Iris Jermann
YOU?
Author Swipe
View article: Spatially resolved H<i>α</i> emission in B14-65666: Compact starbursts, ionizing efficiency, and gas kinematics in an advanced merger at the Epoch of Reionization
Spatially resolved H<i>α</i> emission in B14-65666: Compact starbursts, ionizing efficiency, and gas kinematics in an advanced merger at the Epoch of Reionization Open
We present MIRI/JWST medium-resolution spectroscopy (MRS) and imaging (MIRIM) of B14-65666, a source identified as a Lyman-break and interacting galaxy at a redshift of z = 7.15. We detect the H α line emission in this system, revealing a …
View article: COSMOS2025: The COSMOS-Web galaxy catalog of photometry, morphology, redshifts, and physical parameters from JWST, HST, and ground-based imaging
COSMOS2025: The COSMOS-Web galaxy catalog of photometry, morphology, redshifts, and physical parameters from JWST, HST, and ground-based imaging Open
We present COSMOS2025, the COSMOS-Web catalog of photometry, morphology, photometric redshifts and physical parameters for more than 700,000 galaxies in the Cosmic Evolution Survey (COSMOS) field. This catalog is based on our \textit{James…
View article: MIRI Deep Imaging Survey (MIDIS) of the Hubble Ultra Deep Field
MIRI Deep Imaging Survey (MIDIS) of the Hubble Ultra Deep Field Open
Context. The recently launched James Webb Space Telescope (JWST) is opening new observing windows on the distant Universe. Among JWST’s instruments, the Mid Infrared Instrument (MIRI) offers the unique capability of imaging observations at…
View article: Insight into the starburst nature of Galaxy GN-z11 with JWST MIRI spectroscopy
Insight into the starburst nature of Galaxy GN-z11 with JWST MIRI spectroscopy Open
This paper presents a deep MIRI/JWST medium-resolution spectroscopy (MRS) covering the rest-frame optical spectrum of the GN-z11 galaxy. The [O III] 5008 Å and H α emission lines are detected and spectroscopically resolved. The line profil…
View article: Insight into the Starburst Nature of Galaxy GN-z11 with JWST MIRI Spectroscopy
Insight into the Starburst Nature of Galaxy GN-z11 with JWST MIRI Spectroscopy Open
This paper presents a deep MIRI/JWST medium resolution spectroscopy (MRS) covering the rest-frame optical spectrum of the GN-z11 galaxy. The [OIII]5008 and H$α$ emission lines are detected and spectroscopically resolved. The line profiles …
View article: MIRI Deep Imaging Survey (MIDIS) of the Hubble Ultra Deep Field
MIRI Deep Imaging Survey (MIDIS) of the Hubble Ultra Deep Field Open
The recently launched James Webb Space Telescope (JWST) is opening new observing windows on the distant universe. Among JWST's instruments, the Mid Infrared Instrument (MIRI) offers the unique capability of imaging observations at waveleng…
View article: MIDIS: The Relation between Strong (Hβ + [O iii]) Emission, Star Formation, and Burstiness around the Epoch of Reionization
MIDIS: The Relation between Strong (Hβ + [O iii]) Emission, Star Formation, and Burstiness around the Epoch of Reionization Open
We investigate the properties of strong (H β + [O iii ]) emitters before and after the end of the “Epoch of Reionization” from z = 8 to z = 5.5. We make use of ultradeep JWST / NIRCam imaging in the parallel field (P2) of the MIRI Deep Ima…
View article: MIDIS: JWST/MIRI Reveals the Stellar Structure of ALMA-selected Galaxies in the Hubble Ultra Deep Field at Cosmic Noon
MIDIS: JWST/MIRI Reveals the Stellar Structure of ALMA-selected Galaxies in the Hubble Ultra Deep Field at Cosmic Noon Open
We present deep James Webb Space Telescope (JWST)/Mid-Infrared Instrument (MIRI) F560W observations of a flux-limited, Atacama Large Millimeter/submillimeter Array (ALMA)-selected sample of 28 galaxies at z = 0.5–3.7 in the Hubble Ultra De…
View article: A NIRCam-dark Galaxy Detected with the MIRI/F1000W Filter in the MIDIS/JADES Hubble Ultra Deep Field
A NIRCam-dark Galaxy Detected with the MIRI/F1000W Filter in the MIDIS/JADES Hubble Ultra Deep Field Open
We report the discovery of Cerberus, an extremely red object detected with the MIRI Deep Imaging Survey (MIDIS) observations in the F1000W filter of the Hubble Ultra Deep Field. The object is detected at signal-to-noise ratio (S/N) ∼ 6, wi…
View article: MIDIS: Unveiling the Role of Strong Hα Emitters During the Epoch of Reionization with JWST
