A5078321577- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Astrophysics and Star Formation Studies
- Astro and Planetary Science
- Astronomical Observations and Instrumentation
- Laser-induced spectroscopy and plasma
- Plant Stress Responses and Tolerance
- Hungarian Social, Economic and Educational Studies
- Laser-Plasma Interactions and Diagnostics
- Gamma-ray bursts and supernovae
- Calibration and Measurement Techniques
- Plant nutrient uptake and metabolism
- Complex Network Analysis Techniques
- Ion-surface interactions and analysis
- Plant Reproductive Biology
- Laser-Matter Interactions and Applications
- Nonlinear Dynamics and Pattern Formation
- Plant Surface Properties and Treatments
- Plant Molecular Biology Research
- Postharvest Quality and Shelf Life Management
- Plant tissue culture and regeneration
- Plant Virus Research Studies
- Legume Nitrogen Fixing Symbiosis
- Chromosomal and Genetic Variations
- Photosynthetic Processes and Mechanisms
HUN-REN Wigner Research Centre for Physics
2020-2025
HUN-REN Centre for Energy Research
2023-2025
Magyar Agrár- és Élettudományi Egyetem
2017-2025
Semmelweis University
2024
Institute of Plant Biology
2021-2023
Institute for Particle and Nuclear Physics
2023
Hungarian Academy of Sciences
1977-2023
University of Debrecen
2021-2023
Innovation Norway (Norway)
2023
National Research, Development and Innovation Office
2022-2023
We report on the discovery of HAT-P-11b, smallest radius transiting extrasolar planet (TEP) discovered from ground, and first hot Neptune to date by transit searches. HAT-P-11b orbits bright (V=9.587) metal rich ([Fe=H] = +0.31 +/- 0.05) K4 dwarf star GSC 03561-02092 with P 4.8878162 0.0000071 days produces a signal depth 4.2 mmag. present global analysis available photometric radial-velocity data that result in stellar planetary parameters, simultaneous treatment systematic variations. The...
We report the discovery of HAT-P-16b, a transiting extrasolar planet orbiting V = 10.8 mag F8 dwarf GSC 2792-01700, with period P 2.775960 +- 0.000003 d, transit epoch Tc 2455027.59293 0.00031 (BJD), and duration 0.1276 0.0013 d. The host star has mass 1.22 0.04 Msun, radius 1.24 0.05 Rsun, effective temperature 6158 +-80 K, metallicity [Fe/H] +0.17 0.08. planetary companion 4.193 0.094 MJ, 1.289 0.066 RJ yielding mean density 2.42 0.35 g/cm3. Comparing these observed characteristics recent...
Abstract The Arabidopsis genome encodes four Dicer-like (DCL) proteins, two of which contain putative nuclear localization signals. This suggests one or more pathways for processing double-stranded (ds) RNA in plants. To study the subcellular location nuclear-encoded dsRNA involved transcriptional silencing, we examined short interfering (si) and micro (mi) accumulation transgenic expressing cytoplasmic variants P19, a viral protein that suppresses posttranscriptional gene silencing. P19...
The promoter homology-dependent inactivation of a 35Spro-hygromycin phosphotransferase (hpt) gene, which is present at the H2 locus, by multipurpose 271 silencing locus has been studied. can silence any gene under control 35Spro as well endogenous nitrite reductase (NiR) genes tobacco because presence chimeric antisense (35Spro-RiN). All F1 progeny cross between homozygous and lines were sensitive to hygromycin chlorotic (a symptom nitrogen deficiency). These phenotypes accompanied reduction...
Using small automated telescopes in Arizona and Hawaii, the HATNet project has detected an object transiting one member of double star system ADS 16402 AB. This is a pair G0 main-sequence stars with age about 3 Gyr at distance ~139 pc projected separation ~1550 AU. The transit signal period 4.46529 days depth 0.015 mag. From follow-up photometry spectroscopy, we find that "hot Jupiter" planet mass 0.53 M_jup radius ~1.36 R_jup traveling orbit semimajor axis 0.055 AU inclination 85.9 deg,...
To study the influence of genomic context on transgene expression, we have determined T-DNA structure, flanking DNA sequences, and chromosomal location four independent loci in tobacco. Two these were stably expressed homozygous condition over many generations, whereas other two became unstable after several generations homozygosity. The comprised relatively simple arrangements that flanked at least one side by plant containing AT-rich regions bind to nuclear matrices vitro. Of unstably...
