The Peculiar Multiwavelength Evolution Of V1535 Sco

Linford, Justin D.; Chomiuk, Laura; Nelson, Thomas; Finzell, Thomas; Walter, Frederick M.; Sokoloski, J. L.; Mukai, K.; Mioduszewski, Amy J.; Horst, A. J. van der; Weston, Jennifer; Rupen, M. P.

doi:10.3847/1538-4357/aa7512

Cited by 23 publications

(24 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With maximum magnitudes of 7.6 and 8.2 mag, t 2 = 14 and 6 days and extinctions of 3.72 and 2.81 mag, we estimated distances of (2.9 ± 0.7) and (7.3 ± 1.7) kpc for V679 Car and V1535 Sco, respectively. Note that our distance estimate of V1535 Sco is compatible with the Galactic Center distance of ∼ 8.5 kpc, which was also suggested by Linford et al (2017).…”

Section: Gamma-ray Nova Candidatessupporting

confidence: 89%

“…Hard, absorbed X-rays and synchrotron radio emission were detected at the early phase of the outburst indicating that the nova is produced by a white dwarf embedded within the wind of a red-giant companion (Walter 2015;Nelson et al 2015). Linford et al (2017) show that the measured X-ray emission indicates the presence of strong shocks during the first two weeks of the nova's evolution, which is expected for a nova ejecta expanding into a thick wind from a giant companion. A rebrightening in X-rays after ∼ 50 days indicates the existence of a second shock possibly produced in collisions between multiple outflows within the ejecta.…”

Section: Gamma-ray Nova Candidatesmentioning

confidence: 67%

See 1 more Smart Citation

Search for gamma-ray emission from Galactic novae with the Fermi -LAT

Franckowiak

Jean

Wood

et al. 2018

A&A

View full text Add to dashboard Cite

Context. A number of novae have been found to emit high-energy gamma rays (> 100 MeV). However, the origin of this emission is not yet understood. We report on the search for gamma-ray emission from 75 optically-detected Galactic novae in the first 7.4 years of operation of the Fermi Large Area Telescope using the Pass 8 data set. Aims. We compile an optical nova catalog including light curves from various resources and estimate the optical peak time and optical peak magnitude in order to search for gamma-ray emission to test if all novae are gamma-ray emitters. Methods. We repeat the analysis of the six novae previously identified as gamma-ray sources and develop a unified analysis strategy which we then apply to all novae in our catalog. We search for emission in a 15-day time window in two-day steps ranging from 20 days before to 20 days after the optical peak time. We perform a population study with Monte Carlo simulations to set constraints on the properties of the gamma-ray emission of novae. Results. Two new novae candidates have been found at ∼ 2σ global significance. Although these two novae candidates were not detected at a significant level individually, taking them together with the other non-detected novae, we found a sub-threshold nova population with a cumulative 3σ significance. We report the measured gamma-ray flux for detected sources and flux upper limits for novae without significant detection. Our results can be reproduced by several gamma-ray emissivity models (e.g. a power-law distribution with a slope of 2), while a constant emissivity model (i.e. assuming novae are standard candles) can be rejected.

show abstract

Section: Gamma-ray Nova Candidatessupporting

confidence: 89%

Section: Gamma-ray Nova Candidatesmentioning

confidence: 67%

Search for gamma-ray emission from Galactic novae with the Fermi -LAT

Franckowiak

Jean

Wood

et al. 2018

A&A

View full text Add to dashboard Cite

show abstract

“…Synchrotrondominated light curves of radio transients often show an optically-thick rise, where the flux increases as τ drops, and an optically-thin decline, usually interpreted as a decline in the density of material being shocked and/or a decline in the shock velocity (e.g., Weiler et al 2002). V445 Pup is unusual in showing multiple peaks in its light curve (although see the embedded nova V1535 Sco for a similar albeit less dramatic case; Linford et al 2017).…”

Section: Understanding the Synchrotron-dominated Light Curve Of V445 Pupmentioning

confidence: 99%

Radio light curves and imaging of the helium nova V445 Puppis reveal seven years of synchrotron emission

Nyamai

Chomiuk

Ribeiro

et al. 2020

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

V445 Puppis is the only helium nova observed to date; its eruption in late 2000 showed high velocities up to 8500 km s−1, and a remarkable bipolar morphology cinched by an equatorial dust disc. Here we present multi-frequency radio observations of V445 Pup obtained with the Very Large Array (VLA) spanning 1.5–43.3 GHz, and between 2001 January and 2008 March (days ∼89–2700 after eruption). The radio light curve is dominated by synchrotron emission over these seven years, and shows four distinct radio flares. Resolved radio images obtained in the VLA’s A configuration show that the synchrotron emission hugs the equatorial disc, and comparisons to near-IR images of the nova clearly demonstrate that it is the densest ejecta—not the fastest ejecta—that are the sites of the synchrotron emission in V445 Pup. The data are consistent with a model where the synchrotron emission is produced by a wind from the white dwarf impacting the dense equatorial disc, resulting in shocks and particle acceleration. The individual synchrotron flares may be associated with density enhancements in the equatorial disc and/or velocity variations in the wind from the white dwarf. This overall scenario is similar to a common picture of shock production in hydrogen-rich classical novae, but V445 Pup is remarkable in that these shocks persist for almost a decade, much longer than the weeks or months for which shocks are typically observed in classical novae.

show abstract

“…dThe multiwavelength evolution of this system during its outburst in 2015 is discussed in Linford et al ().…”

Section: X‐ray Emission Of Symbiotic Variable Starsmentioning

confidence: 99%

“…The nova manifested strong hard X‐ray emission early in its evolution; later, the softer component also appeared in the spectra. Multiwavelength evolution of the system during this outburst is discussed in Linford et al ().…”

Section: X‐ray Emission Of Symbiotic Variable Starsmentioning

confidence: 99%

New online database of symbiotic variables: Symbiotics in X‐rays

2019

View full text Add to dashboard Cite

Symbiotic variable stars belong to an interesting class of interacting binary systems.Since the beginning of this century, the systematic search for these objects has begun, and such surveys have led to discoveries of many new objects and dozens of candidates in the Milky Way and the Local Group. As the latest catalogue of symbiotic binaries is almost two decades old, we decided to prepare a new, online database of the galactic and extragalactic symbiotic systems. These objects are also known for their X-ray emission. For the purpose of this work, we have prepared a census of symbiotic binaries and their properties based on observations obtained by X-ray satellites in the previous decades. As our review has shown, the X-ray emission seems to be a common feature of symbiotic systems, preferentially detected from nearby sources.

show abstract

The Peculiar Multiwavelength Evolution Of V1535 Sco

Cited by 23 publications

References 49 publications

Search for gamma-ray emission from Galactic novae with the Fermi -LAT

Search for gamma-ray emission from Galactic novae with the Fermi -LAT

Radio light curves and imaging of the helium nova V445 Puppis reveal seven years of synchrotron emission

New online database of symbiotic variables: Symbiotics in X‐rays

Contact Info

Product

Resources

About