Collisions in a Gas-Rich White Dwarf Planetary Debris Disc

Ted von Hippel; Scott J. Kenyon; Jay Farihi; Erik Dennihy; Boris T. Gänsicke; J.J. Hermes; Carl Melis

doi:10.1093/mnras/stab1738

Collisions in a Gas-Rich White Dwarf Planetary Debris Disc

Ted von Hippel, Scott J. Kenyon, Jay Farihi, Erik Dennihy, Boris T. Gänsicke, J.J. Hermes, Carl Melis

Physical Sciences

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Abstract

WD 0145+234 is a white dwarf that is accreting metals from a circumstellar disc of planetary material. It has exhibited a substantial and sustained increase in 3–5 μm flux since 2018. Follow-up Spitzer photometry reveals that emission from the disc had begun to decrease by late 2019. Stochastic brightening events superimposed on the decline in brightness suggest the liberation of dust during collisional evolution of the circumstellar solids. A simple model is used to show that the observations are indeed consistent with ongoing collisions. Rare emission lines from circumstellar gas have been detected at this system, supporting the emerging picture of white dwarf debris discs as sites of collisional gas and dust production.

Original language	American English
Journal	Monthly Notices of the Royal Astronomical Society
Volume	506
DOIs	https://doi.org/10.1093/mnras/stab1738
State	Published - Jun 18 2021

Keywords

circumstellar matter
planetary systems
white dwarfs
stars: individual: WD 0145+234

Disciplines

Stars, Interstellar Medium and the Galaxy

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10.1093/mnras/stab1738License: CC BY

Collisions in a Gas-Rich White Dwarf Planetary Debris DiscFinal published version, 783 KBLicense: CC BY

Cite this

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title = "Collisions in a Gas-Rich White Dwarf Planetary Debris Disc",

abstract = " WD 0145+234 is a white dwarf that is accreting metals from a circumstellar disc of planetary material. It has exhibited a substantial and sustained increase in 3–5 μm flux since 2018. Follow-up Spitzer photometry reveals that emission from the disc had begun to decrease by late 2019. Stochastic brightening events superimposed on the decline in brightness suggest the liberation of dust during collisional evolution of the circumstellar solids. A simple model is used to show that the observations are indeed consistent with ongoing collisions. Rare emission lines from circumstellar gas have been detected at this system, supporting the emerging picture of white dwarf debris discs as sites of collisional gas and dust production.",

keywords = "circumstellar matter, planetary systems, white dwarfs, stars: individual: WD 0145+234",

author = "{von Hippel}, Ted and Kenyon, {Scott J.} and Jay Farihi and Erik Dennihy and G{\"a}nsicke, {Boris T.} and J.J. Hermes and Carl Melis",

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AU - von Hippel, Ted

AU - Kenyon, Scott J.

AU - Farihi, Jay

AU - Dennihy, Erik

AU - Gänsicke, Boris T.

AU - Hermes, J.J.

AU - Melis, Carl

PY - 2021/6/18

Y1 - 2021/6/18

N2 - WD 0145+234 is a white dwarf that is accreting metals from a circumstellar disc of planetary material. It has exhibited a substantial and sustained increase in 3–5 μm flux since 2018. Follow-up Spitzer photometry reveals that emission from the disc had begun to decrease by late 2019. Stochastic brightening events superimposed on the decline in brightness suggest the liberation of dust during collisional evolution of the circumstellar solids. A simple model is used to show that the observations are indeed consistent with ongoing collisions. Rare emission lines from circumstellar gas have been detected at this system, supporting the emerging picture of white dwarf debris discs as sites of collisional gas and dust production.

AB - WD 0145+234 is a white dwarf that is accreting metals from a circumstellar disc of planetary material. It has exhibited a substantial and sustained increase in 3–5 μm flux since 2018. Follow-up Spitzer photometry reveals that emission from the disc had begun to decrease by late 2019. Stochastic brightening events superimposed on the decline in brightness suggest the liberation of dust during collisional evolution of the circumstellar solids. A simple model is used to show that the observations are indeed consistent with ongoing collisions. Rare emission lines from circumstellar gas have been detected at this system, supporting the emerging picture of white dwarf debris discs as sites of collisional gas and dust production.

KW - circumstellar matter

KW - planetary systems

KW - white dwarfs

KW - stars: individual: WD 0145+234

UR - https://commons.erau.edu/publication/2000

U2 - 10.1093/mnras/stab1738

DO - 10.1093/mnras/stab1738

M3 - Article

SN - 1365-2966

VL - 506

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

ER -

Collisions in a Gas-Rich White Dwarf Planetary Debris Disc

Abstract

Keywords

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