Article
Astronomy & Astrophysics
Shirley Weishi Li, Luke F. Roberts, John F. Beacom
Summary: The detection of neutrinos from a Milky Way core-collapse supernova is crucial, especially during the understudied proto-neutron star cooling phase. With higher statistics expected from present and near-future detectors, detailed neutrino signals during this phase can be measured, providing insights into the properties and formation process of neutron stars.
Article
Astronomy & Astrophysics
Maryam Aghaei Abchouyeh, Maurice H. P. M. van Putten, Lorenzo Amati
Summary: The double neutron star (DNS) merger event GW170817 is the first multimessenger (MM) event with both electromagnetic and gravitational wave observations. The upcoming LIGO-Virgo-KAGRA observational runs O4-5 are expected to detect similar events and unknown gravitational wave signals, which require confirmation in multiple detectors. The duty cycles of data in coincident observations are quantified, and the event rates of astrophysical transients in future EM-GW surveys are investigated. Improving detector yield factors and deploying time-symmetric data analysis methods can significantly enhance the discovery power. The diversity of multimessenger afterglows to DNS mergers may be greater for systems similar to GW170817, but possibly less for systems with substantially different masses like GW190425.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
M. F. Bietenholz, N. Bartel, M. Argo, R. Dua, S. Ryder, A. Soderberg
Summary: The study found that 50% of supernovae within a distance less than 100 Mpc have similar spectral luminosity at peak, but the spectral luminosity values of undetected supernovae are generally about 30 times lower than those detected. Different types of supernovae show variations in spectral luminosity and time to peak, with Type IIn supernovae having the highest spectral luminosity and longest time to peak.
ASTROPHYSICAL JOURNAL
(2021)
Article
Astronomy & Astrophysics
S. Davis, P. J. Pessi, M. Fraser, K. Ertini, L. Martinez, P. Hoeflich, E. Y. Hsiao, G. Folatelli, C. Ashall, M. M. Phillips, J. P. Anderson, M. Bersten, B. Englert, A. Fisher, S. Benetti, A. Bunzel, C. Burns, T. W. Chen, C. Contreras, N. Elias-Rosa, E. Falco, L. Galbany, R. P. Kirshner, S. Kumar, J. Lu, J. D. Lyman, G. H. Marion, S. Mattila, J. Maund, N. Morrell, J. Seron, M. Stritzinger, M. Shahbandeh, M. Sullivan, N. B. Suntzeff, D. R. Young
Summary: SN 2013ai is a fast declining Type II supernova with unique spectral features and light curves. The progenitor of this supernova may have a mass of around 17 solar masses and the explosion resulted in little hydrogen but a large amount of synthesized Ni-56. The density structure and expansion velocities of SN 2013ai are similar to those of the prototypical SN IIb, SN 1993J, indicating it could be a link between different types of supernovae.
ASTROPHYSICAL JOURNAL
(2021)
Article
Optics
Meng Huang, Shiyu Sun, Than S. Saini, Qiang Fu, Lin Xu, Dong Wu, Haonan Ren, Li Shen, Thomas W. Hawkins, John Ballato, Anna C. Peacock
Summary: Raman scattering provides a mechanism to generate or amplify light at wavelengths without available gain, and with recent advancements in high-power fiber lasers operating at 2 mu m wavelengths, there are opportunities to extend Raman systems into the mid-infrared regime for various applications. This study demonstrates Raman emission and amplification using a thulium-doped fiber laser on a highly nonlinear silicon core fiber platform beyond 2 mu m wavelengths. The results suggest that cascaded Raman processes can achieve practical tunable systems with output powers across the 2-5 mu m range by exploiting the large Raman gain and extended mid-infrared transparency of the silicon core fiber.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Astronomy & Astrophysics
Noam Soker
Summary: The author proposes a new model to explain the collision of the ejecta of many core-collapse supernovae with dense compact circumstellar matter days after explosion, and discusses the various effects that this model may produce.
