Type Iax Supernovae

Jha, Saurabh W.

doi:10.1007/978-3-319-20794-0_42-1

Cited by 5 publications

(5 citation statements)

References 107 publications

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“…Ia-TDEs are expected to appear spectroscopically similar to SNe Ia, but with lower luminosity. This is reminiscent of SNe Iax, a class of SN characterized by low photospheric velocities of ∼ 2000 − 8000 km s −1 during peak, hot photospheres, and low peak luminosities between −14.2 M V −18.9 (Foley et al 2013;Jha 2017;Lee & Shen 2022). One leading model to explain SNe Iax is a pure-deflagration explosion of a CO-WD, where the explosion is triggered by accretion of helium onto the WD, which does not necessarily fully disrupt the star (Jha 2017).…”

Section: Comparison To Sne Iamentioning

confidence: 97%

“…This is reminiscent of SNe Iax, a class of SN characterized by low photospheric velocities of ∼ 2000 − 8000 km s −1 during peak, hot photospheres, and low peak luminosities between −14.2 M V −18.9 (Foley et al 2013;Jha 2017;Lee & Shen 2022). One leading model to explain SNe Iax is a pure-deflagration explosion of a CO-WD, where the explosion is triggered by accretion of helium onto the WD, which does not necessarily fully disrupt the star (Jha 2017). It is likely that if Ia-TDEs are detected, they might appear classified as SNe Iax, as is the case for the nuclear Ia-TDE candidates SN 2021jun, and SN 2020lrt.…”

Section: Comparison To Sne Iamentioning

confidence: 97%

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The Search for Thermonuclear Transients from the Tidal Disruption of a White Dwarf by an Intermediate Mass Black Hole

Gómez¹,

Gezari²

2023

Preprint

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The close encounter of a white dwarf (WD) with a black hole (BH) could result in the tidal disruption of the WD. During this encounter, the WD can undergo a thermonuclear explosion due to its tidal compression, resulting in an optical transient similar to a Type Ia supernova (SN Ia), hereafter a Ia-TDE. Nevertheless, this will only be physically observable if the BH is 10 5 M . Finding a Ia-TDE would therefore imply the discovery of an intermediate mass black hole (IMBH) 10 5 M . Here, we search the entire Zwicky Transient Facility (ZTF) alert stream for the elusive Ia-TDEs. We restrict our search to nuclear transients in dwarf galaxies, the likely sites for IMBHs, and find a total of six possible nuclear Ia-TDE candidates. We find SN 2020lrt to be the most likely Ia-TDE candidate, thanks to its strong resemblance to light curve and spectroscopic models of Ia-TDEs. We measure the stellar masses of the dwarf galaxies hosting these transients to be 10 9 M ; if confirmed to harbor BHs, these would prove the existence of IMBHs in some of the lowest-mass galaxies known. Additionally, we searched for off-nuclear Ia-TDEs, but were unable to find more robust candidates in the outskirts of galaxies than in their nuclei. This supports the hypothesis that the nuclear Ia-TDEs candidates are WDs tidally compressed by IMBHs in the cores of galaxies, as opposed to a class of transient that can happen anywhere in a galaxy. We have laid the groundwork to systematically search for Ia-TDE candidates in existing and future time-domain surveys. Rapid characterization of their nature will result in not only the confirmation of a Ia-TDE, but also the unambiguous discovery of bonafide IMBHs.

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Section: Comparison To Sne Iamentioning

confidence: 97%

Section: Comparison To Sne Iamentioning

confidence: 97%

The Search for Thermonuclear Transients from the Tidal Disruption of a White Dwarf by an Intermediate Mass Black Hole

Gómez¹,

Gezari²

2023

Preprint

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“…It has been suggested that SNe Iax could arise from weak deflagration explosions of Chandrasekhar-mass WDs in which the stars are not fully disrupted. Such events would leave behind a bound WD remnant that has been shock heated significantly (Jordan et al 2012a;Foley et al 2013;Kromer et al 2013a;Fink et al 2014;Jha 2017). If binary systems are destroyed by the SN explosion in this model, such partly burnt WD remnants would be ejected with a high velocity and a peculiar atmosphere due to enrichment with heavy elements from the SN explosion, causing some unusual observational features (Shen et al 2017;Zhang et al 2019).…”

