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SpaceX Moves Ahead With Falcon 9 Launches After FAA Go-Ahead The Federal Aviation Administration has ruled that SpaceX can resume Falcon 9 rocket launches while the investigation into a failed July 11 mission continues, and the next liftoff could take place as early as tonight. The FAA’s go-ahead came after SpaceX reported that the failure was caused by a crack in a sense line for a pressure sensor attached to the upper stage’s liquid-oxygen system. That resulted in an oxygen leak that degraded the performance of the upper-stage engine. As a near-term fix, SpaceX is removing the sense line and the sensors for upcoming FalconRead More →

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In: arXiv

Axisymmetric Dynamos Sustained by Ohm’s Law in a Nearly-Spherical Rotating Viscous Fluid Naoki Sato, Kumiko Hori arXiv:2407.17527v1 Announce Type: new Abstract: This work tackles a significant challenge in dynamo theory: the possibility of long-term amplification and maintenance of an axisymmetric magnetic field. We introduce a novel model that allows for non-trivial axially-symmetric steady-state solutions for the magnetic field, particularly when the dynamo operates primarily within a “nearly-spherical” toroidal volume inside a fluid shell surrounding a solid core. In this model, Ohm’s law is generalized to include the restoring friction force, which aligns the velocity of the shell with the rotational speed of the inner coreRead More →

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In: arXiv

Subaru/CHARIS High-Resolution Mode Spectroscopy of the Brown Dwarf Companion HD 33632 Ab Aidan Gibbs, Briley Lewis, Michael Fitzgerald, Timothy Brandt, Minghan Chen, Yiting Li, Rachel Bowens-Rubin, Rebecca Jensen-Clem, Benjamin Mazin arXiv:2407.17531v1 Announce Type: new Abstract: Brown dwarfs (BD) are model degenerate in age and mass. High-contrast imaging and spectroscopy of BD companions to host stars where the mass and age can be independently constrained by dynamics and stellar age indicators respectively provide valuable tests of BD evolution models. In this paper, we present a new epoch of Subaru/CHARIS H- and K-band observations of one such previously discovered system, HD 33632 Ab. We reanalyze the massRead More →

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In: arXiv

exoTEDRF: An EXOplanet Transit and Eclipse Data Reduction Framework Michael Radica arXiv:2407.17541v1 Announce Type: new Abstract: Here, I present the community with exoTEDRF (EXOplanet Transit and Eclipse Data Reduction Framework; formerly known as supreme-SPOON), an end-to-end pipeline for data reduction and light curve analysis of time series observations (TSOs) of transiting exoplanets with JWST. The pipeline is highly modular and designed to produce reliable spectra from raw JWST exposures. exoTEDRF (pronounced exo-tedorf) consists of four stages, each of which are further subdivided into a series of steps. These steps can either be run individually, for example in a Jupyter notebook, or via the command lineRead More →

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In: arXiv

End-to-End simulation framework for astronomical spectrographs: SOXS, CUBES and ANDES A. Scaudo, M. Genoni, G. Li Causi, L. Cabona, M. Landoni, S. Campana, P. Schipani, R. Claudi, M. Aliverti, A. Baruffolo, S. Ben-Ami, F. Biondi, G. Capasso, R. Cosentino, F. D’Alessio, P. D’Avanzo, O. Hershko, H. Kuncarayakti, M. Munari, K. Radhakrishnan Santhakumari, G. Pignata, A. Rubin, S. Scuderi, F. Vitali, D. Young, J. Achr’en, J. A. Araiza-Duran, I. Arcavi, F. Battaini, A. Brucalassi, R. Bruch, E. Cappellaro, M. Colapietro, M. Della Valle, M. De Pascale, R. Di Benedetto, S. D’Orsi, A. Gal-Yam, M. Hernandez, J. Kotilainen, L. Marty, S. Mattila, M. Rappaport, D. Ricci, M.Read More →