ASTROPHYSICAL JOURNAL
(2021)
Article
Astronomy & Astrophysics
Yu-Ming Chen, Manibrata Sen, Walter Tangarife, Douglas Tuckler, Yue Zhang
Summary: In this work, we use core-collapse supernova to constrain the relic target of sterile-neutrino dark matter (S nu DM). We calculate the effects of a massive scalar mediated neutrino self-interaction on the supernova cooling rate and find that the supernova cooling argument can explore the parameter space of neutrino self-interaction.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
P. J. E. Peebles
Summary: The study reveals that in a region spanning at least 170 Mpc, different types of galaxies show different degrees of alignment with the plane of the de Vaucouleurs Local Supercluster. While the most luminous galaxies are concentrated at low supergalactic latitudes, the most luminous infrared galaxies (LIRGs) show little correlation with this plane.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Eleni Tsaprazi, Jens Jasche, Ariel Goobar, Hiranya Peiris, Igor Andreoni, Michael W. Coughlin, Christoffer U. Fremling, Matthew J. Graham, Mansi Kasliwal, Shri R. Kulkarni, Ashish A. Mahabal, Reed Riddle, Jesper Sollerman, Anastasios Tzanidakis
Summary: The new generation of wide-field time-domain surveys has enabled the study of clustering of supernova host galaxies in the large-scale structure for the first time. The research found that supernovae exhibit high significance clustering and their distribution in the LSS is consistent with that of SDSS galaxies.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Serena A. Cronin, Dyas Utomo, Adam K. Leroy, Erica A. Behrens, Jeremy Chastenet, Tyler Holland-Ashford, Eric W. Koch, Laura A. Lopez, Karin M. Sandstrom, Thomas G. Williams
Summary: The study reveals that core-collapse supernovae tend to lie along the resolved galactic star-forming main sequence, while Type Ia supernovae are more likely to be found in quiescent galaxies or regions. All types of supernovae are more radially concentrated than the UV emission of their host galaxies, with Type II supernovae showing small statistical differences from the near-IR light distribution. This overall structural uniformity is attributed to the tracking relationship between star formation rate surface density and stellar mass surface density within individual galaxies.
ASTROPHYSICAL JOURNAL
(2021)
Article
Astronomy & Astrophysics
Lindsay DeMarchi, R. Margutti, J. Dittman, A. Brunthaler, D. Milisavljevic, Michael F. Bietenholz, C. Stauffer, D. Brethauer, D. Coppejans, K. Auchettl, K. D. Alexander, C. D. Kilpatrick, Joe S. Bright, L. Z. Kelley, Michael C. Stroh, W. Jacobson-Galan
Summary: In this study, extensive multifrequency observations of supernova SN 2004C were conducted using Karl G. Jansky Very Large Array (VLA) and Very Long Baseline Array (VLBA). The temporal evolution of the radio spectral energy distribution was interpreted in the context of synchrotron self-absorbed emission from the explosion's forward shock. The observations and modeling revealed the characteristics of the blastwave and the density profile of the circumstellar medium (CSM).
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Tong Liu, Yun-Feng Wei, Li Xue, Mou-Yuan Sun
Summary: Revisiting numerical simulations of core-collapse supernovae for progenitor stars with different initial explosion energies reveals that lower explosion energy can lead to more efficient fallback accretion, allowing newborn black holes to escape the lower mass gap. Neutron stars are less likely to collapse into black holes in the gap. Future multimessenger observations are expected to delineate the shape of the gap, providing insights into the properties of core-collapse supernovae and their progenitors.
ASTROPHYSICAL JOURNAL
(2021)
Article
Astronomy & Astrophysics
Javier M. Antelis, Marco Cavaglia, Travis Hansen, Manuel D. Morales, Claudia Moreno, Soma Mukherjee, Marek J. Szczepanczk, Michele Zanolin
Summary: This study presents a supervised machine learning method to improve the performance in searching for gravitational wave bursts from core-collapse supernovae. By identifying and discarding noise events, the method reduces the false alarm rate and enhances the statistical significance. The method was tested using strain data from advanced LIGO and simulated CCSNe signals.
Article
Optics
Jaka Mur, Fabian Reuter, Jernej Jan Kocica, Ziga Lokar, Jaka Petelin, Vid Agrez, Claus-Dieter Ohl, Rok Petkovsek
Summary: This paper presents a multi-frame multi-exposure shock wave velocity measurement technique that can measure the propagation speed of shock waves in different directions, verified by a fiber-optic probe hydrophone. The experimental results show that the pressure is higher at closer distances to the plasma center.
