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Galaxies, Volume 10, Issue 3

June 2022 - 16 articles

Cover Story: Core-collapse supernovae are the violent deaths of massive stars, and these spectacular events happen only around once per century in our Milky Way. The next exploding nearby star will be one of the most exciting phenomena of the century. In particular, detecting gravitational waves will help us to understand their inner engines. In our work, we study the detectability of predicted gravitational waves with a detector network planned for the end of the 2020s and the early 2030s. We find that, for the most realistic explosion models, we will be able to reach source distances only within our galaxy, while this will not be possible for more-energetic explosions outside of the Milky Way. However, the sky localization will improve greatly with more detectors in the network. View this paper

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Articles (16)

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Article

24 Citations

7,695 Views

36 Pages

Research Facilities for Europe’s Next Generation Gravitational-Wave Detector Einstein Telescope

Sibilla Di Pace,
Valentina Mangano,
Lorenzo Pierini,
Amirsajjad Rezaei,
Jan-Simon Hennig,
Margot Hennig,
Daniela Pascucci,
Annalisa Allocca,
Iara Tosta e Melo and
Vishnu G. Nair
+ 4 authors

Galaxies2022, 10(3), 65;https://doi.org/10.3390/galaxies10030065

28 April 2022

The Einstein Telescope is Europe’s next generation gravitational-wave detector. To develop all necessary technology, four research facilities have emerged across Europe: The Amaldi Research Center (ARC) in Rome (Italy), ETpathfinder in Maastric...

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Editorial

1 Citations

2,391 Views

3 Pages

Global Understanding of Accretion and Ejection around Black Holes

Santanu Mondal

Galaxies2022, 10(3), 64;https://doi.org/10.3390/galaxies10030064

27 April 2022

Accretion and ejection around compact objects, mainly around black holes, both in low mass, and supermassive, is rich and has been studied exhaustively [...]

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Article

30 Citations

11,036 Views

26 Pages

The Current Status and Future Prospects of KAGRA, the Large-Scale Cryogenic Gravitational Wave Telescope Built in the Kamioka Underground

Homare Abe,
Tomotada Akutsu,
Masaki Ando,
Akito Araya,
Naoki Aritomi,
Hideki Asada,
Yoichi Aso,
Sangwook Bae,
Rishabh Bajpai and
Kipp Cannon
+ 133 authors

Galaxies2022, 10(3), 63;https://doi.org/10.3390/galaxies10030063

26 April 2022

KAGRA is a gravitational-wave (GW) detector constructed in Japan with two unique key features: It was constructed underground, and the test-mass mirrors are cooled to cryogenic temperatures. These features are not included in other kilometer-scale de...

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Article

8 Citations

3,052 Views

10 Pages

Understanding High-Energy (UV and X-ray) Emission from AGB Stars—Episodic Accretion in Binary Systems

Raghvendra Sahai,
Jorge Sanz-Forcada,
Martin Guerrero,
Roberto Ortiz and
Carmen Sanchez Contreras

Galaxies2022, 10(3), 62;https://doi.org/10.3390/galaxies10030062

25 April 2022

X-ray surveys of UV-emitting AGB stars show that ∼40% of objects with FUV emission and GALEX FUV/NUV flux ratio Rfuv/nuv ∼> 0.2 (fuvAGB stars) have variable X-ray emission characterized by very high temperatures (Tx∼35–160 M...

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Review

11 Citations

5,426 Views

27 Pages

Radio Galaxies at TeV Energies

Cameron Rulten

Galaxies2022, 10(3), 61;https://doi.org/10.3390/galaxies10030061

22 April 2022

Unlike blazars, radio galaxies have jets that are misaligned relative to our line-of-sight. This misaligned geometry provides us with a unique view of both the jet and super massive black hole. To date, four radio galaxies have been detected at TeV e...

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Article

6 Citations

3,795 Views

12 Pages

Breakthrough Multi-Messenger Astrophysics with the THESEUS Space Mission

Giulia Stratta,
Lorenzo Amati,
Marica Branchesi,
Riccardo Ciolfi,
Nial Tanvir,
Enrico Bozzo,
Diego Götz,
Paul O’Brien and
Andrea Santangelo

Galaxies2022, 10(3), 60;https://doi.org/10.3390/galaxies10030060

21 April 2022

The mission concept THESEUS (Transient High Energy Sky and Early Universe Surveyor) aims at exploiting Gamma-Ray Bursts (GRB) to explore the early Universe, as well as becoming a cornerstone of multi-messenger and time-domain astrophysics. To achieve...

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