36 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Max Planck Institute for Solar System ResearchDE9 papers
- Kyung Hee UniversityKR8 papers
- Boğaziçi UniversityTR5 papers
- University of GöttingenDE5 papers
- Centre National de la Recherche ScientifiqueFR3 papers
- Istanbul Technical UniversityTR3 papers
- Koç UniversityTR3 papers
- Istanbul UniversityTR2 papers
- Tel Aviv UniversityIL2 papers
- Université Paris CitéFR2 papers
- Adnan Menderes UniversityTR1 paper
- AGH University of KrakowPL1 paper
23 papers
Potentially healthy time evolution in interacting -form fields
Fethi M. Ramazanoğlu, Kıvanç İ. Ünlütürk
It was recently discovered that many self-interacting vector fields can have healthy time evolution when field amplitudes are small, however, further dynamics becomes impossible if…
Underlying mechanisms of phase transitions in scalar-tensor theories
Murat Özinan, Kıvanç İ. Ünlütürk, Fethi M. Ramazanoğlu
Spontaneous scalarization phenomenon in scalar-tensor gravity is known to be a form of phase transition, and it was recently shown that the order of this transition changes dependi…
SPIRAL: Self-Play Incremental Racing Algorithm for Learning in Multi-Drone Competitions
Onur Akgün
This paper introduces SPIRAL (Self-Play Incremental Racing Algorithm for Learning), a novel approach for training autonomous drones in multi-agent racing competitions. SPIRAL disti…
Flow-Aware Ellipsoidal Filtration for Persistent Homology of Recurrent Signals
Omer Bahadir Eryilmaz, Cihan Katar, Max A. Little
Recurrent signals give rise to trajectories that repeatedly return close to earlier states in state space. Many analysis methods therefore require a principled notion of similarity…
Analysis of Pantheon+ supernova data suggests evidence of sign-changing pressure of the cosmological fluid
A. Kazım Çamlıbel, M. Akif Feyizoğlu, İbrahim Semiz
In this work, we revisit/reinterpret/extend the model-independent analysis method (which we now call spread - luminosity distance fitting, spread-LDF) from our previous work. We ap…
Thermodynamic constraints on the citric acid cycle and related reactions in ocean world interiors
Seda Işık, Mohit Melwani Daswani, Emre Işık +2
Icy ocean worlds attract significant interest for their astrobiological potential due to subsurface oceans, organics, and chemical energy sources. We quantify thermodynamic viabili…
Size and shape of the trans-Neptunian object (470316) 2007 OC10: Comparison with thermal data
J. M. Gómez-Limón, R. Leiva, J. L. Ortiz +40
The shapes of only 12 trans-Neptunian objects have been directly measured, offering crucial insights into their internal structure. These properties are strongly connected to the p…
Measurement of substructure-dependent suppression of large-radius jets with charged particles in Pb+Pb collisions with ATLAS
ATLAS Collaboration
Measurements of jet substructure in Pb+Pb collisions provide key insights into the mechanism of jet quenching in the hot and dense QCD medium created in these collisions. This Lett…
Nature of phase transitions and metastability in scalar-tensor theories
Kıvanç İ. Ünlütürk, Semih Tuna, Oğuzhan K. Yamak +1
Compact stars above a critical stellar mass develop large scalar fields in some scalar-tensor theories. This scenario, called spontaneous scalarization, has been an intense topic o…
The Harmonic Oscillator Potential Perturbed by a Combination of Linear and Non-linear Dirac Delta Interactions with Application to Bose-Einstein Condensation
Cenk Akyüz, Fatih Erman, Haydar Uncu
In this paper, we study the bound state analysis of a one dimensional nonlinear version of the Schrödinger equation for the harmonic oscillator potential perturbed by a potenti…
Forward modelling of brightness variations in Sun-like stars -- II. Light curves and variability
N. -E. Nèmec, A. I. Shapiro, E. Işik +2
The amplitude and morphology of light curves of solar-like stars change substantially with increasing rotation rate: brightness variations get amplified and become more regular, wh…
Differentially Private Online Bayesian Estimation With Adaptive Truncation
Sinan Yıldırım
We propose a novel online and adaptive truncation method for differentially private Bayesian online estimation of a static parameter regarding a population. We assume that sensitiv…
A Hypervolume Based Approach to Rank Intuitionistic Fuzzy Sets and Its Extension to Multi-criteria Decision Making Under Uncertainty
Kaan Deveci, Onder Guler
Ranking intuitionistic fuzzy sets with distance based ranking methods requires to calculate the distance between intuitionistic fuzzy set and a reference point which is known to ha…
Weak field and slow motion limits in energy-momentum powered gravity
Ozgur Akarsu, A. Kazim Camlibel, Nihan Katirci +2
We explore the weak field and slow motion limits, Newtonian and Post-Newtonian limits, of the energy-momentum powered gravity (EMPG), viz., the energy-momentum squared gravity (EMS…
Faculae cancel out on the surfaces of active Suns
N. -E. Nèmec, A. I. Shapiro, E. Işık +5
Surfaces of the Sun and other cool stars are filled with magnetic fields, which are either seen as dark compact spots or more diffuse bright structures like faculae. Both hamper de…
Predictions of Astrometric Jitter for Sun-like Stars. III. Fast Rotators
K. Sowmya, N. -E. Nèmec, A. I. Shapiro +3
A breakthrough in exoplanet detections is foreseen with the unprecedented astrometric measurement capabilities offered by instrumentation aboard Gaia space observatory. Besides, as…
Predictions of Astrometric Jitter for Sun-like Stars. II. Dependence on Inclination, Metallicity, and Active-Region Nesting
K. Sowmya, N. -E. Nèmec, A. I. Shapiro +5
Ultra-precise astrometry from the Gaia mission is expected to lead to astrometric detections of more than 20,000 exoplanets in our Galaxy. One of the factors that could hamper such…
Where have all the solar-like stars gone? Rotation period detectability at various inclinations and metallicities
Timo Reinhold, Alexander I. Shapiro, Veronika Witzke +3
The plethora of photometric data collected by the Kepler space telescope has promoted the detection of tens of thousands of stellar rotation periods. However, these periods are not…
Observing and modelling the young solar analogue EK Draconis: starspot distribution, elemental abundances, and evolutionary status
H. V. Şenavcı, T. Kılıçoğlu, E. Işık +4
Observations and modelling of stars with near-solar masses in their early phases of evolution is critical for a better understanding of how dynamos of solar-type stars evolve. We e…
Amplification of brightness variability by active-region nesting in solar-like stars
Emre Işık, Alexander I. Shapiro, Sami K. Solanki +1
Kepler observations revealed that hundreds of stars with near-solar fundamental parameters and rotation periods have much stronger and more regular brightness variations than the S…
Connecting measurements of solar and stellar brightness variations
N. -E. Nèmec, E. Işık, A. I. Shapiro +3
Comparing solar and stellar brightness variations is hampered by the difference in spectral passbands used in observations as well as by the possible difference in the inclination…
Pantheon update on a model-independent analysis of cosmological supernova data
A. K. Çamlıbel, İ. Semiz, M. A. Feyizoğlu
We present an update of our previous work, necessitated by availability of a significantly improved dataset. The work is a model-independent analysis of the cosmological supernova…
Cosmic acceleration driven by dark matter self-interactions: a phenomenological treatment
A. Kazım Çamlıbel
We explore the idea that cosmic acceleration may be a byproduct of late-time effects like structure formation in two steps. First, we consider the equation of state for an inhomoge…