A5065482928- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Gamma-ray bursts and supernovae
- Astronomical Observations and Instrumentation
- Astrophysics and Cosmic Phenomena
- Adaptive optics and wavefront sensing
- Remote Sensing in Agriculture
- Advanced Vision and Imaging
- Spectroscopy and Laser Applications
- Astrophysical Phenomena and Observations
- Scientific Research and Discoveries
- Laser-Plasma Interactions and Diagnostics
- Advanced Research in Science and Engineering
- Advanced Image Processing Techniques
- Calibration and Measurement Techniques
University of California, Riverside
2017-2022
Max Planck Institute for Extraterrestrial Physics
2014-2020
Ludwig-Maximilians-Universität München
2015-2019
Stuttgart Observatory
2015-2017
Optica
2014-2016
Max Planck Society
2014-2016
University of Hong Kong
2015
University of Missouri
2010
We present the KMOS^3D survey, a new integral field survey of over 600 galaxies at 0.7<z<2.7 using KMOS Very Large Telescope (VLT). The utilizes synergies with multi-wavelength ground and space-based surveys to trace evolution spatially-resolved kinematics star formation from homogeneous sample 5 Gyrs cosmic history. Targets, drawn mass-selected parent 3D-HST cover formation-stellar mass ($M_*$) rest-frame $(U-V)-M_*$ planes uniformly. describe selection targets, observations, data...
In this paper we follow up on our previous detection of nuclear ionized outflows in the most massive (log(M*/Msun) >= 10.9) z~1-3 star-forming galaxies (Forster Schreiber et al.), by increasing sample size a factor six (to 44 above log(M*/Msun) from combination SINS/zC-SINF, LUCI, GNIRS, and KMOS^3D spectroscopic surveys. We find fairly sharp onset incidence broad emission (FWHM Ha, [NII], [SII] lines ~ 450-5300 km/s), with large [NII]/Ha ratios, 10.9, about two thirds mass range exhibiting...
ABSTRACT We present measurements of the [N ii ]/H α ratio as a probe gas-phase oxygen abundance for sample 419 star-forming galaxies at z = 0.6–2.7 from KMOS 3D near-IR multi-integral field unit (IFU) survey. The mass–metallicity relation (MZR) is determined consistently with same selection, metallicity tracer, and methodology over wide redshift range probed by find good agreement long-slit surveys in literature, except low-mass slope <?CDATA $z\sim 2.3$?> , where this less biased than...
We present the $0.6
We present the correlations between stellar mass, star formation rate (SFR) and [NII]/Ha flux ratio as indicator of gas-phase metallicity for a sample 222 galaxies at 0.8 < z 2.6 log(M*/Msun)=9.0-11.5 from LUCI, SINS/zC-SINF KMOS3D surveys. This provides unique analysis mass-metallicity relation (MZR) over an extended redshift range using consistent data techniques strong-line indicator. find constant slope low-mass end can fully describe its evolution through characteristic turnover mass...
ABSTRACT We analyze the angular momenta of massive star-forming galaxies (SFGs) at peak cosmic star formation epoch ( z ∼ 0.8–2.6). Our sample ∼360 log( M * / ⊙ ) 9.3–11.8 SFGs is mainly based on KMOS 3D and SINS/zC-SINF surveys H α kinematics, collectively provides a representative subset population. The inferred halo scale momentum distribution broadly consistent with that theoretically predicted for their dark matter halos, in terms mean spin parameter <?CDATA $\langle \lambda \rangle $?>...
We investigate the stellar mass and baryonic Tully-Fisher relations (TFRs) of massive star-forming disk galaxies at redshift z~2.3 z~0.9 as part KMOS^3D integral field spectroscopy survey. Our spatially resolved data allow reliable modelling individual galaxies, including effect pressure support on inferred gravitational potential. At fixed circular velocity, we find higher masses similar compared to z~0.9. Together with decreasing gas-to-stellar ratios redshift, this implies that...
