A5014131048- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Astrophysics and Star Formation Studies
- Stellar, planetary, and galactic studies
- Astrophysical Phenomena and Observations
- Astronomical Observations and Instrumentation
- Gamma-ray bursts and supernovae
- CCD and CMOS Imaging Sensors
- Spectroscopy and Laser Applications
- Adaptive optics and wavefront sensing
- Astrophysics and Cosmic Phenomena
- Superconducting and THz Device Technology
- Scientific Research and Discoveries
- Plant Water Relations and Carbon Dynamics
- Advanced Thermodynamics and Statistical Mechanics
- Cosmology and Gravitation Theories
- Calibration and Measurement Techniques
- Remote Sensing in Agriculture
- Mechanical and Optical Resonators
- Atomic and Molecular Physics
- Radio Astronomy Observations and Technology
- Spectroscopy and Quantum Chemical Studies
- Advanced Vision and Imaging
- Particle accelerators and beam dynamics
- Advanced Optical Sensing Technologies
University of Southampton
2023-2025
Durham University
2020-2024
University of Rome Tor Vergata
2024
Institute for Complex Systems
2024
Sapienza University of Rome
2024
École Polytechnique Fédérale de Lausanne
2023
Délégation Paris 7
2018-2020
Sorbonne Paris Cité
2018-2020
Université Paris-Saclay
2018-2020
Université Paris Cité
2018-2020
Abstract We present a “super-deblended” far-infrared (FIR) to (sub)millimeter photometric catalog in the Cosmic Evolution Survey (COSMOS), prepared with method recently developed by Liu et al., key adaptations. obtain point-spread function fitting photometry at fixed prior positions including 88,008 galaxies detected VLA 1.4, 3 GHz, and/or MIPS 24 μ m images. By adding specifically carved mass-selected sample (with an evolving stellar mass limit), highly complete of 194,428 is achieved for...
ABSTRACT We investigate the physical conditions of ionized gas in high- z star-forming galaxies using diagnostic diagrams based on rest-frame optical emission lines. The sample consists 701 with an H α detection at <?CDATA $1.4\lesssim z\lesssim 1.7$?> , from Fiber Multi-Object Spectrograph (FMOS)-COSMOS survey, that represent normal population over stellar mass range ${10}^{9.6}\lesssim {M}_{* }/{M}_{\odot }\lesssim {10}^{11.6}$?> those ${M}_{* }\gt {10}^{11}\,{M}_{\odot }$?> being well...
We present a new data release from the Fiber Multi-Object Spectrograph (FMOS)-COSMOS survey, which contains measurements of spectroscopic redshift and flux rest-frame optical emission lines (H$\alpha$, [NII], [SII], H$\beta$, [OIII]) for 1931 galaxies out total 5484 objects observed over 1.7 deg$^2$ COSMOS field. obtained $H$-band $J$-band medium-resolution ($R\sim3000$) spectra with FMOS mounted on Subaru telescope, offers an in-fiber line sensitivity limit $\sim 1 \times...
The SINFONI survey for Unveiling the Physics and Effect of Radiative feedback (SUPER) aims at tracing characterizing ionized gas outflows their impact on star formation in a statistical sample X-ray selected Active Galactic Nuclei (AGN) z$\sim$2. We present first results 21 Type-1 AGN spanning wide range bolometric luminosity (log $\mathrm{L_{bol}}$ = 45.4-47.9 erg/s). main this paper are determining extension gas, occurrence AGN-driven outflows, linking properties such with those AGN. use...
We report ALMA observations of the neutral atomic carbon transitions [CI] and multiple CO lines in a sample $\sim30$ main sequence galaxies at $z\sim1$, including novel information on [CI](2-1) CO(7-6) for 7 such normal objects. complement our with collection $>200$ coverage similar transitions, spanning $z=0-4$ redshift interval variety ambient conditions from local to high-redshift starbursts. find systematic variations [CI]/IR [CI]/high-$J$ ($J=7$) luminosity ratios among various samples....
The use of ultraviolet (UV) emission as a tracer galaxy star-formation rate (SFR) is hampered by dust obscuration. empirical relationship between UV slope, $\beta$, and the ratio far-infrared luminosity, IRX, commonly employed to account for obscured emission. We present simple model that explores physical origin variations in IRX - $\beta$ attenuation relation. A relative increase FUV compared NUV an increasing stellar population age cause towards red slopes fixed IRX. Dust geometry effects...
