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In: arXiv

JWST MIRI detections of H$alpha$ and [O III] and direct metallicity measurement of the $z=10.17$ lensed galaxy MACS0647$-$JD Tiger Yu-Yang Hsiao, Javier ‘Alvarez-M’arquez, Dan Coe, Alejandro Crespo G’omez, Abdurro’uf, Pratika Dayal, Rebecca L. Larson, Arjan Bik, Carmen Blanco-Prieto, Luis Colina, Pablo Guillermo P’erez-Gonz’alez, Luca Costantin, Carlota Prieto-Jim’enez, Angela Adamo, Larry D. Bradley, Christopher J. Conselice, Seiji Fujimoto, Lukas J. Furtak, Taylor A. Hutchison, Bethan L. James, Yolanda Jim’enez-Teja, Intae Jung, Vasily Kokorev, Matilde Mingozzi, Colin Norman, Massimo Ricotti, Jane R. Rigby, Keren Sharon, Eros Vanzella, Brian Welch, Xinfeng Xu, Erik Zackrisson, Adi Zitrin arXiv:2404.16200v1 Announce Type: new Abstract: JWST spectroscopy has revolutionized our understanding ofRead More →

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In: arXiv

JWST NIRSpec High-resolution Spectroscopy of MACS0647-JD at z=10.167: Resolved [OII] Doublet and Electron Density in an Early Galaxy Abdurro’uf, Rebecca L. Larson, Dan Coe, Tiger Yu-Yang Hsiao, Javier ‘Alvarez-M’arquez, Alejandro Crespo G’omez, Angela Adamo, Rachana Bhatawdekar, Arjan Bik, Larry D. Bradley, Christopher J. Conselice, Pratika Dayal, Jose M. Diego, Seiji Fujimoto, Lukas J. Furtak, Taylor A. Hutchison, Intae Jung, Meghana Killi, Vasily Kokorev, Matilde Mingozzi, Colin Norman, Tom Resseguier, Massimo Ricotti, Jane R. Rigby, Eros Vanzella, Brian Welch, Rogier A. Windhorst, Xinfeng Xu, Adi Zitrin arXiv:2404.16201v1 Announce Type: new Abstract: We present JWST/NIRSpec high-resolution spectroscopy G395H/F290LP of MACS0647-JD, a gravitationally lensed galaxy merger at $z=10.167$.Read More →

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In: arXiv

Theoretical Analysis of the RX J0209.6-7427 X-ray Spectrum During Giant Outburst Brent F. West, Peter A. Becker, Georgios Vasilopoulos arXiv:2404.16202v1 Announce Type: new Abstract: We model the spectral formation occurring in the binary X-ray pulsar RX~J0209.6-7427 during the 2019 super-Eddington outburst. Using a theoretical model previously developed by the authors, we are able to produce spectra that closely resemble the phase-averaged X-ray spectra observed using NuSTAR and Insight-HXMT during low and high luminosity states of the outburst, respectively. The theoretical model simulates the accretion of fully ionized gas in a dipole magnetic field, and includes a complete description of the radiation hydrodynamics, matter distribution, andRead More →

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In: arXiv

Young Stellar Objects in NGC 346: A JWST NIRCam/MIRI Imaging Survey Nolan Habel, Conor Nally, Laura Lenkic, Margaret Meixner, Guido De Marchi, Patrick J. Kavanagh, Katja Fahrion, Omnarayani Nayak, Alec S. Hirschauer, Olivia C. Jones, Katia Biazzo, Bernhard R. Brandl, Jeroen Jaspers, Klaus M. Pontoppidan, Massimo Robberto, Ciaran Rogers, Elena Sabbi, B. A. Sargent, David R. Soderblom, Peter Zeidler arXiv:2404.16242v1 Announce Type: new Abstract: We present a JWST imaging survey with NIRCam and MIRI of NGC 346, the brightest star-forming region in the Small Magellanic Cloud (SMC). By combining aperture and point spread function (PSF) photometry of eleven wavelength bands across these two instruments, weRead More →

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In: arXiv

Confronting the Diversity Problem: The Limits of Galaxy Rotation Curves as a tool to Understand Dark Matter Profiles Isabel S. Sands, Philip F. Hopkins, Xuejian Shen, Michael Boylan-Kolchin, James Bullock, Claude-Andre Faucher-Giguere, Francisco J. Mercado, Jorge Moreno, Lina Necib, Xiaowei Ou, Sarah Wellons, Andrew Wetzel arXiv:2404.16247v1 Announce Type: new Abstract: While galaxy rotation curves provide one of the most powerful methods for measuring dark matter profiles in the inner regions of rotation-supported galaxies, at the dwarf scale there are factors that can complicate this analysis. Given the expectation of a universal profile in dark matter-only simulations, the diversity of observed rotation curves has become anRead More →