MIDIS: Unveiling the Role of Strong Hα Emitters During the Epoch of Reionization with JWST Open
By using an ultradeep JWST/MIRI image at 5.6 μ m in the Hubble eXtreme Deep Field, we constrain the role of strong H α emitters (HAEs) during “cosmic reionization” at z ≃ 7–8. Our sample of HAEs is comprised of young ( …
View article: Spatially resolved H<i>α</i> and ionizing photon production efficiency in the lensed galaxy MACS1149-JD1 at a redshift of 9.11
Spatially resolved H<i>α</i> and ionizing photon production efficiency in the lensed galaxy MACS1149-JD1 at a redshift of 9.11 Open
We present MIRI/JWST medium-resolution spectroscopy (MRS) and imaging (MIRIM) of the lensed galaxy MACS1149-JD1 at a redshift of z = 9.1092 ± 0.0002, when the Universe was about 530 Myr old. We detect, for the first time, spatially resolve…
View article: Clumpy star formation and an obscured nuclear starburst in the luminous dusty <i>z</i> = 4 galaxy GN20 seen by MIRI/JWST
Clumpy star formation and an obscured nuclear starburst in the luminous dusty <i>z</i> = 4 galaxy GN20 seen by MIRI/JWST Open
Dusty star-forming galaxies emit most of their light at far-infrared to millimeter wavelengths as their star formation is highly obscured. Far-infrared and millimeter observations have revealed their dust, neutral and molecular gas propert…
View article: MIDIS: JWST NIRCam and MIRI Unveil the Stellar Population Properties of Lyα Emitters and Lyman-break Galaxies at z ≃ 3–7
MIDIS: JWST NIRCam and MIRI Unveil the Stellar Population Properties of Lyα Emitters and Lyman-break Galaxies at z ≃ 3–7 Open
We study the stellar population properties of 182 spectroscopically confirmed (MUSE/VLT) Ly α emitters (LAEs) and 450 photometrically selected Lyman-break galaxies (LBGs) at z = 2.8–6.7 in the Hubble Extreme Deep Field. Leveraging the comb…
View article: A NIRCam-dark galaxy detected with the MIRI/F1000W filter in the MIDIS/JADES Hubble Ultra Deep Field
A NIRCam-dark galaxy detected with the MIRI/F1000W filter in the MIDIS/JADES Hubble Ultra Deep Field Open
We report the discovery of Cerberus, an extremely red object detected with the MIRI Deep Imaging Survey (MIDIS) observations in the F1000W filter of the Hubble Ultra Deep Field. The object is detected at $S/N\sim6$, with $\mathrm{F1000W}\s…
View article: <i>α</i>-element enhancements in the ISM of the LMC and SMC: Evidence of recent star formation
<i>α</i>-element enhancements in the ISM of the LMC and SMC: Evidence of recent star formation Open
Context . Important questions regarding the chemical composition of the neutral interstellar medium (ISM) in the Large Magellanic Cloud (LMC) and Small Magellanic Cloud (SMC) are still open. It is usually assumed that their metallicity is …
View article: α-element enhancements in the Magellanic Interstellar Medium: evidence for recent star formation
α-element enhancements in the Magellanic Interstellar Medium: evidence for recent star formation Open
Important questions on the chemical composition of the neutral ISM in the Large Magellanic Cloud (LMC) and Small Magellanic Cloud (SMC) are still open. It is usually assumed that their metallicity is uniform and equal to that measured in h…
View article: Clumpy star formation and an obscured nuclear starburst in the luminous dusty z=4 galaxy GN20 seen by MIRI/JWST
Clumpy star formation and an obscured nuclear starburst in the luminous dusty z=4 galaxy GN20 seen by MIRI/JWST Open
Dusty star-forming galaxies emit most of their light at far-IR to mm wavelengths as their star formation is highly obscured. Far-IR and mm observations have revealed their dust, neutral and molecular gas properties. The sensitivity of JWST…
View article: MIDIS: The Relation between Strong (Hb+[OIII]) Emission, Star Formation and Burstiness Around the Epoch of Reionization
MIDIS: The Relation between Strong (Hb+[OIII]) Emission, Star Formation and Burstiness Around the Epoch of Reionization Open
We investigate the properties of strong (Hb+[OIII]) emitters before and after the end of the Epoch of Reionization from z=8 to z=5.5. We make use of ultra-deep JWST/NIRCam imaging in the Parallel Field of the MIRI Deep Imaging Survey (MIDI…
View article: Dust depletion of metals from local to distant galaxies
Dust depletion of metals from local to distant galaxies Open