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 investigate the fraction of close pairs and morphologically identified mergers on above star-forming main sequence (MS) at 0.2$\leq z\leq$2.0. The novelty our work lies in use a non-parametric morphological classification performed resolved stellar mass maps, reducing contamination by non-interacting, high-redshift clumpy galaxies. find that merger rapidly rises to $\geq$70% MS, implying -- already $z{\gtrsim}1$ starburst (SB) events ($\Delta_{\rm MS}\geq$0.6) are almost always associated...
We present the detection of multiple carbon monoxide CO line transitions with ALMA in a few tens infrared-selected galaxies on and above main sequence at z = 1.1−1.7. reliably detected emission (5 − 4), (2 1), (7 6)+[C I]( 3 P 2 1 ) 50, 33, 13 galaxies, respectively, we complemented this information available (4 3) [C 0 fluxes for part sample, by modeling optical-to-millimeter spectral energy distribution. retrieve quasi-linear relation between L IR 4) or 6) main-sequence starbursts,...
Abstract We present observations and analysis of the starburst PACS-819 at z = 1.45 ( M * 10 10.7 ⊙ ), using high-resolution (0.″1; 0.8 kpc) Atacama Large Millimeter/submillimeter Array (ALMA) multiwavelength JWST images from COSMOS-Web program. Dissimilar to Hubble Space Telescope (HST) ACS in rest-frame UV, redder NIRCam MIRI reveal a smooth central mass concentration spiral-like features, atypical for such an intense starburst. Through dynamical modeling CO J 5–4) emission with ALMA, is...
Recent JWST observations have revealed the prevalence of spiral structures at $z > 1$. Unlike in local Universe, origin and consequence spirals this epoch remain unexplored. We use public JWST/NIRCam data from COSMOS-Web survey to map eight massive ($> 10^{10.5}\,\rm M_{\odot}$) star-forming galaxies $z_{\rm spec} \sim 1.5$. present a method for systematically quantifying arms $z>1$, enabling direct measurements flux distributions. Using rest-frame near-IR images, we construct morphological...
Abstract We investigate the properties of active galactic nuclei (AGNs) in brightest submillimeter galaxies (SMGs) COSMOS field. utilize bright sample ALMA/SCUBA-2 Survey (AS2COSMOS), which consists 260 SMGs with S 870 μ m = 0.7–19.2 mJy at z 0–6. perform optical to millimeter spectral energy distribution (SED) modeling for whole sample. identify 24 AGN-host from SEDs. Supplemented by 23 X-ray-detected AGNs (X-ray AGNs), we construct an overall 40 galaxies. The X-ray luminosity upper bounds...
Abstract We have obtained spectroscopic confirmation with Hubble Space Telescope WFC3/G141 of a first sizeable sample nine quiescent galaxies at 2.4 < z 3.3. Their average near-UV/optical rest-frame spectrum is characterized by low attenuation ( A V ∼ 0.6 mag) and strong Balmer break, larger than the 4000 Å corresponding to fairly young age ∼300 Myr. This formally classifies substantial fraction classically selected 3 as post-starbursts, marking their convergence quenching epoch. The...
Abstract We study the carbon monoxide (CO) excitation, mean molecular gas density, and interstellar radiation field (ISRF) intensity in a comprehensive sample of 76 galaxies from local to high redshift ( z ∼ 0–6), selected based on detections their CO transitions J = 2 → 1 5 4 optical/infrared/(sub)millimeter spectral energy distributions (SEDs). confirm existence tight correlation between excitation as traced by (5–4) / (2–1) line ratio R 52 ISRF <mml:math...
We study the interstellar medium (ISM) properties as a function of molecular gas size for 77 infrared-selected galaxies at $z \sim 1.3$. Molecular sizes are measured on ALMA images that combine CO(2-1), CO(5-4) and underlying continuum observations, include CO(4-3), CO(7-6)+[CI]($^3 P_2-^3P_1$), [CI]($^3 P_1-^3P_0$) observations subset sample. The $\gtrsim 46 \%$ our have compact reservoir, lie below optical disks mass-size relation. Compact above main sequence higher CO excitation star...
Theoretical models of galaxy formation suggest that the presence an active galactic nucleus (AGN) is required to regulate growth its host through feedback mechanisms, produced by e.g. AGN-driven outflows. Although such outflows are common both at low and high redshift, a comprehensive picture still missing. The peak epoch assembly (1<z<3) has been poorly explored so far, current observations in this redshift range mostly limited targets with chances be outflowing phase. This paper introduces...