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In: arXiv

Reconstructing Cosmic History: JWST-Extended Mapping of the Hubble Flow from z$ sim $0 to z$ sim$7.5 with HII Galaxies Ricardo Ch’avez, Roberto Terlevich, Elena Terlevich, Ana Gonz’alez-Mor’an, David Fern’andez-Arenas, Fabio Bresolin, Manolis Plionis, Spyros Basilakos, Ricardo Amor’in, Mario Llerena arXiv:2404.16261v1 Announce Type: new Abstract: Over twenty years ago, Type Ia Supernovae (SNIa) [arXiv:astro-ph/9805201, arXiv:astro-ph/9812133] observations revealed an accelerating Universe expansion, suggesting a significant dark energy presence, often modelled as a cosmological constant, $Lambda$. Despite its pivotal role in cosmology, the standard $Lambda$CDM model remains largely underexplored in the redshift range between distant SNIa and the Cosmic Microwave Background (CMB). This study harnesses the James WebbRead More →

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In: arXiv

New Timing Results of MSPs from NICER Observations Shijie Zheng, Dawei Han, Heng Xu, Kejia Lee, Jianping Yuan, Haoxi Wang, Mingyu Ge, Liang Zhang, Yongye Li, Yitao Yin, Xiang Ma, Yong Chen, Shuangnan Zhang arXiv:2404.16263v1 Announce Type: new Abstract: Millisecond pulsars (MSPs) are known for their long-term stability. Using six years of observations from the Neutron Star Interior Composition Explorer (NICER), we have conducted an in-depth analysis of the X-ray timing results for six MSPs: PSRs B1937+21, B1821$-$24, J0437$-$4715, J0030+0451, J0218+4232, and J2124$-$3358. The timing stability parameter $sigma_z$ has been calculated, revealing remarkable timing precision on the order of $10^{-14}$ for PSRs B1937+21 and J0437$-$4715,Read More →

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In: arXiv

Relativistic tidal separation of binary stars by supermassive black holes Luis A. Manzaneda, C’esar O. Navarrete, Emilio Tejeda arXiv:2404.16270v1 Announce Type: new Abstract: A binary stellar system that ventures too close to a supermassive black hole can become tidally separated. In this article, we investigate the role of relativistic effects in these encounters through 3-body simulations. We use the Hybrid Relativistic-Newtonian Approximation (HRNA), which combines the exact relativistic acceleration from a Schwarzschild black hole with a Newtonian description of the binary’s self-gravity. This method is compared against Newtonian and Post-Newtonian (1PN) simulations. Our findings show good agreement between HRNA and 1PN results, both of whichRead More →

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In: arXiv

Measurement of Interstellar Magnetization by Synchrotron Polarization Variance Ning-Ning Guo (Xiangtan Univ.), Jian-Fu Zhang, Hua-Ping Xiao, Jungyeon Cho, Xue-Juan Yang arXiv:2404.16310v1 Announce Type: new Abstract: Since synchrotron polarization fluctuations are related to the fundamental properties of the magnetic field, we propose the polarization intensity variance to measure the Galactic interstellar medium (ISM) magnetization. We confirm the method’s applicability by comparing it with the polarization angle dispersion and its reliability by measuring the underlying Alfv’enic Mach number of MHD turbulence. With the finding of the power-law relation of $mathcal{A} propto M_{rm A}^{2}$ between polarization intensity variance $mathcal{A}$ and Alfv’enic Mach number $M_{rm A}$, we apply theRead More →

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In: arXiv

The MAGPI Survey: Evolution of radial trends in star formation activity across cosmic time Marcie Mun, Emily Wisnioski, Andrew J. Battisti, J. Trevor Mendel, Sara L. Ellison, Edward N. Taylor, Claudia D. P. Lagos, Katherine E. Harborne, Caroline Foster, Scott M. Croom, Sabine Bellstedt, Stefania Barsanti, Anshu Gupta, Lucas M. Valenzuela, Qian-Hui Chen, Kathryn Grasha, Tamal Mukherjee, Hye-Jin Park, Piyush Sharda, Sarah M. Sweet, Rhea-Silvia Remus, Tayyaba Zafar arXiv:2404.16319v1 Announce Type: new Abstract: Using adaptive optics with the Multi-Unit Spectroscopic Explorer (MUSE) on the Very Large Telescope (VLT), the Middle Ages Galaxy Properties with Integral Field Spectroscopy (MAGPI) survey allows us to study the spatiallyRead More →

