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We are developing X-ray microcalorimeters as a backup option for the baseline detectors in the X-IFU instrument on board the ATHENA space mission led by ESA and to be launched in the early 2030s.5$\times$5 mixed arrays with TiAu…

Instrumentation and Detectors · Physics 2021-02-19 E. Taralli , L. Gottardi , K. Nagayoshi , M. Ridder , S. Visser , P. Khosropanah , H. Akamatsu , J. van der Kuur , M. Bruijn , J. R. Gao

The James Webb Space Telescope has discovered high luminosity galaxies that appear to be "too many" and "too massive" compared to predictions of the Standard LCDM cosmology, suggesting that star formation in the early universe is more rapid…

Cosmology and Nongalactic Astrophysics · Physics 2025-07-30 Joshua J. Ziegler , Katherine Freese , Jonathan Lozano , Gabriele Montefalcone

Measurements of longitudinal flow decorrelations for charged particles are presented in the pseudorapidity range $|\eta| < 1$ using a reference detector at 2.1 $< |\eta_{\mathrm{ref}}| <$ 5.1 in Au+Au collisions at $\sqrt{s_{NN}}$ = 27 GeV…

Nuclear Experiment · Physics 2021-02-03 Maowu Nie

We show that fluctuations of the fireball shape in the longitudinal direction generate nontrivial rapidity correlations that depend not only on the rapidity difference, y_{1} - y_{2}, but also on the rapidity sum, y_{1} + y_{2}. This is…

Nuclear Theory · Physics 2013-03-14 Adam Bzdak , Derek Teaney

We explore the feasibility of estimating primary cosmic ray composition at high energies from the study of two parameters of Extensive Air Showers (EAS) at ground and underground level with Monte Carlo simulations using the new EPOS and…

High Energy Astrophysical Phenomena · Physics 2015-01-12 A. Tapia , D. Melo , F. Sánchez , A. Sedoski Croce , J. M. Figueira , B. García , N. González , M. Josebachuili , D. Ravignani , B. Wundheiler , A. Etchegoyen

The mass ranges of meteors, imaged by electro-optical (EO) cameras and backscatter radar receivers, for the most part do not overlap. Typical EO systems detect meteoroid masses down to 10$^{-5}$ kg or roughly magnitude +2 meteors when using…

Instrumentation and Methods for Astrophysics · Physics 2022-02-23 P. Gural , T. Mills , M. Mazur , P. Brown

New extragalactic measurements of the cloud population-averaged star formation (SF) efficiency per freefall time $\rm\epsilon_{\rm ff}$ from PHANGS show little sign of theoretically predicted dependencies on cloud-scale virial level or…

Infrasound monitoring has proved to be effective in detection of the meteor generated shock waves. When combined with optical observations of meteors, this technique is also reliable for detecting centimeter-sized meteoroids that usually…

Earth and Planetary Astrophysics · Physics 2018-08-29 Manuel Moreno-Ibáñez , Elizabeth A. Silber , Maria Gritsevich , Josep M. Trigo-Rodríguez

A method of indirect measurement of the light quark running mass $\hat{m} = (m_d + m_u)/2$ is elaborated in detail. It is based on measuring 1\%-level azimuthal angular asymmetries in the decay $\tau \rightarrow \nu_\tau + 3\pi$. The latter…

High Energy Physics - Phenomenology · Physics 2009-09-25 J. Stern , N. H. Fuchs , M. Knecht

Radiation feedback from stellar clusters is expected to play a key role in setting the rate and efficiency of star formation in giant molecular clouds (GMCs). To investigate how radiation forces influence realistic turbulent systems, we…

Astrophysics of Galaxies · Physics 2016-10-05 Sudhir Raskutti , Eve C. Ostriker , M. Aaron Skinner

The first interstellar object, `Oumuamua, was discovered in the Solar System by Pan-STARRS in 2017, allowing for a calibration of the impact rate of interstellar meteors of its size $\sim 100\;$m. The discovery of CNEOS 2014-01-08 allowed…

Earth and Planetary Astrophysics · Physics 2022-04-18 Amir Siraj , Abraham Loeb

We combine results from interferometry, asteroseismology and spectroscopy to determine accurate fundamental parameters of 23 bright solar-type stars, from spectral type F5 to K2 and luminosity classes III to V. For some stars we can use…

Solar and Stellar Astrophysics · Physics 2015-05-18 H. Bruntt , T. R. Bedding , P. -O. Quirion , G. Lo Curto , F. Carrier , B. Smalley , T. H. Dall , T. Arentoft , M. Bazot , R. P. Butler

We consider three `four-parameters' dark energy equations of state allowing fast transition from the matter dominated decelerating phase to the current accelerating phase. The fast-varying nature of the dark energy models is quantified by…

Cosmology and Nongalactic Astrophysics · Physics 2017-11-17 Rafael J. F. Marcondes , Supriya Pan

We study relation between stellar mass and halo mass for high-mass halos using a sample of galaxy clusters with accurate measurements of stellar masses from optical and IR data and total masses from X-ray observations. We find that stellar…

Cosmology and Nongalactic Astrophysics · Physics 2018-02-21 Andrey Kravtsov , Alexey Vikhlinin , Alexander Meshscheryakov

In the first paper of this series we examined existing methods of optical meteor trajectory estimation and developed a novel method which simultaneously uses both the geometry and the dynamics of meteors to constrain their trajectories. We…

Earth and Planetary Astrophysics · Physics 2020-01-08 Denis Vida , Peter G. Brown , Margaret Campbell-Brown , Paul Wiegert , Peter S. Gural

The antideuteron and antihelium-3 production rates at high-energy heavy ion collisions are calculated in the framework of fusion mechanism. It is supposed, that anti-p,n,d,^3He participating in the fusion are moving in the mean field of…

Nuclear Theory · Physics 2009-11-10 B. L. Ioffe , I. A. Shushpanov , K. N. Zyablyuk

Evidence abounds that young stellar objects undergo luminous bursts of intense accretion that are short compared to the time it takes to form a star. It remains unclear how much these events contribute to the main-sequence masses of the…

We present thermal infrared observations of the active asteroid (and Geminid meteoroid stream parent) 3200 Phaethon using the Very Large Telescope. The images, at 10.7 micron wavelength, were taken with Phaethon at its closest approach to…

Earth and Planetary Astrophysics · Physics 2019-05-08 David Jewitt , Daniel Asmus , Bin Yang , Jing Li

We introduce a method to reconstruct full rapidity distributions of charged particle multiplicity and net proton yields, crucial for constraining the longitudinal dynamics of nuclear matter created in the beam energy scan program. Employing…

High Energy Physics - Phenomenology · Physics 2024-07-09 Lipei Du

The asteroid (3200) Phaethon is known to be the parent body of the Geminids, although meteor showers are commonly associated with the activity of periodic comets. What is most peculiar to the asteroid is its comet-like activity in the…