Abstract We present an analysis of the molecular gas properties, based on CO (2−1) emission, 12 starburst galaxies at z ∼ 1.6 selected by having a boost (≳4×) in their star formation rate (SFR) above average star-forming galaxy equivalent stellar mass. ALMA observations are acquired six more than previously reported through our effort. As result larger statistical sample, we significantly detect, for first time high , systematically lower <?CDATA ${L}_{\mathrm{CO}}^{{\prime} }$?> / L IR...
We present the first results of an ALMA survey lower fine structure line atomic carbon [C I]$(^3P_1\,-\,^{3}P_0)$ in far infrared-selected galaxies on main sequence at $z\sim1.2$ COSMOS field. compare our sample with a comprehensive compilation data available literature for local and high-redshift starbursting systems quasars. show that I]($^3P_1$$\rightarrow$$^3P_0$) luminosity correlates global scales infrared $L_{\rm IR}$ similarly to low-$J$ CO transitions. report systematic variation...
We combined the spectroscopic information from 3D-HST survey with Herschel data to characterize Hα dust attenuation properties of a sample 79 main sequence star-forming galaxies at z ~ 1 in GOODS-S field. The was selected far-IR λ = 100 and/or 160 μm and only includes secure detection (S/N > 3). From low resolution spectra we measured redshifts fluxes for whole sample. (A factor 1/1.2 applied observed remove [NII] contamination.) stellar masses (M⋆), infrared (LIR), UV luminosities (LUV)...
We investigate the nature of star-forming galaxies with reduced specific star formation rate (sSFR) and high stellar masses, those `green valley' objects that seemingly cause a reported bending, or flattening, main sequence. The fact such host large bulges recently led some to suggest internal was late event induced sSFRs massive drop in slow downfall, thus sequence bend. have studied detail sample 10 at $0.45<z<1$ secure SFR from Herschel, deep Keck optical spectroscopy, HST imaging CANDELS...
The SINFONI survey for Unveiling the Physics and Effect of Radiative feedback (SUPER) was designed to conduct a blind search AGN-driven outflows on X-ray selected AGN at redshift z$\sim$2 with high ($\sim$2 kpc) spatial resolution, correlate them properties host galaxy central black hole. main aims this paper are: a) derive reliable estimates BH mass accretion rates Type-1 in survey; b) characterize driven winds BLR. We analyzed rest-frame optical UV spectra 21 AGN. found that masses...
We present the discovery of copious molecular gas in halo cid_346, a $z=2.2$ quasar studied as part SINFONI survey for Unveiling Physics and Effect Radiative feedback (SUPER). New Atacama Compact Array (ACA) CO(3-2) observations detect much higher flux (by factor $14\pm5$) than measured on kiloparsec scales ($r\lesssim8$ kpc) using previous snapshot Large Millimeter/submillimeter data. Such additional emission traces structure that extends out to $r\sim200$ kpc projected size, inferred...
ABSTRACT We present spatially resolved kinematics of 27 ALMA-identified dust-obscured star-forming galaxies (DSFGs) at z ∼ 1.3–2.6, as traced by Hα emission using VLT/KMOS near-infrared integral field spectroscopy from the ‘KMOS-ALMA Observations Submillimetre Sources’ (KAOSS) Large Programme. derive rotation curves and velocity dispersion profiles for DSFGs, find that among sources with bright, extended emission, 24 display evidence disc-like kinematics. measure a median...
We present rest-frame optical spectra from the FMOS-COSMOS survey of twelve $z \sim 1.6$ \textit{Herschel} starburst galaxies, with Star Formation Rate (SFR) elevated by $\times$8, on average, above star-forming Main Sequence (MS). Comparing H$α$ to IR luminosity ratio and Balmer Decrement we find that optically-thin regions sources contain average only $\sim 10$ percent total SFR whereas $\sim90$ comes an extremely obscured component which is revealed far-IR observations optically-thick...
Feedback from active galactic nuclei (AGN) is thought to be key in shaping the life cycle of their host galaxies by regulating star-formation activity. Therefore, understand impact AGN on star formation, it essential trace molecular gas out which stars form. In this paper we present first systematic study CO properties hosts at z ≈ 2 for a sample 27 X-ray selected spanning two orders magnitude bolometric luminosity (log L bol / erg s −1 = 44.7 − 46.9) using ALMA Band 3 observations CO(3-2)...