A5050823646- Astrophysical Phenomena and Observations
- Stellar, planetary, and galactic studies
- Astronomical Observations and Instrumentation
- Gamma-ray bursts and supernovae
- Astro and Planetary Science
- Astrophysics and Star Formation Studies
- Pulsars and Gravitational Waves Research
- Astronomy and Astrophysical Research
- Particle Accelerators and Free-Electron Lasers
- Historical Astronomy and Related Studies
- Congenital Heart Disease Studies
- Astrophysics and Cosmic Phenomena
- Maternal and Neonatal Healthcare
- Solar and Space Plasma Dynamics
Institute of Astronomy and Space Physics
2023-2024
University of Buenos Aires
2023-2024
National University of San Juan
2023-2024
Universidade Estadual Paulista (Unesp)
2024
Consejo Nacional de Investigaciones Científicas y Técnicas
2023
National Institute for Space Research
2020-2023
University of Washington
2020-2021
White dwarf symbiotic binaries are detected in X-rays with luminosities the range of 10 30 –10 34 ergs s −1 . Their X-ray emission arises either from accretion disk boundary layer, a region where winds both components collide, or nuclear burning on surface white (WD). In our continuous effort to identify X-ray-emitting stars, we studied four systems using observations Neil Gehrels Swift Observatory and XMM-Newton satellites Transiting Exoplanet Survey Satellite (TESS) optical. The spectra...
Abstract This is the second paper of a series presenting our search for magnetic cataclysmic variables (mCVs) among candidates selected mostly from Catalina Real-Time Transient Survey. We present identification spectra, obtained at SOAR Telescope, as well magnitudes and Gaia distances 45 objects. Of these, 39 objects are identified CVs, which 8 targets show observational characteristics mCVs, being 7 polars 1 intermediate polar. The remaining 31 CVs in sample probably non-magnetic systems,...
Nova Her 2021 was observed with TESS 12.62 days after its most recent outburst in June 12.537 2021. This cataclysmic variable belongs to the intermediate polar class, an spin period of $\sim$501 s and orbital 0.1529 days. During observations Sector 40, 0.1529(1) is detected significantly 17 onset outburst. A modulation, unknown origin, a $\sim$0.537 present data from day 13 until 17.
ABSTRACT Astrometric studies and orbital modelling of planetary moons have contributed significantly to advancing our understanding their dynamics. These require precise positions measured over extended periods. In this paper, we present the results 2021 Brazilian Jovian mutual phenomena campaign. The data correspond eight events between Galilean satellites, in addition a rare eclipse Thebe, an inner satellite, totalling nine events. A geometric model along with DE440/JUP365 ephemerides was...
Abstract We present an analysis of mock X-ray spectra and light curves magnetic cataclysmic variables using upgraded version the 3D cyclops code. This representation accretion flow allows us to properly model total partial occultation postshock region by white dwarf as well modulation due phase-dependent extinction preshock region. carried out detailed modeling in a four-dimensional parameter space varying mass field strength magnetosphere radius specific rate. To calculate temperature...
White dwarf symbiotic binaries are detected in X-rays with luminosities the range of 10$^{30}$ to 10$^{34}$ lumcgs. Their X-ray emission arises either from accretion disk boundary layer, a region where winds both components collide or nuclear burning on white surface. In our continuous effort identify emitting stars, we studied four systems using observations Neil Gehrels Swift Observatory and XMM-Newton satellites TESS optical. The spectra were fit absorbed optically thin thermal plasma...
A endometriose é caracterizada pela presença anormal do tecido endometrial fora útero, levando a uma condição inflamatória crônica benigna, que dependente de estrogênio e frequentemente ligada à dor infertilidade. Essa afecção afeta cerca 10% das mulheres em idade reprodutiva, totalizando mais 170 milhões todo o mundo. Geralmente, incidência maior entre 25 45 anos, sendo prevalente apresentam dismenorreia, infertilidade e/ou pélvica. Embora os mecanismos subjacentes essa ainda sejam objeto...
SW Sextantis systems are nova-like cataclysmic variables that have unusual spectroscopic properties, which thought to be caused by an accretion geometry having part of the mass flux trajectory out orbital plane. Accretion onto a magnetic white dwarf is one proposed scenarios for these systems. To verify this possibility, we analysed photometric and polarimetric time-series data sample six Sex stars. We report possible modulated circular polarization in BO Cet, Sex, UU Aqr with periods 11.1,...
We present an analysis of publicly available X-ray and optical observations TYC 7275-1968-1, a contact binary, red nova progenitor candidate. The long time series ASAS-SN, SuperWASP, CRTS, GAIA, ASAS-3, TESS enabled us to improve its orbital period 0.3828071 $\pm$ 0.0000026 d. show the presence UV source associated with 7275-1968-1 from Neil Gehrels Swift Observatory, that was previously assumed be counterpart CD -36 8436 (V1044 Cen), symbiotic star located 22 arcsec data indicate region...