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In: arXiv

A closer look at the extended edge-on low-surface brightness galaxies Anna S. Saburova, Damir Gasymov, Evgenii V. Rubtsov, Igor V. Chilingarian, Sviatoslav Borisov, Ivan Gerasimov, Fedor Kolganov, Anastasia V. Kasparova, Roman I. Uklein, Michal B’ilek, Kirill A. Grishin, Anatoly Zasov, Mariia Demianenko, Ivan Yu. Katkov, Ana Lalovi’c, Srdjan Samurovi’c arXiv:2407.17548v1 Announce Type: new Abstract: To understand the origin of extended disks of low-surface brightness (LSB) galaxies, we studied in detail 4 such systems with large disks seen edge-on. Two of them are edge-on giant LSB galaxies (gLSBGs) recently identified by our team. The edge-on orientation of these systems boosts their surface brightnesses that provided anRead More →

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In: arXiv

Determining the Extents, Geometries, and Kinematics of Narrow-Line Region Outflows in Nearby Seyfert Galaxies Garrett E. Polack, Mitchell Revalski, D. Michael Crenshaw, Travis C. Fischer, Henrique R. Schmitt, Steven B. Kraemer, Beena Meena, Marc Rafelski arXiv:2407.17550v1 Announce Type: new Abstract: Outflowing gas from supermassive black holes in the centers of active galaxies has been postulated as a major contributor to galactic evolution. To explore the interaction between narrow-line region (NLR) outflows and their host galaxies, we use Hubble Space Telescope (HST) Space Telescope Imaging Spectrograph (STIS) spectra and Wide Field Camera 3 (WFC3) images of 15 nearby (z arXiv:2407.17550v1 Announce Type: new Abstract: Outflowing gasRead More →

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In: arXiv

The BoRG-JWST Survey: Program Overview and First Confirmations of Luminous Reionization-Era Galaxies from Pure-Parallel Observations Guido Roberts-Borsani, Micaela Bagley, Sof’ia Rojas-Ruiz, Tommaso Treu, Takahiro Morishita, Steven L. Finkelstein, Michele Trenti, Pablo Arrabal Haro, Eduardo Ba~nados, ‘Oscar A. Ch’avez Ortiz, Katherine Chworowsky, Taylor A. Hutchison, Rebecca L. Larson, Nicha Leethochawalit, Gene C. K. Leung, Charlotte Mason, Rachel S. Somerville, Massimo Stiavelli, L. Y. Aaron Yung, Susan A. Kassin, Christian Soto arXiv:2407.17551v1 Announce Type: new Abstract: We present the BoRG-JWST survey, a combination of two JWST Cycle 1 programs aimed at obtaining NIRSpec spectroscopy of representative, UV-bright $75$, highlighting the large abundance of high-redshift galaxies even inRead More →

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In: arXiv

Preliminary Evidence for Lensing-Induced Alignments of High-Redshift Galaxies in JWST-CEERS Viraj Pandya, Abraham Loeb, Elizabeth J. McGrath, Guillermo Barro, Steven L. Finkelstein, Henry C. Ferguson, Norman A. Grogin, Jeyhan S. Kartaltepe, Anton M. Koekemoer, Casey Papovich, Nor Pirzkal, L. Y. Aaron Yung arXiv:2407.17552v1 Announce Type: new Abstract: The majority of low-mass ($log_{10} M_*/M_{odot}=9-10$) galaxies at high redshift ($z>1$) appear elongated in projection. We use JWST-CEERS observations to explore the role of gravitational lensing in this puzzle. The typical galaxy-galaxy lensing shear $gammasim1%$ is too low to explain the predominance of elongated early galaxies with ellipticity $eapprox0.6$. However, non-parametric quantile regression with Bayesian Additive Regression TreesRead More →

