A5019707804- Galaxies: Formation, Evolution, Phenomena
- Astrophysics and Star Formation Studies
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Gamma-ray bursts and supernovae
- Astrophysics and Cosmic Phenomena
- Astrophysical Phenomena and Observations
- Advanced Thermodynamic Systems and Engines
- Radio Astronomy Observations and Technology
- Cosmology and Gravitation Theories
- Particle Detector Development and Performance
- Advanced Combustion Engine Technologies
- CCD and CMOS Imaging Sensors
- Genetically Modified Organisms Research
- Weed Control and Herbicide Applications
- Pesticide and Herbicide Environmental Studies
- Adaptive optics and wavefront sensing
- Black Holes and Theoretical Physics
- Quantum Chromodynamics and Particle Interactions
- Refrigeration and Air Conditioning Technologies
- Spectroscopy and Laser Applications
- History and Developments in Astronomy
- Particle physics theoretical and experimental studies
- Astronomical Observations and Instrumentation
Cornell University
2014-2022
University of Milan
2022
Max Planck Institute for Astronomy
2019
Max Planck Society
2019
Space (Italy)
2009-2010
Leonardo (United States)
2010
Alenia Aermacchi
2009
Thales (Italy)
2009
<i>Context. <i/> AGILE is an Italian Space Agency mission dedicated to observing the gamma-ray Universe. The AGILE's very innovative instrumentation for first time combines a imager (sensitive in energy range 30 MeV–50 GeV), hard X-ray 18–60 keV), calorimeter 350 keV–100 MeV), and anticoincidence system. was successfully launched on 2007 April 23 from Indian base of Sriharikota inserted equatorial orbit with low particle background.<i>Aims. <i/>AGILE provides crucial data study active...
Abstract We describe the CO Luminosity Density at High- z (COLDz) survey, first spectral line deep field targeting CO(1–0) emission from galaxies = 1.95–2.85 and CO(2–1) 4.91–6.70. The main goal of COLDz is to constrain cosmic density molecular gas peak epoch star formation. By both a wide (∼51 arcmin 2 ) (∼9 area, survey designed robustly bright end characteristic luminosity function. An extensive analysis reliability our candidates new techniques provide detailed completeness statistical...
The infrared spectral energy distributions (SEDs) of main-sequence galaxies in the early universe (z > 4) is currently unconstrained as continuum observations are time consuming and not feasible for large samples. We present Atacama Large Millimetre Array (ALMA) Band 8 four at z ~ 5.5 to study their SED shape detail. Our data (rest-frame 110$\rm μm$, close peak emission) allows us constrain luminosity weighted dust temperatures total luminosities. With longer wavelengths, we measure first...
We report the detection of CO($J$=2$\to$1) emission from three massive dusty starburst galaxies at $z$$>$5 through molecular line scans in NSF's Karl G. Jansky Very Large Array (VLA) CO Luminosity Density High Redshift (COLDz) survey. Redshifts for two sources, HDF 850.1 ($z$=5.183) and AzTEC-3 ($z$=5.298), were previously known. revise a previous redshift estimate third source GN10 ($z$=5.303), which we have independently confirmed detections $J$=1$\to$0, 5$\to$4, 6$\to$5, [CII] 158 $\mu$m...
We report the serendipitous discovery of a dusty, starbursting galaxy at $z=5.667$ (hereafter called CRLE) in close physical association with "normal" main-sequence HZ10 $z=5.654$. CRLE was identified by detection [CII], [NII] and CO(2-1) line emission, making it highest redshift, most luminous starburst COSMOS field. This massive, dusty appears to be forming stars rate least 1500$\,M_\odot$ yr$^{-1}$ compact region only $\sim3$ kpc diameter. The dynamical dust emission properties suggest an...
We report interferometric measurements of [NII] 205 um fine-structure line emission from a representative sample three galaxies at z=5-6 using the Atacama Large (sub)Millimeter Array (ALMA). These were previously detected in [CII] and far-infrared continuum span almost two orders magnitude star formation rate (SFR). Our results show least different regimes ionized inter-stellar medium properties for first billion years cosmic time, separated by their L_[CII]/L_[NII] ratio. find extremely low...
