The Tip of the Red Giant Branch Distance Ladder and the Hubble Constant Siyang Li, Rachael L. Beaton arXiv:2403.17048v1 Announce Type: new Abstract: While the tip of the red giant branch (TRGB) has been used as a distance indicator since the early 1990’s, its application to measure the Hubble Constant as a primary distance indicator occurred only recently. The TRGB is also currently at an interesting crossroads as results from the James Webb Space Telescope (JWST) are beginning to emerge. In this chapter, we provide a review of the TRGB as it is used to measure the Hubble constant. First, we provide an essential reviewRead More →

Supernova Remnant properties and Luminosity Functions in NGC 7793 using MUSE IFS Maria Kopsacheili, Cristina Jim’enez-Palau, Llu’is Galbany, Panayotis Boumis, Ra’ul Gonz’alez-D’iaz arXiv:2403.17053v1 Announce Type: new Abstract: In this study we use MUSE Integral Field Spectroscopy (IFS), along with multi-line diagnostics, for the optical identification of Supernova Remnants (SNRs) in the galaxy NGC 7793. We find in total 238 SNR candidates, 225 of them new identifications, increasing significantly the number of known SNRs in this galaxy. The velocity dispersion of the candidate SNRs was calculated, giving a mean value of 27 $ km,s^{ -1} $. We construct the H$rm alpha$, [S II], [O III], andRead More →

The imprints of galaxy cluster internal dynamics on the Sunyaev-Zeldovich effect ‘Oscar Monllor-Berbegal, David Vall’es-P’erez, Susana Planelles, Vicent Quilis arXiv:2403.17054v1 Announce Type: new Abstract: Forthcoming measurements of the Sunyaev-Zeldovich (SZ) effect in galaxy clusters will dramatically improve our understanding of the main intra-cluster medium (ICM) properties and how they depend on the particular thermal and dynamical state of the associated clusters. Using a sample of simulated galaxy clusters we assess the impact of the ICM internal dynamics on both the thermal and kinetic SZ effects (tSZ and kSZ, respectively). We produce synthetic maps of the SZ effect, for the simulated clusters. For each galaxy clusterRead More →

AXES-SDSS: comparison of SDSS galaxy groups with All-sky X-ray Extended Sources S. Damsted, A. Finoguenov, H. Lietzen, G. A. Mamon, J. Comparat, E. Tempel, I. Dmitrieva, N. Clerc, C. Collins, G. Gozaliasl, D. Eckert arXiv:2403.17055v1 Announce Type: new Abstract: We revisit the picture of X-ray emission of groups through the study of systematic differences in the optical properties of groups with and without X-ray emission and study the effect of large-scale density field on scaling relations. We present the identification of X-ray galaxy groups using a combination of RASS and SDSS data. We include new X-ray reanalysis of RASS, to include very extended (up toRead More →

Cosmic hide and seek: the volumetric rate of X-ray quasi-periodic eruptions R. Arcodia, A. Merloni, J. Buchner, P. Baldini, G. Ponti, A. Rau, Z. Liu, K. Nandra, M. Salvato arXiv:2403.17059v1 Announce Type: new Abstract: Multi-wavelength extragalactic nuclear transients, particularly those detectable as multi-messengers, are among the primary drivers for the next-generation observatories. X-ray quasi-periodic eruptions (QPEs) are the most recent and perhaps most peculiar addition to this group. Here, we report a first estimate of the volumetric rate of QPEs based on the first four discoveries with the eROSITA X-ray telescope onboard the Spectrum Roentgen Gamma observatory. Under the assumption, supported by a suite ofRead More →

AXES-2MRS: A new all-sky catalogue of extended X-ray galaxy groups H. Khalil, A. Finoguenov, E. Tempel, G. A. Mamon arXiv:2403.17061v1 Announce Type: new Abstract: We present a new all-sky catalogue of X-ray detected groups (AXES-2MRS), based on the identification of large X-ray sources found in the ROSAT All-Sky Survey (RASS) with the Two Micron Redshift Survey (2MRS) Bayesian Group Catalogue. We study the basic properties of these galaxy groups to gain insights into the effect of different group selections on the properties. In addition to X-ray luminosity coming from shallow survey data of RASS, we have obtained detailed X-ray properties of the groups by matchingRead More →

A Perfect Tidal Storm: HD 104067 Planetary Architecture Creating an Incandescent World Stephen R. Kane, Tara Fetherolf, Zhexing Li, Alex S. Polanski, Andrew W. Howard, Howard Isaacson, Teo Mov{c}nik, Sadie G. Welter arXiv:2403.17062v1 Announce Type: new Abstract: The discovery of planetary systems beyond the solar system has revealed a diversity of architectures, most of which differ significantly from our system. The initial detection of an exoplanet is often followed by subsequent discoveries within the same system as observations continue, measurement precision is improved, or additional techniques are employed. The HD 104067 system is known to consist of a bright K dwarf host star and aRead More →

