Fermi-LAT Detection of GeV γ-Ray Emission from the Type Ia Supernova Remnant G272.2–3.2

Xiang, Yunchuan; Jiang, Z. J.

doi:10.3847/1538-4357/ac0fe4

Cited by 3 publications

(2 citation statements)

References 47 publications

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“…The SNR is at a distance d = 1.8 +1.4 −0.8 kpc (Greiner et al 1994) or d ∼ 2 − 2.5 kpc (Harrus et al 2001;Kamitsukasa et al 2016). Its age is estimated to be 7,500 +3800 −3300 yr (Leahy et al 2020;Xiang & Jiang 2021). It is located about 110 pc below the Galactic plane.…”

Section: G2722-32mentioning

confidence: 99%

A possible surviving companion of the SN Ia in the Galactic SNR G272.2-3.2

Ruiz‐Lapuente¹,

Hernández²,

Cartier³

et al. 2022

Preprint

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We use the Gaia EDR3 to explore the Galactic supernova remnant SNR G272.2-3.2, produced by the explosion of a Type Ia supernova (SNIa), about 7,500 years ago, to search for a surviving companion. From the abundances in the SNR ejecta, G272.2-3.2 is a normal SNIa. The Gaia parallaxes allow to select the stars located within the estimated distance range of the SNR, and the Gaia proper motions to study their kinematics. From the Gaia EDR3 photometry, we construct the HR diagram of the selected sample, which we compare with the theoretical predictions for the evolution of possible star companions of SNIa. We can discard several proposed types of companions by combining kinematics and photometry. We focus our study on the kinematically most peculiar star, Gaia EDR3 5323900215411075328 (hereafter MV-G272), is a very clear outlier in the motion along the Galactic plane, both as compared with the sample and with the Besançon model of the Galaxy. Its trajectory on the sky locates it at the center of the SNR, 6,000-8,000 years ago, which constitutes a unique characteristic among the 3,082 stars in the sample. Spectra have been obtained allowing a stellar parameters determination and a chemical abundance analysis. The star now appears as an M1-M2 dwarf. Its

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Section: G2722-32mentioning

confidence: 99%

A possible surviving companion of the SN Ia in the Galactic SNR G272.2-3.2

Ruiz‐Lapuente¹,

Hernández²,

Cartier³

et al. 2022

Preprint

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“…In the current Fermi-LAT observation period of approximately 11 years, its particles may not be accelerated to a high-energy band, which makes the E cutoff value of the SED of M31 appear at about 0.03 TeV. On the other hand, if its inner particles are at the stage of the late evolution, this also results in a low E cutoff in the spectrum for the radiative cooling effect (e.g., Brantseg 2013;Cox 1972;Tang et al 2013;Zeng et al 2019;Xiang & Jiang 2021b). Similarly, the particles within M33 with a low E cutoff of approximately 9.64 TeV are likely to be in an early or late evolution stage.…”

Section: Spectral Featurementioning

confidence: 99%

Evaluation of hadronic emission in starburst galaxies and star-forming galaxies

Xiang

Jiang

Tang

2021

Res. Astron. Astrophys.

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In this work, we reanalyzed 11 years of spectral data from the Fermi Large Area Telescope (Fermi-LAT) of currently observed starburst galaxies (SBGs) and star-forming galaxies (SFGs). We used a one-zone model provided by NAIMA and the hadronic origin to explain the GeV observation data of the SBGs and SFGs. We found that a protonic distribution of a power-law form with an exponential cutoff can explain the spectra of most SBGs and SFGs. However, it cannot explain the spectral hardening components of NGC 1068 and NGC 4945 in the GeV energy band. Therefore, we considered the two-zone model to well explain these phenomena. We summarized the features of two model parameters, including the spectral index, cutoff energy, and proton energy budget. Similar to the evolution of supernova remnants (SNRs) in the Milky Way, we estimated the protonic acceleration limitation inside the SBGs to be the order of 102 TeV using the one-zone model; this is close to those of SNRs in the Milky Way.

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A Possible Surviving Companion of the SN Ia in the Galactic SNR G272.2-3.2

Ruiz-Lapuente

Hernández

Cartier

et al. 2023

ApJ

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We use the Gaia EDR3 to explore the Galactic supernova remnant (SNR) G272.2-3.2, produced by the explosion of a Type Ia supernova (SN Ia) about 7500 yr ago, to search for a surviving companion. From the abundances in the SNR ejecta, G272.2-3.2 is a normal SN Ia. The Gaia parallaxes allow us to select the stars located within the estimated distance range of the SNR, and the Gaia proper motions allow us to study their kinematics. From the Gaia EDR3 photometry, we construct the H-R diagram of the selected sample, which we compare with the theoretical predictions for the evolution of possible star companions of SNe Ia. We can discard several proposed types of companions by combining kinematics and photometry. We can also discard hypervelocity stars. We focus our study on the kinematically most peculiar star, Gaia EDR3 5323900215411075328 (hereafter MV-G272), an 8.9σ outlier in proper motion. It is of M1–M2 stellar type. Its trajectory on the sky locates it at the center of the SNR, 6000–8000 yr ago, a unique characteristic among the sample. Spectra allow a stellar parameter determination and a chemical abundance analysis. In conclusion, we have a candidate to be the surviving companion of the SN Ia that resulted in SNR G272.2-3.2. It is supported by its kinematical characteristics and its trajectory within the SNR. This opens the possibility of a single-degenerate scenario for an SN Ia with an M-type dwarf companion.

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Fermi-LAT Detection of GeV γ-Ray Emission from the Type Ia Supernova Remnant G272.2–3.2

Cited by 3 publications

References 47 publications

A possible surviving companion of the SN Ia in the Galactic SNR G272.2-3.2

A possible surviving companion of the SN Ia in the Galactic SNR G272.2-3.2

Evaluation of hadronic emission in starburst galaxies and star-forming galaxies

A Possible Surviving Companion of the SN Ia in the Galactic SNR G272.2-3.2

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