Article
Astronomy & Astrophysics
Sajad Abbar, Francesco Capozzi
Summary: Neutrinos in dense neutrino media can undergo fast flavor conversions caused by backward scattering off nuclei at relatively large distances. However, these instabilities are unlikely to cause significant flavor conversions if the population of neutrinos in the backward direction is not large enough.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
P. Molaro, L. Izzo, V D'Odorico, E. Aydi, P. Bonifacio, G. Cescutti, E. J. Harvey, M. Hernanz, P. Selvelli, M. della Valle
Summary: We report on the search for the Be-7 ii isotope in the outbursts of the classical nova V6595 Sgr. The observations reveal the presence of Be-7 ii and other elements in the absorption lines of the outburst spectra. The abundance of Be-7 is about half of the value commonly measured in novae. The observations also classify the nova as ONe type.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
A. Hajela, R. Margutti, J. S. Bright, K. D. Alexander, B. D. Metzger, V Nedora, A. Kathirgamaraju, B. Margalit, D. Radice, C. Guidorzi, E. Berger, A. MacFadyen, D. Giannios, R. Chornock, I Heywood, L. Sironi, O. Gottlieb, D. Coppejans, T. Laskar, Y. Cendes, R. Barniol Duran, T. Eftekhari, W. Fong, A. McDowell, M. Nicholl, X. Xie, J. Zrake, S. Bernuzzi, F. S. Broekgaarden, C. D. Kilpatrick, G. Terreran, V. A. Villar, P. K. Blanchard, S. Gomez, G. Hosseinzadeh, D. J. Matthews, J. C. Rastinejad
Summary: This paper reports on the excess of X-ray emission observed more than 900 days after the GW 170817 binary neutron star merger event, which deviates from the previous models and may be caused by the mildly relativistic shock generated by the merger ejecta.
ASTROPHYSICAL JOURNAL LETTERS
(2022)
Article
Astronomy & Astrophysics
Maurice H. P. M. van Putten, Massimo Della Valle
Summary: By analyzing the event timing of GW170817-GRB170817A, we have discovered candidate emissions from the central engine of GRB170817A. This suggests that the event may originate from the post-merger output epsilon(GW), which has a relatively large energy reservoir and can break the degeneracy in spin-down of a neutron star or black hole remnant according to the Kerr metric. This is of great importance for future observations by LIGO-Virgo-KAGRA.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Luca Izzo, Paolo Molaro, Piercarlo Bonifacio, Gabriele Cescutti, Massimo Della Valle, Pierluigi Selvelli
Summary: CUBES is a new high-resolution spectrograph designed for the Very Large Telescope at the European Southern Observatory. It is primarily aimed at studying and characterizing the nucleosynthesis of beryllium. By directly identifying lithium in classical novae and observing the resonance transition of Be-7 II, CUBES can quantify the amount of Be-7 and Li-7 produced by different types of novae in the Milky Way and its nearby satellite galaxies. Additionally, it can provide insights into the properties of nova ejecta, the evolution of shocks in novae, and their connection to high-energy emission observed in these transients.