Section: Searches For Surviving Wd Remnantsmentioning

confidence: 97%

“…These SNe Ia are usually referred to as "normal SNe Ia," and they have long been used as standardizable candles for measuring cosmological distances (Leibundgut 2001(Leibundgut , 2008Goobar & Leibundgut 2011). However, an increasing number of SNe Ia have been observed that do not follow the Phillips relation (see Figure 1), and they are diverse in their observational characteristics, such as light curve shape, peak luminosity and spectral features (Benetti et al 2005;Blondin et al 2012;Jha 2017). For these reasons, SNe Ia have been classified into different subclasses diverging from normal events, which include 1991T-likes (Filippenko et al 1992a;Phillips et al 1992), 1991bg-likes (Filippenko et al 1992b;Leibundgut et al 1993Li et al 2003;Foley et al 2013), 2002es-likes (Ganeshalingam et al 2012), calcium (Ca)-rich objects (i.e., SN 2005E-like; Perets et al 2010;Kasliwal et al 2012), super-Chandrasekhar objects (i.e., SN 2003fg-likes; Howell et al 2006;Hicken et al 2007), SNe Ia-CSM (Hamuy et al 2003) and fast decliners (Taubenberger 2017).…”

Section: Diversity Of Sne Iamentioning

confidence: 99%

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Type Ia Supernova Explosions in Binary Systems: A Review

Liu

Roepke

Han

2023

Res. Astron. Astrophys.

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Type Ia supernovae (SNe Ia) play a key role in the fields of astrophysics and cosmology. It is widely accepted that SNe Ia arise from thermonuclear explosions of white dwarfs (WDs) in binary systems. However, there is no consensus on the fundamental aspects of the nature of SN Ia progenitors and their actual explosion mechanism. This fundamentally flaws our understanding of these important astrophysical objects. In this review, we outline the diversity of SNe Ia and the proposed progenitor models and explosion mechanisms. We discuss the recent theoretical and observational progress in addressing the SN Ia progenitor and explosion mechanism in terms of the observables at various stages of the explosion, including rates and delay times, pre-explosion companion stars, ejecta-companion interaction, early excess emission, early radio/X-ray emission from circumstellar material (CSM) interaction, surviving companion stars, late-time spectra and photometry, polarization signals, and supernova remnant properties, etc. Despite the efforts from both the theoretical and observational side, the questions of how the WDs reach an explosive state and what progenitor systems are more likely to produce SNe Ia remain open. No single published model is able to consistently explain all observational features and the full diversity of SNe Ia. This may indicate that either a new progenitor paradigm or the improvement of current models is needed if all SNe Ia arise from the same origin. An alternative scenario is that different progenitor channels and explosion mechanisms contribute to SNe Ia. In the next decade, the ongoing campaigns with the James Webb Space Telescope (JWST), Gaia and the Zwicky Transient Facility (ZTF), and upcoming extensive projects with the Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST) and the Square Kilometre Array (SKA) will allow us to conduct not only studies of individual SNe Ia in unprecedented detail but also systematic investigations for different subclasses of SNe Ia. This will advance theory and observations of SNe Ia sufficiently far to gain a deeper understanding of their origin and explosion mechanism.

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Type Ia Supernova Cosmology

Leibundgut¹,

Sullivan²

2018

Supernovae

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The primary agent for Type Ia supernova cosmology is the uniformity of their appearance. We present the current status, achievements and uncertainties. The Hubble constant and the expansion history of the universe are key measurements provided by Type Ia supernovae. They were also instrumental in showing time dilation, which is an direct observational signature of an expansion. Connections to explosion physics are made in the context of potential improvements of the quality of Type Ia supernovae as distance indicators. The coming years will see large efforts to use Type Ia supernovae to characterise dark energy.

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Type Iax Supernovae

Cited by 5 publications

References 107 publications

The Search for Thermonuclear Transients from the Tidal Disruption of a White Dwarf by an Intermediate Mass Black Hole

The Search for Thermonuclear Transients from the Tidal Disruption of a White Dwarf by an Intermediate Mass Black Hole

Type Ia Supernova Explosions in Binary Systems: A Review

Type Ia Supernova Cosmology

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