The evolution of cosmic dust content and the cycle between metals and dust in the interstellar medium (ISM) play a fundamental role in galaxy evolution. The chemical enrichment of the Universe can be traced through the evolution of the dus…
View article: Dust depletion of of metals from local to distant galaxies II: Cosmic dust-to-metal ratio and dust composition
Dust depletion of of metals from local to distant galaxies II: Cosmic dust-to-metal ratio and dust composition Open
The evolution of the cosmic dust content and the cycle between metals and dust in the interstellar medium (ISM) play a fundamental role in galaxy evolution. The chemical enrichment of the Universe can be traced through the evolution of the…
View article: MIDIS: Unveiling the Role of Strong Ha-emitters during the Epoch of Reionization with JWST
MIDIS: Unveiling the Role of Strong Ha-emitters during the Epoch of Reionization with JWST Open
By using the ultra-deep \textit{JWST}/MIRI image at 5.6 $μm$ in the Hubble eXtreme Deep Field, we constrain the role of strong H$α$-emitters (HAEs) during Cosmic Reionization at $z\simeq7-8$. Our sample of HAEs is comprised of young ($<35\…
View article: MIDIS: JWST NIRCam and MIRI unveil the stellar population properties of Ly$α$-emitters and Lyman-Break galaxies at z ~ 3-7
MIDIS: JWST NIRCam and MIRI unveil the stellar population properties of Ly$α$-emitters and Lyman-Break galaxies at z ~ 3-7 Open
We study the stellar population properties of 182 spectroscopically-confirmed (MUSE/VLT) Lyman-$α$ emitters (LAEs) and 450 photometrically-selected Lyman-Break galaxies (LBGs) at z = 2.8 - 6.7 in the Hubble eXtreme Deep Field (XDF). Levera…
View article: MIDIS: JWST/MIRI reveals the Stellar Structure of ALMA-selected Galaxies in the Hubble-UDF at Cosmic Noon
MIDIS: JWST/MIRI reveals the Stellar Structure of ALMA-selected Galaxies in the Hubble-UDF at Cosmic Noon Open
We present deep James Webb Space Telescope (JWST)/MIRI F560W observations of a flux-limited, ALMA-selected sample of 28 galaxies at z=0.5-3.6 in the Hubble Ultra Deep Field (HUDF). The data from the MIRI Deep Imaging Survey (MIDIS) reveal …
View article: First rest-frame infrared spectrum of a z &gt; 7 quasar: MIRI-MRS observations of J1120+0641
First rest-frame infrared spectrum of a z > 7 quasar: MIRI-MRS observations of J1120+0641 Open
We present a JWST/MRS spectrum of the quasar J1120+0641 at z = 7.0848, the first spectroscopic observation of a reionisation-era quasar in the rest-frame infrared wavelengths (0.6 < λ < 3.4μm). In the context of the mysterious fast assembl…
View article: First rest-frame infrared spectrum of a z>7 quasar: JWST/MRS observations of J1120+0641
First rest-frame infrared spectrum of a z>7 quasar: JWST/MRS observations of J1120+0641 Open
We present a JWST/MRS spectrum of the quasar J1120+0641 at z=7.0848, the first spectroscopic observation of a reionisation-era quasar in the rest-frame infrared ($0.6<λ<3.4μ$m). In the context of the mysterious fast assembly of the first s…
View article: MIDIS: Strong (Hβ+[O iii]) and Hα Emitters at Redshift z ≃ 7–8 Unveiled with JWST NIRCam and MIRI Imaging in the Hubble eXtreme Deep Field
MIDIS: Strong (Hβ+[O iii]) and Hα Emitters at Redshift z ≃ 7–8 Unveiled with JWST NIRCam and MIRI Imaging in the Hubble eXtreme Deep Field Open
We make use of JWST medium-band and broadband NIRCam imaging, along with ultradeep MIRI 5.6 μ m imaging, in the Hubble eXtreme Deep Field to identify prominent line emitters at z ≃ 7–8. Out of a total of 58 galaxies at z ≃ 7–8, we find 18 …
View article: Life beyond 30: Probing the −20 < M <sub>UV</sub> < −17 Luminosity Function at 8 < z < 13 with the NIRCam Parallel Field of the MIRI Deep Survey
Life beyond 30: Probing the −20 < M <sub>UV</sub> < −17 Luminosity Function at 8 < z < 13 with the NIRCam Parallel Field of the MIRI Deep Survey Open
We present the ultraviolet luminosity function and an estimate of the cosmic star formation rate density at 8 < z < 13 derived from deep NIRCam observations taken in parallel with the MIRI Deep Survey of the Hubble Ultra Deep Field (HUDF),…
View article: Sub-millimetre galaxies with <i>Webb</i>
Sub-millimetre galaxies with <i>Webb</i> Open
We utilised the unprecedented depth and resolution of recent early-release science (ERS) JWST observations to define the near-infrared counterparts of sub-millimetre galaxies (SMGs). We identified 45 SCUBA-2 SMG positions within the Cosmic…