M. Turatto
A5050993892- Gamma-ray bursts and supernovae
- Astronomy and Astrophysical Research
- Pulsars and Gravitational Waves Research
- Stellar, planetary, and galactic studies
- Astrophysics and Cosmic Phenomena
- Astrophysical Phenomena and Observations
- Astronomical Observations and Instrumentation
- Astro and Planetary Science
- Adaptive optics and wavefront sensing
- Astrophysics and Star Formation Studies
- Galaxies: Formation, Evolution, Phenomena
- Geophysics and Gravity Measurements
- Solar and Space Plasma Dynamics
- Calibration and Measurement Techniques
- Medical Imaging and Pathology Studies
- Neutrino Physics Research
- Atmospheric Ozone and Climate
- Nuclear Physics and Applications
- Superconducting Materials and Applications
- Spectroscopy and Laser Applications
- Advanced NMR Techniques and Applications
- Electron Spin Resonance Studies
- History and Developments in Astronomy
- Radio Astronomy Observations and Technology
- Particle Accelerators and Free-Electron Lasers
University of Trento
2005-2024
Osservatorio Astronomico di Padova
2013-2022
National Institute for Astrophysics
2005-2021
Institute for Space Astrophysics and Planetology
2016-2021
Max Planck Institute for Extraterrestrial Physics
2016
Netherlands Institute for Radio Astronomy
2016
Texas Tech University
2016
Office National d'Études et de Recherches Aérospatiales
2013
Max Planck Institute for Astronomy
2013
Trieste Astronomical Observatory
2011-2012
We compute the rate of supernovae (SNe) different types along Hubble sequence normalized to near-infrared luminosity and stellar mass parent galaxies. This is made possible by new complete catalog galaxy magnitudes obtained 2MASS. find that rates all SN types, including Ia, Ib/c II, show a sharp dependence on both morphology () colors galaxies and, therefore, star formation activity. In particular we find, with high statistical significance, type Ia in late factor ~20 higher than E/S0....
Direct detection and spectral characterization of extra-solar planets is one the most exciting but also challenging areas in modern astronomy. The challenge consists very large contrast between host star planet, larger than 12.5 magnitudes at small angular separations, typically inside seeing halo. whole design a "Planet Finder" instrument therefore optimized towards reaching highest limited field view short distances from central star. Both evolved young planetary systems can be detected,...
Type Ia supernovae are important cosmological distance indicators. Each of these bright supposedly results from the thermonuclear explosion a white dwarf star that, after accreting material companion star, exceeds some mass limit, but true nature progenitor system remains controversial. Here we report spectroscopic detection circumstellar in normal type supernova explosion. The expansion velocities, densities, and dimensions envelope indicate that this was ejected system. In particular,...
The SHINE program is a large high-contrast near-infrared survey of 600 young, nearby stars. It aimed at searching for and characterizing new planetary systems using VLT/SPHERE's unprecedented high-angular resolution imaging capabilities. also intends placing statistical constraints on the occurrence orbital properties giant planet population orbits as function stellar host mass age to test formation theories. We use IRDIS dual-band imager IFS integral field spectrograph SPHERE acquire...
We report the results of a three-year-long dedicated monitoring campaign restless luminous blue variable (LBV) in NGC 7259. The object, named SN 2009ip, was observed photometrically and spectroscopically optical near-infrared domains. monitored number erupting episodes past few years, increased density our observations during eruptive episodes. In this paper, we present full historical data set from 2009 to 2012 with multi-wavelength dense coverage two high-luminosity events between August...
The Public European Southern Observatory Spectroscopic Survey of Transient Objects (PESSTO) began as a public spectroscopic survey in April 2012. We describe the data reduction strategy and products which are publicly available through ESO archive Data Release 1 (SSDR1). PESSTO uses New Technology Telescope with EFOSC2 SOFI to provide optical NIR spectroscopy imaging. target supernovae transients brighter than 20.5mag for classification. Science targets then selected follow-up based on...
We present and discuss the photometric spectroscopic evolution of peculiar SN 1998bw, associated with GRB 980425, through an analysis optical near-IR data collected at ESO-La Silla. The data, spanning period from day -9 to +376 (relative B maximum), have shown that this supernova (SN) was unprecedented, although somewhat similar 1997ef. Maximum expansion velocities as high 3 × 104 km s-1 some extent mask its resemblance other Type Ic SNe. At intermediate phases, between photospheric fully...
We present photometry and spectra of the Type IIP supernova 1999em in NGC 1637 from several days after outburst till day 642. The radioactive tail recovered bolometric light curve SN indicates that amount ejected 56Ni is . Hα He i 10 830-Å lines at nebular epoch show distribution bulk can be represented approximately by a sphere with velocity 1500 km s−1, which shifted towards far hemisphere about 400 s−1. fine structure photospheric reminiscent 'Bochum event' 1987A analysed terms two...
Photometric and spectroscopic data of the energetic Type Ic supernova (SN) 2002ap are presented, properties SN investigated through models its spectral evolution light curve. The is spectroscopically similar to "hypernova" 1997ef. However, kinetic energy [~(4-10) × 1051 ergs] mass ejected (2.5-5 M☉) smaller, resulting in a faster evolving synthesized ~0.07 M☉ 56Ni, peak luminosity was that normal SNe. Brightness alone should not be used define hypernova, whose defining character, namely very...