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In: arXiv

LiteBIRD Science Goals and Forecasts. Mapping the Hot Gas in the Universe M. Remazeilles (for the LiteBIRD Collaboration), M. Douspis (for the LiteBIRD Collaboration), J. A. Rubi~no-Mart’in (for the LiteBIRD Collaboration), A. J. Banday (for the LiteBIRD Collaboration), J. Chluba (for the LiteBIRD Collaboration), P. de Bernardis (for the LiteBIRD Collaboration), M. De Petris (for the LiteBIRD Collaboration), C. Hern’andez-Monteagudo (for the LiteBIRD Collaboration), G. Luzzi (for the LiteBIRD Collaboration), J. Macias-Perez (for the LiteBIRD Collaboration), S. Masi (for the LiteBIRD Collaboration), T. Namikawa (for the LiteBIRD Collaboration), L. Salvati (for the LiteBIRD Collaboration), H. Tanimura (for the LiteBIRD Collaboration), K. Aizawa (for the LiteBIRDRead More →

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In: arXiv

Observability of dynamical tides in merging eccentric neutron star binaries J’anos Tak’atsy, Bence Kocsis, P’eter Kov’acs arXiv:2407.17560v1 Announce Type: new Abstract: While dynamical tides only become relevant during the last couple of orbits for circular inspirals, orbital eccentricity can increase their impact during earlier phases of the inspiral by exciting tidal oscillations at each close encounter. We investigate the effect of dynamical tides on the orbital evolution of eccentric neutron star binaries using post-Newtonian numerical simulations and constructing an analytic stochastic model. Our study reveals a strong dependence of dynamical tides on the pericenter distance, with the energy transferred to dynamical tides over that dissipatedRead More →

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In: arXiv

Compactness peaks: An astrophysical interpretation of the mass distribution of merging binary black holes Shanika Galaudage, Astrid Lamberts arXiv:2407.17561v1 Announce Type: new Abstract: With the growing number of detections of binary black hole mergers, we are beginning to probe structure in the distribution of masses. A recent study by Schneider et al. proposes that isolated binary evolution of stripped stars naturally gives rise to the peaks at chirp masses $sim 8 M_odot$, $14 M_odot$ in the chirp mass distribution and explains the dearth of black holes between $approx 10-12 M_odot$ in chirp mass. The gap in chirp mass results from an apparent gap in theRead More →

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In: arXiv

The mass of the white dwarf in YY Dra (=DO Dra): Dynamical measurement and comparative study with X-ray estimates Ayoze ‘Alvarez-Hern’andez, Manuel A. P. Torres, Tariq Shahbaz, Pablo Rodr’iguez-Gil, Kosmas D. Gazeas, Javier S’anchez-Sierras, Peter G. Jonker, Jes’us M. Corral-Santana, Jose A. Acosta-Pulido, Pasi Hakala arXiv:2407.17562v1 Announce Type: new Abstract: We present a dynamical study of the intermediate polar cataclysmic variable YY Dra based on time-series observations in the $K$ band, where the donor star is known to be the major flux contributor. We covered the $3.97$-h orbital cycle with 44 spectra taken between $2020$ and $2022$ and two epochs of photometry observed in 2021Read More →

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In: arXiv

An Analytic Characterization of the Limb Asymmetry — Transit Time Degeneracy Matthew M. Murphy, Thomas G. Beatty, Daniel Apai arXiv:2407.17564v1 Announce Type: new Abstract: Atmospheres are not spatially homogeneous. This is particularly true for hot, tidally locked exoplanets with large day-to-night temperature variations, which can yield significant differences between the morning and evening terminators — known as limb asymmetry. Current transit observations with the James Webb Space Telescope (JWST) are precise enough to disentangle the separate contributions of these morning and evening limbs to the overall transmission spectrum in certain circumstances. However, the signature of limb asymmetry in a transit light curve is highly degenerateRead More →