Detailed cool star flare morphology with CHEOPS and TESS G. Bruno, I. Pagano, G. Scandariato, H. -G. Flor’en, A. Brandeker, G. Olofsson, P. F. L. Maxted, A. Fortier, S. G. Sousa, S. Sulis, V. Van Grootel, Z. Garai, A. Boldog, L. Kriskovics, M. Gy. Szab’o, D. Gandolfi, Y. Alibert, R. Alonso, T. B’arczy, D. Barrado Navascues, S. C. C. Barros, W. Baumjohann, M. Beck, T. Beck, W. Benz, N. Billot, L. Borsato, C. Broeg, A. Collier Cameron, Sz. Csizmadia, P. E. Cubillos, M. B. Davies, M. Deleuil, A. Deline, L. Delrez, O. D. S. Demangeon, B. -O. Demory, D. Ehrenreich, A. Erikson, J. Farinato, L.Read More →

Magnetic Helicity Signs and Flaring Propensity: Comparing Force-free Parameter with the Helicity signs of H{alpha} Filaments and X-ray Sigmoids V. Aparna, Manolis K. Georgoulis, Petrus C. Martens arXiv:2403.17075v1 Announce Type: new Abstract: Sigmoids produce strong eruptive events. Earlier studies have shown that the ICME axial magnetic field Bz can be predicted with some credibility by observing the corresponding filament or the polarity inversion line in the region of eruption and deriving the magnetic field direction from that. Sigmoids are coronal structures often associated with filaments in the sigmoidal region. In this study, firstly we compare filament chirality with sigmoid handedness to observe their correlation. Secondly,Read More →

Dual AGNs: Precursors of Binary Supermassive Black Hole Formation and Mergers Vida Saeedzadeh, Arif Babul, Suvodip Mukherjee, Michael Tremmel, Thomas R. Quinn, Lucio Mayer arXiv:2403.17076v1 Announce Type: new Abstract: The presence of dual active galactic nuclei (AGN) on scales of a few tens of kpc can be used to study merger-induced accretion on supermassive black holes (SMBHs) and offer insights about SMBH mergers, using dual AGNs as merger precursors. In this study, we use the Romulus25 cosmological simulation to investigate the properties and evolution of dual AGNs. We first analyze the properties of AGNs ($L_{bol} > 10^{43} rm erg/s$) and their neighboring SMBHs (any SMBHsRead More →

A semi-analytical model for the propagation of a structured jet in a magnetized medium Leonardo Garcia-Garcia, Diego Lopez-Camara, Davide Lazzati arXiv:2403.17086v1 Announce Type: new Abstract: This study presents a semi-analytical model that models the effects that a static magnetized medium with a tangled field produces in relativistic collimated jets. The model is a first approximation that addresses the magnetic field present in the medium and is based on pressure equilibrium principles between the jet, cocoon, and external medium. A fraction of the ambient medium field is allowed to be entrained in the cocoon. We find that the jet and cocoon properties are affected at highRead More →

Understanding the Multi-wavelength Thermal Dust Polarization from the Orion Molecular Cloud in Light of the Radiative Torque Paradigm Le Ngoc Tram, Thiem Hoang, Helmut Wiesemeyer, Isabelle Ristorcelli, Karl M. Menten, Nguyen Bich Ngoc, Pham Ngoc Diep arXiv:2403.17088v1 Announce Type: new Abstract: Dust grains are important in various astrophysical processes and serve as indicators of interstellar medium structures, density, and mass. Understanding their physical properties and chemical composition is crucial in astrophysics. Dust polarization is a valuable tool for studying these properties. The Radiative Torque (RAT) paradigm, which includes Radiative Torque Alignment (RAT-A) and Radiative Torque Disruption (RAT-D), is essential to interpret the dust polarization dataRead More →

Large Fluctuations within 1 AU in Protoplanetary Disks John Chambers arXiv:2403.17126v1 Announce Type: new Abstract: Protoplanetary disks are often assumed to change slowly and smoothly during planet formation. Here, we investigate the time evolution of isolated disks subject to viscosity and a disk wind. The viscosity is assumed to increase rapidly at around 900 K due to thermal ionization of alkali metals, or thermionic and ion emission from dust, and the onset of magneto-rotational instability (MRI). The disks generally undergo large, rapid fluctuations for a wide range of time-averaged mass accretion rates. Fluctuations involve coupled waves in temperature and surface density that move radially inRead More →