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In: arXiv

Magnetically Driven Relativistic Jet in the High-Redshift Blazar OH~471 S. Guo, T. An, Y. Liu, Y. Sotnikova, A. Volvach, T. Mufakharov, L. Chen, L. Cui, A. Wang, Z. Xu, Y. Zhang, W. Xu, Y. A. Kovalev, Y. Y. Kovalev, M. Kharinov, A. Erkenov, T. Semenova, L. Volvach arXiv:2404.16343v1 Announce Type: new Abstract: Context : Understanding the mechanisms that launch and shape powerful relativistic jets from supermassive black holes (SMBHs) in high-redshift active galactic nuclei (AGN) is crucial for probing the co-evolution of SMBHs and galaxies over cosmic time. Aims :We study the high-redshift ($z=3.396$) blazar OH~471 to explore the jet launching mechanism in the earlyRead More →

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In: arXiv

WISDOM Project — XIX. Figures of merit for supermassive black hole mass measurements using molecular gas and/or megamaser kinematics Hengyue Zhang, Martin Bureau, Mark D. Smith, Michele Cappellari, Timothy A. Davis, Pandora Dominiak, Jacob S. Elford, Fu-Heng Liang, Ilaria Ruffa, Thomas G. Williams arXiv:2404.16345v1 Announce Type: new Abstract: The mass ($M_mathrm{BH}$) of a supermassive black hole (SMBH) can be measured using spatially-resolved kinematics of the region where the SMBH dominates gravitationally. The most reliable measurements are those that resolve the smallest physical scales around the SMBHs. We consider here three metrics to compare the physical scales probed by kinematic tracers dominated by rotation: the radiusRead More →

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In: arXiv

The fast X-ray transient EP240315a: a z ~ 5 gamma-ray burst in a Lyman continuum leaking galaxy Andrew J. Levan, Peter G. Jonker, Andrea Saccardi, Daniele Bj{o}rn Malesani, Nial R. Tanvir, Luca Izzo, Kasper E. Heintz, Daniel Mata S’anchez, Jonathan Quirola-V’asquez, Manuel A. P. Torres, Susanna D. Vergani, Steve Schulze, Andrea Rossi, Paolo D’Avanzo, Benjamin Gompertz, Antonio Martin-Carrillo, Antonio de Ugarte Postigo, Benjamin Schneider, Weimin Yuan, Zhixing Ling, Wenjie Zhang, Xuan Mao, Yuan Liu, Hui Sun, Dong Xu, Zipei Zhu, Jos’e Feliciano Ag"u’i Fern’andez, Lorenzo Amati, Franz E. Bauer, Sergio Campana, Francesco Carotenuto, Ashley Chrimes, Joyce N. D. van Dalen, Valerio D’Elia, Massimo Della Valle,Read More →

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In: arXiv

Study of {gamma}-ray Emission from a Compact Radio Galaxy with the Fermi Large Area Telescope Tan-Zheng Wu (BIT), Yu-Wei Yu (BIT), Ying-Ying Gan (BIT), Hai-Ming Zhang (NJU), Jin Zhang (BIT) arXiv:2404.16373v1 Announce Type: new Abstract: The radio galaxy PKS 1007+142 is classified as a compact steep-spectrum source (CSS) and belongs to the class of young Active Galactic Nuclei (AGNs). In this paper, we investigate the $gamma$-ray emission from this CSS by conducting a comprehensive analysis of the 15 yr Fermi Large Area Telescope (Fermi-LAT) observation data. The Fermi-LAT latest Source Catalog, 4FGL-DR4, includes an unassociated $gamma$-ray source, 4FGL J1010.0+1416, located at 0.24{deg} away from theRead More →

