A5053985562- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Galaxies: Formation, Evolution, Phenomena
- Astrophysics and Star Formation Studies
- Astronomical Observations and Instrumentation
- Gamma-ray bursts and supernovae
- Astro and Planetary Science
- Adaptive optics and wavefront sensing
- Astrophysical Phenomena and Observations
- History and Developments in Astronomy
- Remote Sensing in Agriculture
- Geophysics and Gravity Measurements
- Plant Water Relations and Carbon Dynamics
- Calibration and Measurement Techniques
- Advanced Vision and Imaging
- Scientific Research and Discoveries
- Atmospheric Ozone and Climate
- Scientific Measurement and Uncertainty Evaluation
- Astrophysics and Cosmic Phenomena
- Impact of Light on Environment and Health
- Cosmology and Gravitation Theories
- Atmospheric and Environmental Gas Dynamics
- Isotope Analysis in Ecology
- Remote Sensing and LiDAR Applications
- Data Visualization and Analytics
University of Cambridge
2023-2024
Astronomical Observatory of Capodimonte
2017-2024
Pontificia Universidad Católica de Chile
2019-2023
University of Salerno
2013-2020
Istituto Nazionale di Fisica Nucleare, Sezione di Napoli
2014-2020
California Institute of Technology
2020
International Institute for Advanced Scientific Studies "Eduardo R. Caianiello"
2015-2019
Max Planck Institute for Astronomy
2016
University of Naples Federico II
2014
Istituto Nazionale di Fisica Nucleare, Gruppo Collegato di Salerno
2014
We report the detection of a Cold Neptune m_planet=21+/-2MEarth orbiting 0.38MSol M dwarf lying 2.5-3.3 kpc toward Galactic center as part campaign combining ground-based and Spitzer observations to measure distribution planets. This is first time that complex real-time protocols described by Yee et al. (2015), which aim maximize planet sensitivity while maintaining sample integrity, have been carried out in practice. Multiple survey follow-up teams successfully combined their efforts within...
The $z$~0.1 type-2 QSO J1430+1339 (the 'Teacup') is a complex galaxy showing loop of ionised gas ~10 kpc in diameter, co-spatial radio bubbles, compact (~1 kpc) jet, and outflow activity. We used VLT/MUSE optical integral field spectroscopic observations to characterise the properties effects galactic from up tens scales compare them with those jet. detect velocity dispersion enhancement (>300 km/s) elongated over several perpendicular AGN ionisation lobes, fast outflow, similar what found...
This paper focuses on a class of galaxies characterised by an extremely low surface brightness: ultra-diffuse (UDGs). We used new integral-field (IF) spectroscopic data, obtained with the ESO Large Programme Looking into faintEst WIth MUSE (LEWIS). It provides first homogeneous IF survey performed at Very Telescope complete sample UDGs and low-surface-brightness within virial radius 0.4 in Hydra I cluster, according to UDG abundance-halo mass relation. Our main goals are addressing possible...
We present time-series photometric observations of thirteen transits in the planetary systems WASP-24, WASP-25 and WASP-26. All three have orbital obliquity measurements, WASP-24 WASP-26 been observed with Spitzer, was previously comparatively neglected. Our light curves were obtained using telescope-defocussing method scatters 0.5 to 1.2 mmag relative their best-fitting geometric models. used these data measure physical properties ephemerides high precision, finding that our improved...
Context. The extrasolar planet HAT-P-8 b was thought to be one of the more inflated transiting hot Jupiters. Aims. By using new and existing photometric data, we computed precise estimates physical properties system. Methods. We present observations comprising eleven light curves covering six transit events, obtained five medium-class telescopes telescope-defocussing technique. One simultaneously through four optical filters, two transits were followed contemporaneously from observatories....