We present spectra of the most massive quiescent galaxy yet discovered at $z>3$, spectroscopically confirmed via detection Balmer absorption features in $H-$ and $K-$bands Keck/MOSFIRE. The confirm a with no significant ongoing star formation, consistent lack rest-frame UV flux overall photometric spectral energy distribution. With stellar mass $3.1^{+0.1}_{-0.2} \times 10^{11} ~\rm{M}_\odot$ $z = 3.493$, this is nearly three times more than highest redshift absorption-line identified known....
Abstract We present near-infrared spectroscopic confirmations of a sample 16 photometrically selected galaxies with stellar masses <?CDATA $\mathrm{log}({M}_{* }/{M}_{\odot })$?> >11 at redshift z > 3 from the XMM-VIDEO and COSMOS-UltraVISTA fields using Keck/MOSFIRE as part Massive Ancient Galaxies At NEar-infrared (MAGAZ3NE) survey. Eight ultramassive (UMGs) have specific star formation rates (sSFR) < 0.03 Gyr −1 , negligible emission lines. Another seven UMGs show lines...
We study the stellar mass functions (SMFs) of star-forming and quiescent galaxies in 11 galaxy clusters at 1.0<z<1.4, drawn from Gemini Observations Galaxies Rich Early Environments (GOGREEN) survey. Based on more than 500 hours Gemini/GMOS spectroscopy, deep multi-band photometry taken with a range observatories, we probe SMFs down to limit 10^9.7 Msun (10^9.5 for galaxies). At this early epoch, fraction is already highly elevated compared field same redshift. The quenched excess (QFE)...
We report the discovery of MAGAZ3NE J095924+022537, a spectroscopically-confirmed protocluster at $z = 3.3665^{+0.0009}_{-0.0012}$ around $UVJ$-quiescent ultra-massive galaxy (UMG; $M_{\star}=2.34^{+0.23}_{-0.34}\times10^{11} {\rm M}_\odot$) in COSMOS UltraVISTA field. present total 38 members (14 spectroscopic and 24 photometric), including UMG. Notably, marked contrast to protoclusters previously reported this epoch which have been found contain predominantly star-forming members, we...
We exploit the deep resolved Halpha kinematic data from KMOS^3D and SINS/zC-SINF surveys to examine largely unexplored outer disk kinematics of star-forming galaxies (SFGs) out peak cosmic star formation. Our sample contains 101 SFGs representative more massive (9.3 < log(M*/Msun) 11.5) main sequence population at 0.6<z<2.6. Through a novel stacking approach we are able constrain rotation curve extending ~4 effective radii. This average exhibits significant drop in velocity beyond turnover,...
Abstract We make publicly available a catalog of calibrated environmental measures for galaxies in the five 3D- Hubble Space Telescope ( HST )/CANDELS deep fields. Leveraging spectroscopic and grism redshifts from survey, multiwavelength photometry CANDELS, wider field public data edge corrections, we derive densities fixed apertures to characterize environment brighter than <?CDATA ${{JH}}_{140}\lt 24$?> mag redshift range $0.5\lt z\lt 3.0$?> . By linking observed mock sample, selected...
We exploit deep integral-field spectroscopic observations with KMOS/VLT of 240 star-forming disks at 0.6 < z 2.6 to dynamically constrain their mass budget. Our sample consists massive ($\gtrsim 10^{9.8} M_\odot$) galaxies sizes $R_e \gtrsim 2$ kpc. By contrasting the observed velocity and dispersion profiles dynamical models, we find that on average stellar content contributes $32^{+8}_{-7}\%$ total mass, a significant spread among (68th percentile range f_star ~ 18 - 62%). Including...
Using a sample of 4 galaxy clusters at $1.35 < z 1.65$ and 10 $0.85 1.35$, we measure the environmental quenching timescale, $t_Q$, corresponding to time required after is accreted by cluster for it fully cease star formation. Cluster members are selected photometric-redshift criterion, categorized as star-forming, quiescent, or intermediate according their dust-corrected rest-frame colors magnitudes. We employ "delayed-then-rapid" model that relates simulated mass accretion rate observed...