The photometric and spectroscopic properties of 26 well observed Type Ia Supernovae (SNeIa) were analyzed with the aim to explore SNIa diversity. sample includes (Branch-)normal SNe as extreme events like 1991T 1991bg, while truly peculiar SNIa, SN2000cx SN2002cx are not included in our . A statistical treatment reveals existence three different groups. first group (FAINT) consists faint SNeIa similar SN1991bg, low expansion velocities rapid evolution SiII velocity. second ``normal'' SNeIa,...
The results of a worldwide coordinated observational campaign on the broad-lined Type Ic supernova (SN Ic) 2003jd are presented. In total, 74 photometric data points and 26 spectra were collected using 11 different telescopes. SN is one most luminous ever observed. A comparison with other supernovae (SNe confirms that represents an intermediate case between broad-line events (2002ap, 2006aj) highly energetic SNe (1997ef, 1998bw, 2003dh, 2003lw), ejected mass Mej= 3.0 ± 1 M⊙ kinetic energy...
In this paper we present spectroscopic and photometric observations for four core collapse supernovae (SNe), namely SNe 1994N, 1999br, 1999eu 2001dc. Together with SN 1997D, show that they form a group of exceptionally low-luminosity events. These have narrow spectral lines (indicating low expansion velocities) luminosities at every phase (significantly lower than those typical core-collapse supernovae). The very luminosity during the ^{56}Co radioactive decay tail indicates mass ^{56}Ni...
The only supernovae (SNe) to show gamma-ray bursts (GRBs) or early x-ray emission thus far are overenergetic, broad-lined type Ic SNe (hypernovae, HNe). Recently, SN 2008D has shown several unusual features: (i) weak flash (XRF), (ii) an early, narrow optical peak, (iii) disappearance of the broad lines typical HNe, and (iv) development helium as in Ib. Detailed analysis shows that was not a normal supernova: Its explosion energy (E approximately 6x10(51) erg) ejected mass [ 7 times Sun...
We present the results of one-year long observational campaign type II plateau SN 2005cs, which exploded in nearby spiral galaxy M51 (the Whirlpool galaxy). This extensive data set makes 2005cs best observed low-luminosity, 56Ni-poor event so far and one core-collapse supernovae ever. The optical near-infrared spectra show narrow P-Cygni lines characteristic this family, are indicative a very low expansion velocity (about 1000 km s−1) ejected material. light curves cover both phase late-time...
The type la supernova SN 1994D in NGC 4526 was extensively observed as a target of opportunity at ESO. In this paper, we present and discuss the UBVRI photometry spectra collected during campaign from 11 days before maximum to about two months afterwards. Several absorption components Na I D lines arising our Galaxy, high-velocity clouds located between have been identified high resolution spectrum. total amount reddening related these features has estimated E(B- V)=0.06. light curve shapes...
We present new spectroscopic and photometric data of the type Ibn supernovae 2006jc, 2000er 2002ao. discuss general properties this recently proposed supernova family, which also includes SN 1999cq. The early-time monitoring traces evolution class objects during first few days after shock breakout. An overall similarity in is found among members group, would be unexpected if energy these core-collapse events was dominated by interaction between ejecta circumstellar medium. Type appear to...
Aims.We present a study of the optical and near-infrared (NIR) properties Type Ia Supernova (SN Ia) 2003du.
The planetary system discovered around the young A-type HR8799 provides a unique laboratory to: a) test planet formation theories, b) probe diversity of architectures at these separations, and c) perform comparative (exo)planetology. We present exploit new near-infrared images integral-field spectra four gas giants surrounding obtained with SPHERE, finder instrument Very Large Telescope, during commissioning science verification phase (July-December 2014). With data, we contribute to...
We present new data for five under-luminous type II-plateau supernovae (SNe IIP), namely SN 1999gn, 2002gd, 2003Z, 2004eg and 2006ov. This sample of low-luminosity SNe IIP (LL IIP) is analyzed together with similar objects studied in the past. All them show a flat light curve plateau lasting about 100 days, an under luminous late-time exponential tail, intrinsic colours that are unusually red, spectra showing prominent narrow P-Cygni lines. A velocity ejected material below 10^3 km/s...
We present comprehensive photometric and spectroscopic observations of the faint transient SN 2008S discovered in NGC 6946. exhibited slow evolution almost no spectral variability during first nine months, implying a high density CS medium. The light curve is similar shape to that 1998S 1979C, although significantly fainter at maximum light. Our quasi-bolometric lightcurve extends 300 days shows tail phase decay rate consistent with ^{56}Co. propose this evidence for an explosion formation...
Extended optical and near-IR observations reveal that SN 2009dc shares a number of similarities with normal Type Ia supernovae (SNe Ia), but is clearly overluminous, (pseudo-bolometric) peak luminosity log (L) = 43.47 (erg s−1). Its light curves decline slowly over half year after maximum [Δm15(B)true= 0.71], the early-time show secondary maxima, although minima between first second peaks are not very pronounced. The bluer bands exhibit an enhanced fading ∼200 d, which might be caused by...