We report on the latest discovery of HATNet project; a very hot giant planet orbiting bright (V = 10.5) star with small semi-major axis 0.0377 +/- 0.0005 AU. Ephemeris for system is P 2.2047299 0.0000040 days, mid-transit time E 2,453,790.2593 0.0010 (BJD). Based available spectroscopic data host and photometry system, has mass Mp 1.78+/-^{0.08}_{0.05} MJup radius Rp 1.36+/-^{0.20}_{0.09} RJup. The parent slightly evolved F6 M 1.47+/-^{0.08}_{-0.05} Msun,R 1.84+/-^{0.23}_{0.11} Rsun, Teff...
HATSouth is the world's first network of automated and homogeneous telescopes that capable year-round 24-hour monitoring positions over an entire hemisphere sky. The primary scientific goal to discover characterize a large number transiting extrasolar planets, reaching out long periods down small planetary radii. achieves this by extended areas on sky, deriving high precision light curves for stars, searching signature transits, confirming candidates with larger telescopes. employs 6...
We report the discovery of a massive (Mp = 9.04 ± 0.50 MJ) planet transiting bright (V 8.7) F8 star HD 147506, with an orbital period 5.63341 0.00013 days and eccentricity e 0.520 0.010. From transit light curve we determine that radius is Rp 0.982 RJ. 147506b (also coined HAT-P-2b) has mass about 9 times average previously known exoplanets density ρp ≈ 12 g cm-3, greater than rocky planets like Earth. Its are marginally consistent theories structure giant composed pure H He, accounting for...
We report the discovery of four relatively massive (2–7 MJ) transiting extrasolar planets. HAT-P-20b orbits moderately bright V = 11.339 K3 dwarf star GSC 1910-00239 on a circular orbit, with period P 2.875317 ± 0.000004 days, transit epoch Tc 2455080.92661 0.00021 (BJDUTC), and duration 0.0770 0.0008 days. The host has mass 0.76 0.03 M☉, radius 0.69 0.02 R☉, effective temperature 4595 80 K, metallicity [Fe/H] +0.35 0.08. planetary companion 7.246 0.187 MJ 0.867 0.033 RJ yielding mean...
We report on the discovery of HAT-P-12b, a transiting extrasolar planet orbiting moderately bright V ≈ 12.8 K4 dwarf GSC 03033 − 00706, with period P = 3.2130598 ± 0.0000021 d, transit epoch Tc 2454419.19556 0.00020 (BJD), and duration 0.0974 0.0006 d. The host star has mass 0.73 0.02 M☉, radius 0.70+0.02−0.01 R☉, effective temperature 4650 60 K, metallicity [Fe/H] −0.29 0.05. find slight correlation between observed spectral line bisector spans radial velocity, so we consider, rule out,...
We report the discovery of three new transiting extrasolar planets orbiting moderately bright (V = 11.1, 11.7, and 12.4) F stars. The HAT-P-39b through HAT-P-41b have periods P 3.5439 days, 4.4572 2.6940 masses 0.60 MJ, 0.62 0.80 radii 1.57 RJ, 1.73 1.68 respectively. They orbit stars with 1.40 M☉, 1.51 are members an emerging population highly inflated Jupiters 0.4 MJ < M 1.5 R > RJ.
Wide field surveys for transiting planets are well suited to searching diverse stellar populations, enabling a better understanding of the link between properties and their parent stars. We report discovery HAT-P-69b (TOI 625.01) HAT-P-70b 624.01), two new hot Jupiters around A stars from HATNet survey which have also been observed by Transiting Exoplanet Survey Satellite (TESS). has mass 3.58 +0.58/-0.58 MJup radius 1.676 +0.051/-0.033 RJup, residing in prograde 4.79-day orbit. 1.87...
To determine the precise link between anatomical structure and function, brain studies primarily concentrate on wiring of its topological properties. In this work, we investigate weighted degree connection length distributions KKI-113 KKI-18 human connectomes, fruit fly, mouse retina. We find that node strength (weighted degree) distribution behavior differs depending considered scale. On global scale, are found to follow a power-law behavior, with roughly universal exponent close 3....
Having been operational at Kitt Peak for more than a year, the prototype (HAT‐1) of Hungarian Automated Telescope (HAT) has used an all‐sky variability search northern hemisphere. This small autonomous observatory is recording brightness stars in range IC ≈ 6–13 mag with telephoto lens and its 9° × field view, yielding data rate ∼106 photometric measurements per night. We give brief hardware software descriptions system, controlled by single PC running RealTime Linux OS. provide overview...
We report the discovery of a Jupiter-size planet transiting relatively bright (V = 11.56) and metal-rich early K dwarf star with period ~2.9 days. On basis follow-up photometry spectroscopy we determine mass radius planet, HAT-P-3b, to be Mp 0.599 ± 0.026 MJup Rp 0.890 0.046 RJup. The small size object for its implies presence about 75 M⊕ worth heavy elements (~ total mass) based on current theories irradiated extrasolar giant planets, similar core inferred HD 149026b. bulk density HAT-P-3b...