We report the first detailed measurement of shape CO luminosity function at high redshift, based on $>$320 hr NSF's Karl G. Jansky Very Large Array (VLA) observations over an area $\sim$60 arcmin$^2$ taken as part Luminosity Density High Redshift (COLDz) survey. COLDz "blindly" selects galaxies their cold gas content through CO($J$=1$\to$0) emission $z$$\sim$2-3 and CO($J$=2$\to$1) $z$$\sim$5-7 down to a limit log($L'_{\rm CO}$/K km s$^{-1}$ pc$^2$)$\simeq$9.5. find that characteristic...
Abstract Recent studies have found a significant evolution and scatter in the relationship between UV spectral slope ( β ) infrared excess (IRX; L IR / at z > 4, suggesting different dust properties of these galaxies. The total far-infrared (FIR) luminosity is key for this analysis, but it poorly constrained normal (main-sequence) star-forming 5 galaxies, where often only one single FIR point available. To better inform estimates luminosity, we construct sample local galaxies three...
We present the first attempt to detect outflows from galaxies approaching Epoch of Reionization (EoR) using a sample 9 star-forming ($\rm SFR=31\pm 20~M_{\odot}~yr^{-1}$) $z\sim 5.5$ for which [CII]158$\mu$m line has been previously obtained with ALMA. fit each Gaussian function and compute residuals by subtracting best fitting model data. combine all find that total signal is characterised flux excess $\sim 0.5$ mJy extended over 1000$ km~s$^{-1}$. Although we cannot exclude part this due...
We examine the effective low-energy theory of adjoint sector Dirac gaugino models and its UV completions, identify main source tuning. A holomorphic scalar mass square (the "$b_M$ term") is generated at same order (1-loop) as "$m_D$ term"), leading to problematic relation $b_M\sim16\pi^2 m_D^2$, somewhat analogous $\mu-B_\mu$ problem gauge mediation. operators contributing sector, evaluate them in various confirming existence this problem. suggest a solution by introducing messenger mixing...
Until recently, determining the rotational properties of galaxies in early universe (z>4, Universe age <1.5Gyr) was impractical, with exception a few strongly lensed systems. Combining high resolution and sensitivity ALMA at (sub-) millimeter wavelengths typically strength [CII] 158um emission line from long-developed dynamical modeling tools raises possibility characterizing gas dynamics both extreme starburst normal star forming disk z~4-7. Using procedure centered around GIPSY's ROTCUR...
We test the use of long-wavelength dust continuum emission as a molecular gas tracer at high redshift, via unique sample 12, z~2 galaxies with observations both and CO(1-0) line (obtained Atacama Large Millimeter Array Karl G. Jansky Very Array, respectively). Our work is motivated by recent, redshift studies that measure masses (\ensuremath{\rm{M}_{\rm{mol}}}) calibration rest-frame $850\mu$m luminosity ($L_\mathrm{850\mu m,rest}$) against CO(1-0)-derived \ensuremath{\rm{M}_{\rm{mol}}}\...
Abstract Using the Very Large Array and ALMA, we have obtained CO(2–1), [C ii ], [N ] line emission multiple dust continuum measurements in a sample of “normal” galaxies at z = 5–6. We report highest-redshift detection low- J CO from Lyman break galaxy, ∼ 5.7. The luminosity implies massive molecular gas reservoir (1.3 ± 0.3)( α /4.5 M ⊙ (K km s −1 pc 2 ) × 10 11 , suggesting low star formation efficiency with depletion timescale order ∼1 Gyr. This is much lower than traditionally observed ≳...
The ALMA SPECtroscopic Survey in the {\it Hubble} Ultra Deep Field is an large program that obtained a frequency scan 3\,mm band to detect emission lines from molecular gas distant galaxies. We here present our search strategy for and continuum sources HUDF. compare several line algorithms used literature, critically account line-widths of candidates when assessing significance. identify sixteen at high fidelity search. Comparing these multi-wavelength data we find all have optical/infrared...
Abstract We examine the rest-frame ultraviolet (UV) properties of 10 [C ii ] λ 158 μ m-detected galaxies at z ∼ 5.5 in COSMOS using new Hubble Space Telescope /Wide Field Camera 3 near-infrared imaging. Together with pre-existing m continuum and line measurements by Atacama Large Millimeter/submillimeter Array, we study their dust attenuation on IRX– β diagram, which connects total emission ( <?CDATA $\propto \,\mathrm{IRX}=\mathrm{log}({L}_{\mathrm{FIR}}/{L}_{1600})$?> ) to line-of-sight...
