White Dwarfs (WDs) are the final evolutionary product of vast majority stars in Universe. They electron-degenerate structures characterized by no stable thermonuclear activity, and their evolution is generally described as a pure cooling process. Their rate adopted cosmic chronometer to constrain age several Galactic populations, including disk, globular open clusters. By analysing high-resolut...

Abstract. Recent developments in tandem laser ablation mass spectrometer technology have demonstrated the capacity for separating parent and daughter isotopes of same online. As a result, beta-decay chronometers can now be applied to geological archive situ as opposed through traditional whole-rock digestions. One novel application this technique is Rb–Sr dating Proterozoic shales that are domi...

ABSTRAK Ball bullet adalah peluru dengan diameter 6 mm yang biasa digunakan untuk air soft gun. Airsoft gun memanfaatkan gas CO2, green atau udara dimampatkan dalam tabung/chamber. Kapasitas dihasilkan mendorong ball sudah tertentu. Hal ini akibat konstruksi sistem pelepasan mampat tersebut. Pada penelitian dibuat alat pelontar dapat di variasikan tekanannya. Variasi tekanan berdampak terhadap ...

The Hubble tension seems to be a crisis with $\sim5\sigma$ discrepancy between the most recent local distance ladder measurement from type Ia supernovae calibrated by Cepheids and global fitting constraint cosmic microwave background data. To narrow down possible late-time solutions tension, we have used in study [Phys. Rev. D 105, L021301 (2022)] an improved inverse method absolute measurement...

The cosmic curvature density parameter has been constrained in the present work independent of any background cosmological model. reconstruction is performed adopting non-parametric Gaussian Processes (GP). constraints on $\Omega_{k0}$ are obtained via a Markov Chain Monte Carlo (MCMC) analysis. Late-time probes viz., Supernova (SN) distance modulus data, Cosmic Chronometer (CC) and radial Bary...

Achondrite meteorites are remnants of the earliest planetary differentiation processes in Solar System. They have been used to anchor short-lived radiochronometers absolute ages determined from long-lived radiochronometers. More specifically, when comparing isotopic systematics 26Al-26Mg chronometer anchored U-corrected Pb-Pb ages, inferences about distribution 26Al (half-life ∼717 000 yr) prot...