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In: arXiv

Periodicity significance testing with null-signal templates: reassessment of PTF’s SMBH binary candidates Jakob Robnik, Adrian E. Bayer, Maria Charisi, Zolt’an Haiman, Allison Lin, Urov{s} Seljak arXiv:2407.17565v1 Announce Type: new Abstract: Periodograms are widely employed for identifying periodicity in time series data, yet they often struggle to accurately quantify the statistical significance of detected periodic signals when the data complexity precludes reliable simulations. We develop a data-driven approach to address this challenge by introducing a null-signal template (NST). The NST is created by carefully randomizing the period of each cycle in the periodogram template, rendering it non-periodic. It has the same frequentist properties as a periodicRead More →

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In: arXiv

Stellar Models are Reliable at Low Metallicity: An Asteroseismic Age for the Ancient Very Metal-Poor Star KIC 8144907 Daniel Huber, Ditte Slumstrup, Marc Hon, Yaguang Li, Victor Aguirre Borsen-Koch, Timothy R. Bedding, Meridith Joyce, J. M. Joel Ong, Aldo Serenelli, Dennis Stello, Travis Berger, Samuel K. Grunblatt, Michael Greklek-McKeon, Teruyuki Hirano, Evan N. Kirby, Marc H. Pinsonneault, Arthur Alencastro Puls, Joel Zinn arXiv:2407.17566v1 Announce Type: new Abstract: Very metal-poor stars ([Fe/H]arXiv:2407.17566v1 Announce Type: new Abstract: Very metal-poor stars ([Fe/H]Read More →

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In: arXiv

A SPectroscopic survey of biased halos In the Reionization Era (ASPIRE): Broad-line AGN at $z=4-5$ revealed by JWST/NIRCam WFSS Xiaojing Lin, Feige Wang, Xiaohui Fan, Zheng Cai, Jaclyn B. Champagne, Fengwu Sun, Marta Volonteri, Jinyi Yang, Joseph F. Hennawi, Eduardo Ba~nados, Aaron Barth, Anna-Christina Eilers, Emanuele Paolo Farina, Weizhe Liu, Xiangyu Jin, Hyunsung D. Jun, Alessandro Lupi, Koki Kakiichi, Chiara Mazzucchelli, Masafusa Onoue, Zhiwei Pan, Elia Pizzati, Sof’ia Rojas-Ruiz, Jan-Torge Schindler, Benny Trakhtenbrot, Yue Shen, Maxime Trebitsch, Ming-Yang Zhuang, Ryan Endsley, Romain A. Meyer, Zihao Li, Mingyu Li, Maria Pudoka, Wei Leong Tee, Yunjing Wu, Haowen Zhang arXiv:2407.17570v1 Announce Type: new Abstract: Low-luminosity AGNs withRead More →

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In: arXiv

Ionospheric effect on the synthetic Epoch of Reionization observations with the SKA1-Low Samit Kumar Pal, Abhirup Datta, Aishrila Mazumder arXiv:2407.17573v1 Announce Type: new Abstract: The redshifted $21$,cm signal of neutral hydrogen can be used as a direct probe of the intergalactic medium during Cosmic Dawn,(CD) and Epoch of Reionization,(EoR). However, detecting this inherently weak signal has numerous challenges. The major ones include accurate foreground removal from low-frequency radio observations and systematics arising from instrumental effects. The Earth’s ionosphere poses a major obstacle at these low radio frequencies. Thus, a systematic study of ionospheric effects on these sensitive low-frequency observations is critical, given that the constructionRead More →

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In: arXiv

Unveiling the structural content of NGC 6357 via kinematics and NIR variability C. Ordenes-Huanca, M. Zoccali, A. Bayo, J. Cuadra, R. Contreras Ramos, A. Rojas-Arriagada arXiv:2407.17577v1 Announce Type: new Abstract: NGC 6357, a star-forming complex at $sim 1.7$ kpc from the Sun, contains giant molecular clouds and three prominent star clusters alongside with HII regions, very massive stars and thousands of young stellar objects in different evolutionary stages. We present a combined infrared kinematic and time domain study of the line of sight towards this region enabled by the VVVX survey. In terms of kinematics, a novel discovery emerges: an asymmetrical distribution in the vectorRead More →