities 4000\,km\,s$^{-1}$, while its photospheric radius expands 20,000\,\kms, indicating pre-existing distribution expanding C/O material. After $\sim2.5$\,days, both spectrum light curves evolve...
Measurements of the growth rate structures at $z < 0.1$ with peculiar velocity surveys have potential testing validity general relativity on cosmic scales. In this work, we present growth-rate measurements from realistic simulated sets type-Ia supernovae (SNe Ia) Zwicky Transient Facility (ZTF). We describe our simulation methodology, light-curve fitting and estimation. Using maximum likelihood method, derive constraints $fσ_8$ using only ZTF SN Ia velocities. carefully tested method...