We report 13 high-precision light curves of eight transits the exoplanet WASP-52b, obtained by using four medium-class telescopes, through different filters, and adopting defocussing technique. One transit was recorded simultaneously from two observatories another one same site but with instruments, including a multi-band camera. Anomalies were clearly detected in five modelled as starspots occulted planet during events. fitted clean jktebop code, those anomalies prism+gemc codes order to...
We present microlens parallax measurements for 21 (apparently) isolated lenses observed toward the Galactic bulge that were imaged simultaneously from Earth and Spitzer, which was ∼1 AU west of in projection. combine these with a kinematic model Galaxy to derive distance estimates each lens, error bars are small compared Sun's galactocentric distance. The ensemble therefore yields well-defined cumulative distribution lens distances. In principle, it is possible compare this against set...
WASP-80 is one of only two systems known to contain a hot Jupiter which transits its M-dwarf host star. We present eight light curves transit event, obtained simultaneously using defocussed telescopes. These data were taken through the Bessell I, Sloan griz and near-infrared JHK passbands. use our search for opacity-induced changes in planetary radius, but find that all values agree with each other. Our are therefore consistent flat transmission spectrum within observational uncertainties....
We present 17 transit light curves of the ultrashort period planetary system WASP-103, a strong candidate for detection tidally-induced orbital decay. use these to establish high-precision reference epoch timing studies. The time mid-point is now measured an accuracy 4.8 s, versus 67.4 s in discovery paper, aiding future searches With help published spectroscopic measurements and theoretical stellar models, we determine physical properties high precision detailed error budget calculations....
We report the joint WASP/KELT discovery of WASP-167b/KELT-13b, a transiting hot Jupiter with 2.02-d orbit around $V$ = 10.5, F1V star [Fe/H] 0.1 $\pm$ 0.1. The 1.5 R$_{\rm Jup}$ planet was confirmed by Doppler tomography stellar line profiles during transit. place limit $<$ 8 M$_{\rm on its mass. is in retrograde sky-projected spin-orbit angle $\lambda -165^{\circ} \pm 5^{\circ}$. This agreement known tendency for orbits hotter stars to be more likely misaligned. WASP-167/KELT-13 one few...
We present the discovery of KELT-21b, a hot Jupiter transiting $V=10.5$ A8V star HD 332124. The planet has an orbital period $P=3.6127647\pm0.0000033$ days and radius $1.586_{-0.040}^{+0.039}$ $R_J$. set upper limit on planetary mass $M_P<3.91$ $M_J$ at $3\sigma$ confidence. confirmed nature companion using this Doppler tomographic observations to verify that transits These data also demonstrate orbit is well-aligned with stellar spin, sky-projected spin-orbit misalignment...
In this work, we extend the catalog of low-surface brightness (LSB) galaxies, including ultra-diffuse galaxy (UDG) candidates, within ≈0.4 R vir Hydra I cluster galaxies based on deep images from VST Early-type GAlaxy Survey (VEGAS). The new were found by applying an automatic detection tool and carrying out additional visual inspections g r band images. This led to 11 UDGs 8 more LSB galaxies. For all them, assessed membership using color–magnitude relation derived for early-type giant...
We announce the discovery of a highly inflated transiting hot Jupiter by KELT-North survey. A global analysis including constraints from isochrones indicates that V = 10.8 host star (HD 343246) is mildly evolved, G dwarf with K, , an inferred mass and radius . The planetary companion has MJ, RJ, surface gravity density g cm−3. planet on roughly circular orbit semimajor axis AU eccentricity best-fit linear ephemeris days. This one most all known exoplanets, making it few members class...
$K2$'s Campaign 9 ($K2$C9) will conduct a $\sim$3.7 deg$^{2}$ survey toward the Galactic bulge from 7/April through 1/July of 2016 that leverage spatial separation between $K2$ and Earth to facilitate measurement microlens parallax $\pi_{\rm E}$ for $\gtrsim$127 microlensing events. These include several are planetary in nature as well many short-timescale events, which potentially indicative free-floating planets (FFPs). satellite measurements turn allow direct masses distances lensing...