RIOJA. Complex Dusty Starbursts in a Major Merger B14-65666 at z=7.15 Yuma Sugahara, Javier ‘Alvarez-M’arquez, Takuya Hashimoto, Luis Colina, Akio K. Inoue, Luca Costantin, Yoshinobu Fudamoto, Ken Mawatari, Yi W. Ren, Santiago Arribas, Tom J. L. C. Bakx, Carmen Blanco-Prieto, Daniel Ceverino, Alejandro Crespo G’omez, Masato Hagimoto, Takeshi Hashigaya, Rui Marques-Chaves, Hiroshi Matsuo, Yurina Nakazato, Miguel Pereira-Santaella, Yoichi Tamura, Mitsutaka Usui, Naoki Yoshida arXiv:2403.17133v1 Announce Type: new Abstract: We present JWST NIRCam imaging of B14-65666 (“Big Three Dragons”), a bright Lyman-break galaxy system ($M_text{UV}=-22.5$ mag) at $z=7.15$. The high angular resolution of NIRCam reveals the complex morphology of two galaxy components: galaxy E has aRead More →

Galaxy groups as the ultimate probe of AGN feedback Dominique Eckert, Fabio Gastaldello, Ewan O’Sullivan, Alexis Finoguenov, Marisa Brienza, the X-GAP collaboration arXiv:2403.17145v1 Announce Type: new Abstract: The co-evolution between supermassive black holes and their environment is most directly traced by the hot atmospheres of dark matter halos. Cooling of the hot atmosphere supplies the central regions with fresh gas, igniting active galactic nuclei (AGN) with long duty cycles. Outflows from the central engine tightly couple with the surrounding gaseous medium and provide the dominant heating source preventing runaway cooling. Every major modern hydrodynamical simulation suite now includes a prescription for AGN feedback to reproduceRead More →

The Mass Density of Merging Binary Black Holes Over Cosmic Time Aryanna Schiebelbein-Zwack, Maya Fishbach arXiv:2403.17156v1 Announce Type: new Abstract: The connection between the binary black hole (BBH) mergers observed by LIGO-Virgo-KAGRA (LVK) and their stellar progenitors remains uncertain. Specifically, the fraction $epsilon$ of stellar mass that ends up in BBH mergers and the delay time $tau$ between star formation and BBH merger carry information about the astrophysical processes that give rise to merging BBHs. We model the BBH merger rate in terms of the cosmic star formation history, coupled with a metallicity-dependent efficiency $epsilon$ and a distribution of delay times $tau$, and infer theseRead More →

Runaway OB Stars in the Small Magellanic Cloud III. Updated Kinematics and Insights on Dynamical vs. Supernova Ejections Grant D. Phillips, M. S. Oey, Maria Cuevas, Norberto Castro, Rishi Kothari arXiv:2403.17198v1 Announce Type: new Abstract: We use the kinematics of field OB stars to estimate the frequencies of runaway stars generated by the dynamical ejection scenario (DES), the binary supernova scenario (BSS), and the combined two-step mechanism. We update the proper motions for field OB and OBe stars in the Small Magellanic Cloud (SMC) using Gaia DR3. Our sample now contains 336 stars from the Runaways and Isolated O-Type Star Spectroscopic Survey of the SMCRead More →

Black hole mass estimate in OJ 287 based on the bulk-motion comptonization model Sergey Kuznetsov, Lev Titarchuk arXiv:2403.17267v1 Announce Type: new Abstract: The multi-wavelength outburst activity in the BL Lacertae source OJ 287 has sparked a lot of controversy about whether the source contains one or two black holes (BHs) and what characteristics of this black hole binary would be. In this article we present the results of analysis of the X-ray flaring activity of OJ 287 using the data of Swift/XRT observations. We discovered that the energy spectra in all spectral states can be adequately fit with the XSPEC BMC model (the Comptonization one).Read More →

Robust integration of fast flavor conversions in classical neutrino transport Zewei Xiong, Meng-Ru Wu, Manu George, Chun-Yu Lin arXiv:2403.17269v1 Announce Type: new Abstract: The quantum kinetic evolution of neutrinos in dense environments, such as the core-collapse supernovae or the neutron star mergers, can result in fast flavor conversion (FFC), presenting a significant challenge to achieving robust astrophysical modeling of these systems. Recent works that directly simulate the quantum kinetic transport of neutrinos in localized domains have suggested that the asymptotic outcome of FFCs can be modeled by simple analytical prescriptions. In this Letter, we incorporate the analytical prescriptions into global simulations that solve the classicalRead More →

Galaxy spin direction asymmetry in JWST deep fields Lior Shamir arXiv:2403.17271v1 Announce Type: new Abstract: The unprecedented imaging power of JWST provides new abilities to observe the shapes of objects in the early Universe in a way that has not been possible before. Recently, JWST acquired a deep field image inside the same field imaged in the past as the HST Ultra Deep Field. Computer-based quantitative analysis of spiral galaxies in that field shows that among 34 galaxies for which their rotation of direction can be determined by the shapes of the arms, 24 rotate clockwise, and just 10 rotate counterclockwise. The one-tailed binomial distributionRead More →