• The staygreen (SGR) gene encodes a chloroplast-targeted protein which promotes chlorophyll degradation via disruption of light-harvesting complexes (LHCs). Over-expression SGR in Arabidopsis (SGR-OX) Columbia-0 (Col-0) background caused spontaneous necrotic flecking. To relate this to the hypersensitive response (HR), Col-0, SGR-OX and RNAi (SGRi) lines were challenged with Pseudomonas syringae pv tomato (Pst) encoding avirulence avrRpm1. Increased decreased expression, respectively,...
We report on the discovery of a planetary system with close-in transiting hot Jupiter near circular orbit and massive outer planet highly eccentric orbit. The inner planet, HAT-P-13b, transits bright V=10.622 G4 dwarf star GSC 3416-00543 every P = 2.916260 \pm 0.000010 days, transit epoch Tc 2454779.92979 0.00038 (BJD) duration 0.1345 0.0017 d. HAT-P-13c orbits P2 428.5 3.0 days nominal center (assuming zero impact parameter) T2c 2454870.4 1.8 or time periastron passage T2,peri= 2454890.05...
We report the discovery of two exoplanets transiting high-jitter stars. HAT-P-32b orbits bright V=11.289 star GSC 3281-00800, with a period P = 2.150008 d. The stellar and planetary masses radii depend on eccentricity system, which is poorly constrained due to high velocity jitter (~80m/s). Assuming circular orbit, has mass 1.16+-0.04 M_sun, radius 1.22+-0.02 R_sun, while planet 0.860+-0.164 MJ, 1.789+-0.025 RJ. When allowed vary, best-fit model results in close filling its Roche Lobe....
We report the discovery by HATSouth survey of HATS-4b, an extrasolar planet transiting a V = 13.46 mag G star. HATS-4b has period P ≈ 2.5167 days, mass Mp 1.32 MJup, radius Rp 1.02 RJup, and density ρp 1.55 ± 0.16 g cm−3 ≈1.24 ρJup. The host star 1.00 M☉, 0.92 R☉, very high metallicity [Fe/H]=0.43 0.08. is among densest known planets with masses between 1 2 MJ thus likely to have significant content heavy elements order 75 M⊕. In this paper we present data reduction, radial velocity...
We report the discovery of HAT-P-30b, a transiting exoplanet orbiting V=10.419 dwarf star GSC 0208-00722. The planet has period P=2.810595+/-0.000005 d, transit epoch Tc = 2455456.46561+/-0.00037 (BJD), and duration 0.0887+/-0.0015 d. host mass 1.24+/-0.04 Msun, radius 1.21+/-0.05 Rsun, effective temperature 6304+/-88 K, metallicity [Fe/H] +0.13+/-0.08. planetary companion 0.711+/-0.028 Mjup, 1.340+/-0.065 Rjup yielding mean density 0.37+/-0.05 g cm^-3. also present radial velocity...
We report the discovery of HATS-1b, a transiting extrasolar planet orbiting moderately bright V=12.05 G dwarf star GSC 6652-00186, and first discovered by HATSouth, global network autonomous wide-field telescopes. HATS-1b has period P~3.4465 d, mass Mp~1.86MJ, radius Rp~1.30RJ. The host 0.99Msun, 1.04Rsun. light curve near continuous coverage over several multi-day periods, demonstrating power using telescopes to discover planets.
We report the discovery by HATSouth survey of HATS-3b, a transiting extrasolar planet orbiting V = 12.4 F dwarf star. HATS-3b has period P 3.5479 days, mass Mp 1.07 MJ, and radius Rp 1.38 RJ. Given planet, brightness host star, stellar rotational velocity (vsin i 9.0 km s−1), this system will make an interesting target for future observations to measure Rossiter–McLaughlin effect determine its spin–orbit alignment. detail low-/medium-resolution reconnaissance spectroscopy that we are now...
We report the discovery of HATS-17b, first transiting warm Jupiter HATSouth network. HATS-17b transits its bright (V=12.4) G-type (M$_{\star}$=1.131 $\pm$ 0.030 M$_{\odot}$, R$_{\star}$=1.091$^{+0.070}_{-0.046}$ R$_{\star}$) metal-rich ([Fe/H]=+0.3 dex) host star in a circular orbit with period P=16.2546 days. has very compact radius 0.777 0.056 R$_J$ given Jupiter-like mass 1.338 0.065 M$_J$. Up to 50% may be composed heavy elements order explain high density current models planetary...