Risultati di ricerca
1 giorno fa · Supernova. SN 1994D (bright spot on the lower left), a type Ia supernova within its host galaxy, NGC 4526. A supernova ( pl.: supernovae or supernovas) is a powerful and luminous explosion of a star. A supernova occurs during the last evolutionary stages of a massive star, or when a white dwarf is triggered into runaway nuclear fusion.
30 apr 2024 · We present the second and final release of optical spectroscopy of Type Ia Supernovae (SNe Ia) obtained during the first and second phases of the Carnegie Supernova Project (CSP-I and CSP-II). The newly released data consist of 148 spectra of 30 SNe Ia observed in the course of the CSP-I, and 234 spectra of 127 SNe Ia obtained during ...
26 apr 2024 · Recent and future JWST nebular spectra of Type Ia supernovae allow us to significantly improve our interpretation of observed Type Ia supernovae and match them with theoretical explosion models (Kwok et al., 2023a; DerKacy et al., 2023; Blondin et al., 2023; Kwok et al., 2023b).
17 ore fa · The HST Key H 0 Group fitted type Ia supernovae for redshifts between 0.01 and 0.1 to find that H 0 = 71 ± 2 (statistical) ± 6 (systematic) km⋅s −1 ⋅Mpc −1, while Sandage et al. find H 0 = 62.3 ± 1.3 (statistical) ± 5 (systematic) km⋅s −1 ⋅Mpc −1.
25 apr 2024 · We present a JWST MIRI/MRS spectrum (5-27 μ m) of the Type Ia supernova (SN Ia), SN 2021aefx at +415 days past B -band maximum. The spectrum, which was obtained during the iron-dominated nebular phase, has been analyzed in combination with previous JWST observations of SN 2021aefx, to provide the first JWST time series analysis of ...
25 apr 2024 · Type Ia supernova (SN Ia) as a standard candle is an ideal tool to measure cosmic distance and expansion history of the Universe. Here we investigate the SN Ia photometric measurement in the China Space Station Telescope Ultra Deep Field (CSST-UDF) survey, and study the constraint power on the cosmological parameters, such as the ...
4 giorni fa · data. ARICNS. data. Proxima Centauri is a small, low-mass star located 4.2465 light-years (1.3020 pc) away from the Sun in the southern constellation of Centaurus. Its Latin name means the 'nearest [star] of Centaurus'. It was discovered in 1915 by Robert Innes and is the nearest-known star to the Sun. With a quiescent apparent magnitude of 11. ...
