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Naslov:Spectroscopic analysis of the strongly lensed SN Encore : constraints on cosmic evolution of Type Ia supernovae
Avtorji:ID Dhawan, S. (Avtor)
ID Pierel, Justin (Avtor)
ID Gu, M. (Avtor)
ID Newman, A. B. (Avtor)
ID Larison, C. (Avtor)
ID Siebert, M. (Avtor)
ID Petrushevska, Tanja (Avtor)
ID Poidevin, F. (Avtor)
ID Jha, S. W. (Avtor)
ID Chen, W. (Avtor)
Datoteke:.pdf SN_Encore_Spectra__MNRAS.pdf (6,45 MB)
MD5: 540D72DF4A87C9B66AF94B6F298F52A1
 
.pdf stae2434.pdf (16,35 MB)
MD5: 128572AAA19738AFA4620323BBFBDBC6
 
URL https://academic.oup.com/mnras/advance-article-pdf/doi/10.1093/mnras/stae2434/60184772/stae2434.pdf
 
Jezik:Angleški jezik
Vrsta gradiva:Neznano
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:UNG - Univerza v Novi Gorici
Opis:Abstract Strong gravitational lensing magnifies the light from a background source, allowing us to study these sources in detail. Here, we study the spectra of a z = 1.95 lensed Type Ia supernova SN Encore for its brightest Image A, taken 39 days apart. We infer the spectral age with template matching using the supernova identification (SNID) software and find the spectra to be at 29.0 ±5.0 and 37.4 ±2.8 rest-frame days post maximum respectively, consistent with separation in the observer frame after accounting for time-dilation. Since SNe Ia measure dark energy properties by providing relative distances between low- and high-z SNe, it is important to test for evolution of spectroscopic properties. Comparing the spectra to composite low-z SN Ia spectra, we find strong evidence for similarity between the local sample and SN Encore. The line velocities of common SN Ia spectral lines, Si II 6355 and Ca II NIR triplet are consistent with the distribution for the low-z sample as well as other lensed SNe Ia, e.g. iPTF16geu (z = 0.409)and SN H0pe (z = 1.78). The consistency between the low-z sample and lensed SNe at high-z suggests no obvious cosmic evolution demonstrating their using as high-z distance indicators, though this needs to be confirmed/refuted via a larger sample. We also find that the spectra of SN Encore match the predictions for explosion models very well. With future large samples of lensed SNe Ia e.g. with the Vera C. Rubin Observatory, spectra at such late phases will be important to distinguish between different explosion scenarios.
Ključne besede:Encore, supernovae
Status publikacije:Objavljeno
Verzija publikacije:Objavljena publikacija
Datum objave:01.01.2024
Leto izida:2024
Št. strani:str. 2939-2947
Številčenje:Vol. 535, issue 4
PID:20.500.12556/RUNG-9444-f7c567c0-2b2f-6726-1a83-297f46d89695 Novo okno
COBISS.SI-ID:213339139 Novo okno
UDK:52
ISSN pri članku:0035-8711
DOI:10.1093/mnras/stae2434 Novo okno
NUK URN:URN:SI:UNG:REP:JDUDGYBX
Datum objave v RUNG:29.10.2024
Število ogledov:936
Število prenosov:3
Metapodatki:XML DC-XML DC-RDF
:
DHAWAN, S., PIEREL, Justin, GU, M., NEWMAN, A. B., LARISON, C., SIEBERT, M., PETRUSHEVSKA, Tanja, POIDEVIN, F., JHA, S. W. in CHEN, W., 2024, Spectroscopic analysis of the strongly lensed SN Encore : constraints on cosmic evolution of Type Ia supernovae. Monthly notices of the royal astronomical society [na spletu]. 2024. Vol. 535, no. 4, p. 2939–2947. [Dostopano 18 april 2025]. DOI 10.1093/mnras/stae2434. Pridobljeno s: https://repozitorij.ung.si/IzpisGradiva.php?lang=slv&id=9444
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Gradivo je del revije

Naslov:Monthly notices of the royal astronomical society
Skrajšan naslov:Mon. Not. R. Astron. Soc.
Založnik:Blackwell Scientific Publications
ISSN:0035-8711
COBISS.SI-ID:25980416 Novo okno

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Licenca:CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
Povezava:http://creativecommons.org/licenses/by/4.0/deed.sl
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