Observations of galactic and extragalactic novae

Valle, M. Della; Izzo, L.

doi:10.1007/s00159-020-0124-6

Cited by 60 publications

(14 citation statements)

References 387 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Using Gaia DR2 observations of old Galactic novae, Schaefer (2018) has suggested that the MMRD relationship should not be used owing to its poor consistency, although Selvelli & Gilmozzi (2019) do find evidence for the MMRD (see also Della Valle & Izzo 2020). Given the general uncertainty regarding the MMRD, we note that a population of faint and fast Galactic novae would further increase the inferred Galactic rate owing to the difficulty in detecting them in magnitude-limited samples.…”

Section: Luminosity Function and Light-curve Shapementioning

confidence: 73%

“…A nova outburst arises from a thermonuclear runaway on the surface of a white dwarf (WD) caused by unstable nuclear burning in a degenerate layer accreted from a companion (Bode & Evans 2008;Starrfield et al 2016;Chomiuk et al 2020;Della Valle & Izzo 2020). As factories for the nucleosynthesis of elements as well as crucial phases in the evolution of binary low-mass stars, the total rate and demographics of novae in the Milky Way are important to constrain the chemical evolution of the Galaxy.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Population of Heavily Reddened, Optically Missed Novae from Palomar Gattini-IR: Constraints on the Galactic Nova Rate

Kasliwal

Hankins

et al. 2021

ApJ

View full text Add to dashboard Cite

The nova rate in the Milky Way remains largely uncertain, despite its vital importance in constraining models of Galactic chemical evolution as well as understanding progenitor channels for Type Ia supernovae. The rate has been previously estimated to be in the range of ≈10-300 yr −1 , either based on extrapolations from a handful of very bright optical novae or the nova rates in nearby galaxies; both methods are subject to debatable assumptions. The total discovery rate of optical novae remains much smaller (≈5-10 yr −1 ) than these estimates, even with the advent of all-sky optical time-domain surveys. Here, we present a systematic sample of 12 spectroscopically confirmed Galactic novae detected in the first 17 months of Palomar Gattini-IR (PGIR), a wide-field near-infrared time-domain survey. Operating in the J band (≈1.2 μm), which is significantly less affected by dust extinction compared to optical bands, the extinction distribution of the PGIR sample is highly skewed to a large extinction values (>50% of events obscured by A V  5 mag). Using recent estimates for the distribution of Galactic mass and dust, we show that the extinction distribution of the PGIR sample is commensurate with dust models. The PGIR extinction distribution is inconsistent with that reported in previous optical searches (null-hypothesis probability <0.01%), suggesting that a large population of highly obscured novae have been systematically missed in previous optical searches. We perform the first quantitative simulation of a 3π time-domain survey to estimate the Galactic nova rate using PGIR, and derive a rate of » -+ 43.7 8.719.5 yr −1 . Our results suggest that all-sky near-infrared timedomain surveys are well poised to uncover the Galactic nova population.

show abstract

Section: Luminosity Function and Light-curve Shapementioning

confidence: 73%

Section: Introductionmentioning

confidence: 99%

A Population of Heavily Reddened, Optically Missed Novae from Palomar Gattini-IR: Constraints on the Galactic Nova Rate

Kasliwal

Hankins

et al. 2021

ApJ

View full text Add to dashboard Cite

show abstract

“…The time s m 2 is the lifetime of the secondary star (the less massive one) which determines the start of the mass accretion on the WD. In our Galaxy, the present time nova rate is estimated to be $ 20-25 nova year À1 (see Della Valle and Izzo 2020). The value of d derived by for the Milky Way is $ 0:01.…”

Section: Novaementioning

confidence: 82%

Modelling the chemical evolution of the Milky Way

Matteuccí

2021

Astron Astrophys Rev

106

View full text Add to dashboard Cite

show abstract

“…Over the years, there have been several efforts to categorise different aspects of the hugely varied range of behaviours exhibited by classical novae in spectroscopic, photometric and polarimetric data. A thorough account of our modern understanding of the phases typically exhibited by classical novae is given in section 4 of Della Valle & Izzo (2020), and so here we give just a brief summary of a relevant subset of this material.…”

Section: Classification Schemes For Classical Novaementioning

confidence: 99%

The onset of jets in classical novae

McLoughlin

Blundell

Lee

et al. 2021

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

We present two further classical novae, V906 Car and V5668 Sgr, which show jets and accretion disc spectral signatures in their H α complexes throughout the first 1000 d following their eruptions. From extensive densely time-sampled spectroscopy, we measure the appearance of the first high-velocity absorption component in V906 Car, and the duration of the commencement of the main H α emission. We constrain the time taken for V5668 Sgr to transition to the nebular phase using [N ii] 6584 Å. We find these timings to be consistent with the jet and accretion disc model for explaining optical spectral line profile changes in classical novae, and discuss the implications of this model for enrichment of the interstellar medium.

show abstract

Observations of galactic and extragalactic novae

Cited by 60 publications

References 387 publications

A Population of Heavily Reddened, Optically Missed Novae from Palomar Gattini-IR: Constraints on the Galactic Nova Rate

A Population of Heavily Reddened, Optically Missed Novae from Palomar Gattini-IR: Constraints on the Galactic Nova Rate

Modelling the chemical evolution of the Milky Way

The onset of jets in classical novae

Contact Info

Product

Resources

About