We report the discovery of OGLE-2016-BLG-1190Lb, which is likely to be first Spitzer microlensing planet in Galactic bulge/bar, an assignation that can confirmed by two epochs high-resolution imaging combined source-lens baseline object. The planet's mass M_p= 13.4+-0.9 M_J places it right at deuterium burning limit, i.e., conventional boundary between "planets" and "brown dwarfs". Its existence raises question whether such objects are really (formed within disks their hosts) or "failed...
The extrasolar planet WASP-67 b is the first hot Jupiter definitively known to undergo only partial eclipses. lack of second and third contact point in this planetary system makes it difficult obtain accurate measurements its physical parameters. Aims. By using new high-precision photometric data, we confirm that shows grazing eclipses compute estimates properties parent star. Methods. We present high-quality, multi-colour, broad-band observations comprising five light curves covering two...
Accurate and repeated photometric follow-up observations of planetary-transit events are important to precisely characterize the physical properties exoplanets. A good knowledge main characteristics exoplanets is fundamental trace their origin evolution. Multi-band play an role in this process. By using new data, we computed precise estimates two transiting planetary systems. We present broad-band, multi-colour, obtained three small class telescopes telescope-defocussing technique. For each...
(abridged) Context. Wide binaries are a potential pathway for the formation of hot Jupiters. The binary fraction among host stars is an important discriminator between competing theories, but has not been well characterised. Additionally, contaminating light from unresolved can significantly affect accuracy photometric and spectroscopic measurements in studies transiting exoplanets. Aims. We observed 101 exoplanet systems Southern hemisphere order to create homogeneous catalogue both bound...
We present an analysis of the Qatar-1 and TrES-5 transiting exoplanetary systems, which contain Jupiter-like planets on short-period orbits around K-dwarf stars. Our data comprise a total 20 transit light curves obtained using five medium-class telescopes, operated defocussing technique. The average precision we reach in all our is $RMS_{Q} = 1.1$ mmag for ($V 12.8$) $RMS_{T} 1.0$ 13.7$). use these to refine orbital ephemeris, photometric parameters, measured physical properties two systems....
We present 13 high-precision and four additional light curves of bright southern-hemisphere transiting planetary systems: WASP-22, WASP-41, WASP-42 WASP-55. In the cases WASP-55, these are first follow-up observations since their discovery papers. refined measurements physical properties orbital ephemerides all systems. No indications transit timing variations were seen. All planets have radii inflated above those expected from theoretical models gas-giant planets; WASP-55b is most...
We report the discovery of KELT-12b, a highly inflated Jupiter-mass planet transiting mildly evolved host star. identified initial transit signal in KELT-North survey data and established planetary nature companion through precise follow-up photometry, high-resolution spectroscopy, radial velocity measurements, adaptive optics imaging. Our preferred best-fit model indicates that $V = 10.64$ host, TYC 2619-1057-1, has $T_{\rm eff} 6278 \pm 51$ K, $\log{g_\star} 3.89^{+0.054}_{-0.051}$, [Fe/H]...
The microlensing event OGLE-2015-BLG-0448 was observed by Spitzer and lay within the tidal radius of globular cluster NGC 6558. had moderate magnification intensively observed, hence it potential to probe distribution planets in clusters. We measure proper motion 6558 ($\mu_{\rm cl}$(N,E) = (+0.36+-0.10, +1.42+-0.10) mas/yr) as well source show that lens is not a member. Even though this particular does clusters, other events can be verified using our methodology. Additionally, we find...
In this paper we report on the discovery of 27 low-surface brightness galaxies, which 12 are candidate ultra-diffuse galaxy (UDG) in Hydra I cluster, based deep observations taken as part VST Early-type Galaxy Survey (VEGAS). This first sample UDG candidates cluster represents an important step our project that aims to enlarge number confirmed UDGs and, through study statistically relevant samples, constrain nature and formation UDGs. presents main properties class galaxies cluster. For all...