Dr Simone Scaringi's Outputs (13)

SWIFT J0503.7-2819: A nearly synchronous intermediate polar below the period gap? (2022)
Journal Article
Rawat, N., Pandey, J., Joshi, A., Scaringi, S., & Yadava, U. (2022). SWIFT J0503.7-2819: A nearly synchronous intermediate polar below the period gap?. Monthly Notices of the Royal Astronomical Society, 517(2), 1667-1677. https://doi.org/10.1093/mnras/stac2723

Based on the X-ray observations from XMM-Newton and Swift, and optical observations from Transiting Exoplanet Survey Satellite (TESS) and AAVSO, we present temporal and spectral properties of probable intermediate polar SWIFT J0503.7-2819. The X-ray... Read More about SWIFT J0503.7-2819: A nearly synchronous intermediate polar below the period gap?.

Spectroscopic follow-up of a subset of the Gaia/IPHAS catalogue of Hα-excess sources (2022)
Journal Article
Fratta, M., Scaringi, S., Monguió, M., Pala, A., Drew, J., Knigge, C., …Gandhi, P. (2022). Spectroscopic follow-up of a subset of the Gaia/IPHAS catalogue of Hα-excess sources. Monthly Notices of the Royal Astronomical Society, 518(3), 3301-3311. https://doi.org/10.1093/mnras/stac3216

State-of-the-art techniques to identify Hα emission-line sources in narrow-band photometric surveys consist of searching for  Hα excess with reference to nearby objects in the sky (position-based selection). However, while this approach usually yield... Read More about Spectroscopic follow-up of a subset of the Gaia/IPHAS catalogue of Hα-excess sources.

XGAPS: a sub-arcsec cross-match of galactic plane surveys (2022)
Journal Article
Scaringi, S., Monguió, M., Knigge, C., Fratta, M., Gänsicke, B., Groot, P., …Toloza, O. (2022). XGAPS: a sub-arcsec cross-match of galactic plane surveys. Monthly Notices of the Royal Astronomical Society, 518(2), 3137-3146. https://doi.org/10.1093/mnras/stac3353

We present a sub-arcsec cross-match of Gaia Data Release 3 (DR3) against the INT Galactic Plane Surveys (IGAPS) and the United Kingdom Infrared Deep Sky Survey (UKIDSS). The resulting cross-match of Galactic Plane Surveys (XGAPS) provides additional... Read More about XGAPS: a sub-arcsec cross-match of galactic plane surveys.

Outer disc edge: properties of low-frequency aperiodic variability in ultracompact interacting binaries (2022)
Journal Article
Veresvarska, M., & Scaringi, S. (2022). Outer disc edge: properties of low-frequency aperiodic variability in ultracompact interacting binaries. Monthly Notices of the Royal Astronomical Society, 518(4), 5576-5589. https://doi.org/10.1093/mnras/stac3470

Flickering, and more specifically aperiodic broad-band variability, is an important phenomenon used in understanding the geometry and dynamics of accretion flows. Although the inner regions of accretion flows are known to generate variability on rela... Read More about Outer disc edge: properties of low-frequency aperiodic variability in ultracompact interacting binaries.

A Magnetic Valve at L1 Revealed in TESS Photometry of the Asynchronous Polar BY Cam (2022)
Journal Article
Mason, P. A., Littlefield, C., Monroy, L. C., Morales, J. F., Hakala, P., Garnavich, P., …Scaringi, S. (2022). A Magnetic Valve at L1 Revealed in TESS Photometry of the Asynchronous Polar BY Cam. Astrophysical Journal, 938(2), https://doi.org/10.3847/1538-4357/ac91cf

We present TESS photometry of the asynchronous polar BY Cam, which undergoes a beat cycle between the 199.384 min white dwarf (WD) spin period and the 201.244 min orbital period. This results in changes in the flow of matter onto the WD. The TESS lig... Read More about A Magnetic Valve at L1 Revealed in TESS Photometry of the Asynchronous Polar BY Cam.

Locating the flickering source in polars (2022)
Journal Article
Iłkiewicz, K., Scaringi, S., Littlefield, C., & Mason, P. A. (2022). Locating the flickering source in polars. Monthly Notices of the Royal Astronomical Society, 516(4), https://doi.org/10.1093/mnras/stac2597

Flickering is a fast variability observed in all accreting systems. It has been shown that in most cataclysmic variables flickering originates in the accretion disc. However, in polars the strong magnetic field of the white dwarf prevents the formati... Read More about Locating the flickering source in polars.

Characterization of the eclipsing post-common-envelope binary TIC 60040774 (2022)
Journal Article
Priyatikanto, R., Knigge, C., Scaringi, S., Brink, J., & Buckley, D. (2022). Characterization of the eclipsing post-common-envelope binary TIC 60040774. Monthly Notices of the Royal Astronomical Society, 516(1), 1183-1192. https://doi.org/10.1093/mnras/stac2197

Binaries with a white dwarf primary and a main sequence secondary can be used to test our understanding of both single and binary star evolution. A small fraction of such systems experienced a common-envelope phase from which they emerged with a rela... Read More about Characterization of the eclipsing post-common-envelope binary TIC 60040774.

Hitting a New Low: The Unique 28 hr Cessation of Accretion in the TESS Light Curve of YY Dra (DO Dra) (2022)
Journal Article
Hill, K. L., Littlefield, C., