Early Spectral Evolution of Classical Novae: Consistent Evidence for Multiple Distinct Outflows

  title={Early Spectral Evolution of Classical Novae: Consistent Evidence for Multiple Distinct Outflows},
  author={Elias Aydi and Laura Chomiuk and Luca Izzo and E J Harvey and J. Leahy-McGregor and Jay Strader and David A H Buckley and Kirill V. Sokolovsky and Adam Kawash and Christopher S. Kochanek and Justin D. Linford and Brian D. Metzger and Koji Mukai and Marina Orio and Benjamin. J. Shappee and Laura Shishkovsky and Elad Steinberg and Samuel J. Swihart and J. L. Sokoloski and Frederick M. Walter and Patrick A. Woudt},
  journal={arXiv: High Energy Astrophysical Phenomena},
The physical mechanism driving mass ejection during a nova eruption is still poorly understood. Possibilities include ejection in a single ballistic event, a common envelope interaction, a continuous wind, or some combination of these processes. Here we present a study of 12 Galactic novae, for which we have pre-maximum high-resolution spectroscopy. All 12 novae show the same spectral evolution. Before optical peak, they show a slow P Cygni component. After peak a fast component quickly arises… Expand
Surveying the X-Ray Behavior of Novae as They Emit γ-Rays
The detection of GeV γ-ray emission from Galactic novae by the Fermi-Large Area Telescope has become routine since 2010, and is generally associated with shocks internal to the nova ejecta. TheseExpand
AT 2019qyl in NGC 300: Internal Collisions in the Early Outflow from a Very Fast Nova in a Symbiotic Binary
  • J. Jencson, Jennifer E. Andrews, +39 authors Nathan Smith
  • Physics
  • The Astrophysical Journal
  • 2021
Nova eruptions, thermonuclear explosions on the surfaces of white dwarfs (WDs), are now recognized to be among the most common shock-powered astrophysical transients. We present the early discoveryExpand
Chandra observations of nova KT Eridani in outburst
We analyze here four observations of nova KT Eri (Nova Eri 2009) done with the Chandra High-Resolution Camera Spectrometer (HRC-S) and the Low-Energy Transmission Grating (LETG) in 2010, from dayExpand
Nova LMC 2009a as observed with XMM–Newton, compared with other novae
We examine four high resolution reflection grating spectrometers (RGS) spectra of the February 2009 outburst of the luminous recurrent nova LMC 2009a. They were very complex and rich in intricateExpand
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We present two further classical novae, V906 Car and V5668 Sgr, that show jets and accretion disc spectral signatures in their H-alpha complexes throughout the first 1000 days following theirExpand
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The classical nova YZ Reticuli was discovered in July 2020. Shortly after this we commenced a sustained, highly time-sampled coverage of its subsequent rapid evolution with time-resolved spectroscopyExpand


Internal shocks from variable outflows in classical novae
We present one-dimensional hydrodynamical simulations including radiative losses, of internal shocks in the outflows from classical novae, to explore the role of shocks in powering multi-wavelengthExpand
The decline and fall of classical novae
We address questions concerning the evolution of classical nova systems through outburst and the time scale for the return to their preoutburst state. Observations indicate that evolution on a purelyExpand
Direct evidence for shock-powered optical emission in a nova
Classical novae are thermonuclear explosions that occur on the surfaces of white dwarf stars in interacting binary systems 1 . It has long been thought that the luminosity of classical novae isExpand
Novae ejecta as colliding shells
Following on our initial absorption-line analysis of fifteen novae spectra we present additional evidence for the existence of two distinct components of novae ejecta having different origins. AsExpand
A high-resolution spectroscopic survey of post-outburst novae reveals short-lived heavy element absorption systems in a majority of novae near maximum light, having expansion velocities of 400-1000Expand
Shaping of nova remnants by binary motion
We present the results of 2.5D hydrodynamic calculations of the effects of the underlying binary system on shaping the ejecta in a classical nova outburst. In the model, the outburst takes place inExpand
A nova outburst powered by shocks
Classical novae are runaway thermonuclear burning events on the surfaces of accreting white dwarfs in close binary star systems, sometimes appearing as new naked-eye sources in the night sky1. TheExpand
Binary orbits as the driver of γ-ray emission and mass ejection in classical novae
High-resolution radio imaging of the γ-ray-emitting nova V959 Mon finds that its ejecta were shaped by the motion of the binary system: some gas was expelled rapidly along the poles as a wind from the white dwarf, while denser material drifted out along the equatorial plane, propelled by orbital motion. Expand
Available data for novae show that the X-ray and visible spectral regions correlate with each other as they evolve. Large differences in ionization exist simultaneously in the two wavelength regimes,Expand
Non-thermal radio emission from colliding flows in classical nova V1723 Aql
The importance of shocks in nova explosions has been highlighted by Fermi's discovery of \gamma-ray producing novae. Over three years of multi-band VLA radio observations of the 2010 nova V1723 AqlExpand