We report NOrthern Extended Millimetre Array (NOEMA) observations of warm molecular gas traced by CO($5-4$) in a $z \sim 3.2$ gas-rich main-sequence galaxy (MS), initially serendipitously detected CO($3-2$) emission `blind' deep NOEMA observations. Our target shows excitation consistent with that seen 1.5$ MS galaxies ($L'_{\rm CO( 5 - 4)}/L'_{\rm CO (3 2)} = 0.41 \pm 0.14$), albeit toward the low end, as well similar star formation efficiency based on line luminosity and $L_{\rm IR}$....
Abstract ALMA 870 μ m continuum imaging has uncovered a population of blends multiple dusty star-forming galaxies (DSFGs) in sources originally detected with the Herschel Space Observatory . However, their pairwise separations are much smaller than what is found by follow-up other single-dish surveys or expected from theoretical simulations. Using and Very Large Array, we have targeted three these systems to confirm whether lie at same redshift, successfully detecting 12 CO ( J = 3–2) 1–0)...
Radio free-free emission is considered to be one of the most reliable tracers star formation in galaxies. However, as it constitutes faintest part radio spectrum -- being roughly an order magnitude less luminous than synchrotron at GHz frequencies typically targeted surveys usage a rate tracer has mostly remained limited local Universe. Here we perform multi-frequency stacking analysis using deep Karl G. Jansky Very Large Array observations 1.4, 3, 5, 10 and 34 COSMOS GOODS-North fields...
Abstract The high-frequency radio sky has historically remained largely unexplored due to the typical faintness of sources in this regime, and modest survey speed compared observations at lower frequencies. However, surveys offer an invaluable tracer high-redshift star formation, as they directly target faint free–free emission. We present deep continuum 34 GHz COSMOS GOODS-North fields from Karl G. Jansky Very Large Array (VLA), part COLD z survey. mosaic spans <?CDATA $\sim...
We report observations of CO(J = 2 → 1) and line emission toward the quadruply-lensed quasar RXS J1131−1231 at z 0.654 obtained using Plateau de Bure Interferometer (PdBI) Combined Array for Research in Millimeter-wave Astronomy (CARMA). Our lens modeling shows that asymmetry double-horned profile is mainly a result differential lensing, where magnification factor varies from ∼3 to ∼9 across different kinematic components. The intrinsically symmetric smooth source-plane velocity gradient...
We report CO(5$\rightarrow$4) and CO(6$\rightarrow$5) line observations in the dusty starbursting galaxy CRLE ($z = 5.667$) main-sequence (MS) HZ10 5.654$) with Northern Extended Millimeter Array (NOEMA). is most luminous $z>5$ starburst COSMOS field gas-rich "normal" currently known at $z>5$. find luminosities for of (4.9 $\pm$ 0.5) (3.8 0.4) $\times$ 10$^{10}$ K km s$^{-1}$ pc$^{2}$ upper limits $< 0.76$ 0.60$ HZ10, respectively. The CO excitation appears comparable to other star-forming...
We report observations of dense molecular gas in the star-forming galaxy EGS 13004291 (z = 1.197) using Plateau de Bure Interferometer. tentatively detect HCN and HNC emission when stacked together at significance, yielding line luminosities K km s−1 pc2 pc2, respectively. also set 3σ upper limits <7–8 ×109 on , ), HC3N(J 20 → 19) luminosities. serendipitously CO from two sources same field view. CO() 13004291, showing that excitation previously detected is subthermal (). find a luminosity...
Recently, Mexico has launched policies of agroecological transition that seek to foster healthier agri-food systems. One these is the reduction and eventual elimination glyphosate by 2024. Despite being most used herbicide in world, little information exists about what factors determine a greater or reduced use different socio-ecological contexts. This study aimed explore agricultural management, biophysical social variables their effects on maize crops smallholders (&lt;8 ha). A...
One of the last missing pieces in puzzle galaxy formation and evolution through cosmic history is a detailed picture role cold gas supply star-formation process. Cold fuel for star formation, thus regulates buildup stellar mass, both amount material present galaxy's mass fraction, efficiency at which it converted to stars. Over decade, important progress has been made understanding relative importance these two factors along with feedback, first measurements volume density out redshift 4,...