EXPERIMENTAL ASTRONOMY
(2023)
Article
Astronomy & Astrophysics
P. Molaro, L. Izzo, P. Selvelli, P. Bonifacio, E. Aydi, G. Cescutti, E. Guido, E. J. Harvey, M. Hernanz, M. Della Valle
Summary: The recurrent nova RS Oph had a new outburst in August 8, 2021, with a visible brightness of V = 4.8 mag. Observations of the outburst detected the presence of Be-7, possibly formed in thermonuclear runaway reactions. The estimated Be-7 yield was N(Be-7)/N(H) = 5.7 x 10(-6), which is among the lowest measured in classical novae. The detection of Be-7 in RS Oph supports the idea that novae are the main source of Li-7 in the Galaxy.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
S. Moran, M. Fraser, R. Kotak, A. Pastorello, S. Benetti, S. J. Brennan, C. P. Gutierrez, E. Kankare, H. Kuncarayakti, S. Mattila, T. M. Reynolds, J. P. Anderson, P. J. Brown, S. Campana, K. C. Chambers, T-W Chen, M. Della Valle, M. Dennefeld, N. Elias-Rosa, L. Galbany, F. J. Galindo-Guil, M. Gromadzki, D. Hiramatsu, C. Inserra, G. Leloudas, T. E. Mueller-Bravo, M. Nicholl, A. Reguitti, M. Shahbandeh, S. J. Smartt, L. Tartaglia, D. R. Young
Summary: We present the five-year follow-up campaign of the long-lived type IIn supernova SN 2017hcc, which was found in a spiral dwarf host of near-solar metallicity. The supernova shows a slow evolution both spectroscopically and photometrically, similar to SN 2010jl. The infrared excess and blueshifts in the Balmer lines suggest the presence of an IR light echo and the condensation of new dust grains at later epochs.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
J. F. Mahlmann, A. Vanthieghem, A. A. Philippov, A. Levinson, E. Nakar, F. Fiuza
Summary: The radiation drag in photon-rich cosmic explosions can induce kinetic instabilities by creating velocity spreads between plasma components. However, large-scale magnetic fields can suppress these instabilities in the deceleration region of the shock transition. Using a radiative transfer code, we study the effects of magnetization on the development of instabilities. We find that the threshold for the onset of microturbulence is approximately 10(-7) for a relativistic, single ion plasma.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
M. Trudu, M. Pilia, L. Nicastro, C. Guidorzi, M. Orlandini, L. Zampieri, V. R. Marthi, F. Ambrosino, A. Possenti, M. Burgay, C. Casentini, I. Mereminskiy, V. Savchenko, E. Palazzi, F. Panessa, A. Ridolfi, F. Verrecchia, M. Anedda, G. Bernardi, M. Bachetti, R. Burenin, A. Burtovoi, P. Casella, M. Fiori, F. Frontera, V. Gajjar, A. Gardini, M. Ge, A. Guijarro-Roman, A. Ghedina, I. Hermelo, S. Jia, C. Li, J. Liao, X. Li, F. Lu, A. Lutovinov, G. Naletto, P. Ochner, A. Papitto, M. Perri, C. Pittori, B. Safonov, A. Semena, I. Strakhov, M. Tavani, A. Ursi, S. L. Xiong, S. N. Zhang, S. Zheltoukhov
Summary: By conducting a multi-wavelength observational campaign, we detected 14 new radio bursts and provided the deepest prompt upper limits in the optical band for FRB 20180916B. Additionally, we performed joint observations of a radio burst using the SRT and Insight-HXMT X-ray detector.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Zi-Pei Zhu, Dong Xu, Johan P. U. Fynbo, Shao-Yu Fu, Jun-Bo Zhang, Xing Liu, Shuai-Qing Jiang, Shuo Xiao, Wei Xie, Yuan-Chuan Zou, He Gao, Dieter Hartmann, Antonio de Ugarte Postigo, David Alexander Kann, Massimo Della Valle, Pall Jakobsson, Tayabba Zafar, Valerio D'Elia, Li-Ping Xin, Jian-Yan Wei, Xing Gao, Jin-Zhong Liu, Tian-Hua Lu, Wei-Hua Lei
Summary: Early optical observations play an important role in understanding gamma-ray bursts and their central engines. However, only a few of the thousands of observed bursts have data on the optical emissions in the first minutes after the onset of the burst. We report on the observation of the afterglow of GRB 190106A in optical bands just 36 seconds after the Swift/BAT trigger, providing valuable insights into the emission process.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
A. J. Levan, G. P. Lamb, B. Schneider, J. Hjorth, T. Zafar, A. de Ugarte Postigo, B. Sargent, S. E. Mullally, L. Izzo, P. D'Avanzo, E. Burns, J. F. Aguei Fernandez, T. Barclay, M. G. Bernardini, K. Bhirombhakdi, M. Bremer, R. Brivio, S. Campana, A. A. Chrimes, V. D'Elia, M. Della Valle, M. De Pasquale, M. Ferro, W. Fong, A. S. Fruchter, J. P. U. Fynbo, N. Gaspari, B. P. Gompertz, D. H. Hartmann, C. L. Hedges, K. E. Heintz, K. Hotokezaka, P. Jakobsson, D. A. Kann, J. A. Kennea, T. Laskar, E. Le Floc'h, D. B. Malesani, A. Melandri, B. D. Metzger, S. R. Oates, E. Pian, S. Piranomonte, G. Pugliese, J. L. Racusin, J. C. Rastinejad, M. E. Ravasio, A. Rossi, A. Saccardi, R. Salvaterra, B. Sbarufatti, R. L. C. Starling, N. R. Tanvir, C. C. Thoene, A. J. van der Horst, S. D. Vergani, D. Watson, K. Wiersema, R. A. M. J. Wijers, Dong Xu
Summary: We present the observations of GRB 221009A afterglow using JWST and HST, which is the brightest GRB ever observed. The mid-IR spectra obtained suggest substantial dust extinction and extinction above the notional Galactic value. The lack of spectral evolution implies that any accompanying supernova is either fainter or bluer than the typical GRB-SN.
