A5085468215- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Gamma-ray bursts and supernovae
- Astrophysics and Star Formation Studies
- Adaptive optics and wavefront sensing
- Spectroscopy and Laser Applications
University of Copenhagen
2016-2021
DAWN Center for Independent Living
2021
Technical University of Denmark
2018
ABSTRACT We present the COSMOS2015 24 catalog, which contains precise photometric redshifts and stellar masses for more than half a million objects over 2deg 2 COSMOS field. Including new <?CDATA ${{YJHK}}_{{\rm{s}}}$?> images from UltraVISTA-DR2 survey, Y-band Subaru/Hyper-Suprime-Cam, infrared data Spitzer Large Area Survey with Hyper-Suprime-Cam legacy program, this near-infrared-selected catalog is highly optimized study of galaxy evolution environments in early universe. To maximize...
Abstract Dust-enshrouded, starbursting, submillimeter galaxies (SMGs) at z ≥ 3 have been proposed as progenitors of 2 compact quiescent (cQGs). To test this connection, we present a detailed spatially resolved study the stars, dust, and stellar mass in sample six submillimeter-bright starburst ∼ 4.5. The UV emission probed by HST is extended irregular shows evidence multiple components. Informed , deblend Spitzer /IRAC data rest-frame optical, finding that systems are undergoing minor...
We report two secure ($z=3.775, 4.012$) and one tentative ($z\approx3.767$) spectroscopic confirmations of massive quiescent galaxies through $K$-band observations with Keck/MOSFIRE VLT/X-Shooter. The stellar continuum emission, the absence strong nebular emission lines lack significant far-infrared detections confirm passive nature these objects, disfavoring alternative solution low-redshift dusty star-forming interlopers. derive masses $\mathrm{log}(M_{\star}/M_\odot)\sim11$ ongoing star...
[Abridged] We combine new CO(1-0) line observations of 24 intermediate redshift galaxies (0.03 < z 0.28) along with literature data at 0<z<4 to explore scaling relations between the dust and gas content using PAH 6.2 $\mu$m ($L_{6.2}$), CO ($L'_{\rm CO}$), infrared ($L_{\rm IR}$) luminosities for a wide range redshifts physical environments. Our analysis confirms existence universal $L_{6.2}-L_{\rm CO}$ correlation followed by normal star-forming (SFGs) starbursts (SBs) all redshifts. This...
We present the rest-frame optical sizes of massive quiescent galaxies (QGs) at $z\sim4$ measured $K'$-band with Infrared Camera and Spectrograph (IRCS) AO188 on Subaru telescope. Based a deep multi-wavelength catalog in XMM-Newton Deep Survey Field (SXDS), covering wide wavelength range from $u$-band to IRAC $8.0\mu m$ over 0.7 deg$^2$, we evaluate photometric redshift identify ($M_{\star}\sim10^{11}\ M_\odot$) suppressed star formation. These show prominent 4000$\rm \AA$ break feature...
We present a detailed analysis of large sample spectroscopically confirmed ultra-massive quiescent galaxies (${\rm{log}}(M_{\ast}/M_{\odot})\sim11.5$) at $z\gtrsim2$. This comprises 15 selected in the COSMOS and UDS fields by their bright K-band magnitudes followed up with VLT/X-shooter spectroscopy HST/WFC3 $H_{F160W}$ imaging. These observations allow us to unambiguously confirm redshifts ascertain nature stellar ages, reliably assess internal kinematics effective radii. find that these...
We present the first stellar velocity dispersion measurement of a massive quenching galaxy at z=4.01. The is identified as z>~4 with suppressed star formation from photometric redshifts based on deep multi-band data in UKIDSS Ultra Deep Survey field. A follow-up spectroscopic observation MOSFIRE Keck revealed strong multiple absorption features, which are Balmer lines, giving secure redshift Thanks to high S/N spectrum, we able estimate dispersion, sigma=268+/-59 km/s. This consistent that...
Abstract Optically compact star-forming galaxies (SFGs) have been proposed as immediate progenitors of quiescent galaxies, although their origin and nature are debated. Were they formed in slow secular processes or rapid merger-driven starbursts? Answering this question would provide fundamental insight into how quenching occurs. We explore the location general population with respect to structural relations, identify SFGs based on stellar core densities, study three diagnostics burstiness...
We report the discovery of eMACSJ1341-QG-1, a quiescent galaxy at $z=1.594$ located behind massive cluster eMACSJ1341.9$-$2442 ($z=0.835$). The system was identified as gravitationally lensed triple image in Hubble Space Telescope images obtained part snapshot survey most X-ray luminous clusters $z>0.5$ and spectroscopically confirmed ground-based follow-up observations with ESO/X-Shooter spectrograph. From constraints provided by image, we derive first, crude model mass distribution lens,...
We examine the Fundamental Plane (FP) and mass-to-light ratio ($M/L$) scaling relations using largest sample of massive quiescent galaxies at $1.5<z<2.5$ to date. The FP ($r_{e}, \sigma_{e}, I_{e}$) is established $19$ $UVJ$ from COSMOS with $Hubble$ $Space$ $Telescope$ $(HST)$ $H_{F160W}$ rest-frame optical sizes X-shooter absorption line measured stellar velocity dispersions. For a very massive, ${\rm{log}}(M_{\ast}/M_{\odot})>11.26$, subset 8 $z>2$, Stockmann et al. (2020), we show that...
Abstract Most molecular gas studies of z > 2.5 galaxies are intrinsically bright objects, despite the galaxy population being primarily normal with less extreme star formation rates. Observations at high redshift provide a more representative view evolution and formation, but such observations challenging to obtain. In this work, we present Atacama Large Millimeter/submillimeter Array 12 CO(J = 3 → 2) submillimeter selected group 2.9, resulting in spectroscopic confirmation seven images...
This work presents an in-depth analysis of four gravitationally lensed red galaxies at z = 1.6-3.2. The sources are magnified by factors 2.7-30 foreground clusters, enabling spectral and morphological measurements that otherwise challenging. Our sample extends below the characteristic mass stellar function is thus more representative quiescent galaxy population > 1 than previous spectroscopic studies. We analyze deep VLT/X-SHOOTER spectra multi-band Hubble Space Telescope photometry cover...