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In: arXiv

Model independent approach for calculating galaxy rotation curves for low $S/N$ MaNGA galaxies Sangwoo Park, Arman Shafieloo, Satadru Bag, Mikhail Denissenya, Eric V. Linder, Adarsh Ranjan arXiv:2404.16401v1 Announce Type: new Abstract: Internal kinematics of galaxies, traced through the stellar rotation curve or two dimensional velocity map, carry important information on galactic structure and dark matter. With upcoming surveys, the velocity map may play a key role in the development of kinematic lensing as an astrophysical probe. We improve techniques for extracting velocity information from integral field spectroscopy at low signal-to-noise ($S/N$), without a template, and demonstrate substantial advantages over the standard Penalized PiXel-Fitting method (pPXF)Read More →

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In: arXiv

Soft X-ray prompt emission from a high-redshift gamma-ray burst EP240315a Y. Liu, H. Sun, D. Xu, D. S. Svinkin, J. Delaunay, N. R. Tanvir, H. Gao, C. Zhang, Y. Chen, X. -F. Wu, B. Zhang, W. Yuan, J. An, G. Bruni, D. D. Frederiks, G. Ghirlanda, J. -W. Hu, A. Li, C. -K. Li, J. -D. Li, D. B. Malesani, L. Piro, G. Raman, R. Ricci, E. Troja, S. D. Vergani, Q. -Y. Wu, J. Yang, B. -B. Zhang, Z. -P. Zhu, A. de Ugarte Postigo, A. G. Demin, D. Dobie, Z. Fan, S. -Y. Fu, J. P. U. Fynbo, J. -J. Geng, G. Gianfagna,Read More →

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In: arXiv

Costless correction of chain based nested sampling parameter estimation in gravitational wave data and beyond Metha Prathaban, Will Handley arXiv:2404.16428v1 Announce Type: new Abstract: Nested sampling parameter estimation differs from evidence estimation, in that it incurs an additional source of error. This error affects estimates of parameter means and credible intervals in gravitational wave analyses and beyond, and yet, it is typically not accounted for in standard error estimation methods. In this paper, we present two novel methods to quantify this error more accurately for any chain based nested sampler, using the additional likelihood calls made at runtime in producing independent samples. Using injected signalsRead More →

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In: arXiv

Impacts of Energetic Particles from T Tauri Flares on Inner Protoplanetary Discs Valentin Brunn, Christian Rab, Alexandre Marcowith, Christophe Sauty, Marco Padovani, Chadi Meskini arXiv:2404.16459v1 Announce Type: new Abstract: T Tauri stars are known to be magnetically active stars subject to strong flares observed in X-rays. These flares are likely due to intense magnetic reconnection events during which a part of the stored magnetic energy is converted into kinetic energy of supra-thermal particles. Since T Tauri stars are surrounded by an accretion disc, these particles may influence the disc dynamics and chemistry. This work continues on a previous stationary model, which showed that energetic particlesRead More →

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In: arXiv

TESS Free-floating Planet Candidate Is Likely a Stellar Flare Przemek Mroz arXiv:2404.16480v1 Announce Type: new Abstract: The discovery of a terrestrial-mass free-floating planet candidate in the light curve of the star TIC 107150013 observed by the Transiting Exoplanet Survey Satellite (TESS) has recently been announced. A short-duration (~0.5 day), low-amplitude (~0.06 mag) brightening in the TESS light curve was interpreted as a short-timescale gravitational microlensing event. However, the purported event occurred far from the Galactic center and the Galactic plane (l~ 239 deg, b ~ -5 deg), on a relatively nearby (~3.2 kpc) star, making the microlensing interpretation unlikely. Here, we report the archival photometricRead More →

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In: arXiv

Two-Dimensional Eclipse Mapping of the Hot Jupiter WASP-43b with JWST MIRI/LRS Mark Hammond, Taylor J. Bell, Ryan C. Challener, Neil T. Lewis, Megan Weiner Mansfield, Isaac Malsky, Emily Rauscher, Jacob L. Bean, Ludmila Carone, Jo~ao M. Mendonc{c}a, Lucas Teinturier, Xianyu Tan, Nicolas Crouzet, Laura Kreidberg, Giuseppe Morello, Vivien Parmentier, Jasmina Blecic, Jean-Michel D’esert, Christiane Helling, Pierre-Olivier Lagage, Karan Molaverdikhani, Matthew C. Nixon, Benjamin V. Rackham, Jingxuan Yang arXiv:2404.16488v1 Announce Type: new Abstract: We present eclipse maps of the two-dimensional thermal emission from the dayside of the hot Jupiter WASP-43b, derived from an observation of a phase curve with the JWST MIRI/LRS instrument. The observed eclipseRead More →