ASTROPHYSICAL JOURNAL LETTERS
(2023)
Article
Astronomy & Astrophysics
Dafne Guetta, Yael Hillman, Massimo Della Valle
Summary: The discovery of high energy emission from the recurrent nova RS Ophi-uchi by Fermi-LAT (>100 MeV), H.E.S.S. and MAGIC (>100 GeV) suggests a possible hadronic origin. Based on the observed high energy photon flux, we estimate the expected number of neutrino events that can be detected by present and future neutrino telescopes in different energy ranges. Preliminary estimates indicate that with the next-generation instrument IceCube-Gen2, the expected number of neutrino detections from Galactic novae, albeit with large uncertainty, should not exceed 1 event per decade.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Astronomy & Astrophysics
Justyn R. Maund, Peter A. Hoflich, Iain A. Steele, Yi Yang, Klaas Wiersema, Shiho Kobayashi, Nuria Jordana-Mitjans, Carole Mundell, Andreja Gomboc, Cristiano Guidorzi, Robert J. Smith
Summary: The Liverpool telescope RINGO3 observed AT2018cow, the closest example of fast blue optical transients (FBOTs), and recorded the highest intrinsic polarization for a non-relativistic explosive transient. The polarization showed a chromatic spike at red wavelengths at 5.7 days post-explosion, before rapidly declining. Another polarization "bump" was observed at blue wavelengths at approximately 12 days, indicating an extremely aspherical geometry for a brief period.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Y. Aimuratov, L. M. Becerra, C. L. Bianco, C. Cherubini, M. Della Valle, S. Filippi, Liang Li, R. Moradi, F. Rastegarnia, J. A. Rueda, R. Ruffini, N. Sahakyan, Y. Wang, S. R. Zhang
Summary: This article focuses on the observations of supernovae occurring after long gamma-ray bursts. The binary-driven hypernova model is used to explain the origin and evolution of these supernovae. Through multiwavelength observations and theoretical analysis, several new events related to supernovae and gamma-ray bursts have been discovered.
ASTROPHYSICAL JOURNAL
(2023)
Article
Physics, Fluids & Plasmas
Amir Levinson, Alon Granot, Arno Vanthieghem, Jens Mahlmann
Summary: We summarize recent attempts to understand the role of plasma kinetic effects in radiation mediated shocks. Our research indicates that the coupling between charged leptons and ions in relativistic and multi-ion plasma shocks is driven by transverse magnetic fields or plasma microturbulence. We discuss the implications for shock breakout signals, abundance evolution, and kilonova emission in binary neutron star mergers.
JOURNAL OF PLASMA PHYSICS
(2023)
Article
Astronomy & Astrophysics
M. F. Sousa, J. G. Coelho, J. C. N. de Araujo, C. Guidorzi, J. A. Rueda
Summary: This article characterizes the optical transient expected from double white dwarf mergers and presents simulations of the light curves, spectra, and color evolution of the transient. Based on the estimated merger rate, the absence of detection in current transient surveys is consistent. However, the Legacy Survey of Space and Time of the Vera C. Rubin Observatory is likely to detect several hundred mergers per year, providing a new opportunity to study white dwarfs, neutron stars, and Type Ia supernovae.
ASTROPHYSICAL JOURNAL
(2023)