We present half-light sizes measured from H${\alpha}$ emission tracing star-formation in 281 star-forming galaxies the KMOS3D survey at 0.7 < z 2.7. Sizes are derived by fitting 2D exponential disk models, with bootstrap errors averaging 20%. a median (mean) of 1.19 (1.26) times larger than those stellar continuum, which due to radial dust gradients places an upper limit on growth size via star formation, just 43% intrinsic scatter. At fixed continuum shows no residual trend mass, formation...
We present results on the environmental dependence of star-forming galaxy main sequence in 11 cluster fields at $1.0 < z 1.5$ from Gemini Observations Galaxies Rich Early Environments Survey (GOGREEN) survey. use a homogeneously selected sample field and galaxies whose membership is derived dynamical analysis. Using [OII]-derived star formation rates (SFRs), we find that have suppressed SFRs fixed stellar mass comparison to their counterparts by factor 1.4 $\pm$ 0.1 ($\sim3.3\sigma$) across...
We present the census of massive (log(M$_{*}$/M$_{\odot}$)$\geq 11$) galaxies at $3<z<6$ identified over COSMOS/UltraVISTA Ultra-Deep field stripes: consisting $\approx100$ and $\approx20$ high-confidence candidates $3<z<4$ $4<z<6$, respectively. The population is comprised post-starburst, UV star-forming dusty-star forming in roughly equal fractions, while UV-star-forming dominate $4<z<6$ . account for various sources biases SED modelling, finding that treatment emission line contamination...
The SAGE-Spec Spitzer Legacy program is a spectroscopic follow-up to the SAGE-LMC photometric survey of Large Magellanic Cloud carried out with Space Telescope. We present an overview and some its first results. aims study life cycle gas dust in Cloud, provide information essential classification point sources observed earlier survey. acquired 224.6 hours observations using InfraRed Spectrograph SED mode Multiband Imaging Photometer for Spitzer. data, along archival spectroscopy objects are...
Abstract We explore the H α emission in massive quiescent galaxies observed by KMOS 3D survey at 0.7 < z 2.7. The line is robustly detected 20 out of 120 UVJ -selected galaxies, and we classify mechanism using width [N ii ]/H ratio. find that AGNs are likely to be responsible for more than half cases. also robust evidence star formation activity nine which detail. kinematics reveal rotating disks five galaxies. dust-corrected rates low (0.2–7 M ⊙ yr −1 ), place these systems significantly...
We analyse the sizes, colour gradients, and resolved stellar mass distributions for 36 massive passive galaxies in cluster XMMUJ2235-2557 at z=1.39 using optical near-infrared Hubble Space Telescope imaging. derive light-weighted S\'ersic fits five HST bands ($i_{775},z_{850},Y_{105},J_{125},H_{160}$), find that size decreases by ~20% going from $i_{775}$ to $H_{160}$ band, consistent with recent studies. then generate spatially maps an empirical relationship between $M_{*}/L_{H_{160}}$...
We describe a new Large Program in progress on the Gemini North and South telescopes: Observations of Galaxies Rich Early Environments (GOGREEN). This is an imaging deep spectroscopic survey 21 galaxy systems at $1<z<1.5$, selected to span factor $>10$ halo mass. The scientific objectives include measuring role environment evolution low-mass galaxies, dynamics stellar contents their host haloes. targets are from SpARCS, SPT, COSMOS SXDS surveys, be evolutionary counterparts today's clusters...
Minor mergers are thought to be responsible for the size growth of quiescent field galaxies with decreasing redshift. We test this hypothesis using cluster environment as a laboratory. Satellite in clusters move at high velocities, making between them rare. The stellar mass-size relation ten and is measured compared $z~\mathtt{\sim}~1$. Our sample contains 344 spectroscopically-confirmed members Gemini/GMOS 182 confirmed HST WFC3 G141 grism spectroscopy. On average, star-forming smaller than...
We study the star formation histories (SFHs) and mass-weighted ages of 331 UVJ-selected quiescent galaxies in 11 galaxy clusters field at 1<z<1.5 from Gemini Observations Galaxies Rich Early ENvironments (GOGREEN) survey. determine SFHs individual by simultaneously fitting rest-frame optical spectroscopy broadband photometry to stellar population models. confirm that are consistent with more massive having on average earlier times. Comparing found those field, we find $M_\ast<10^{11.3}$...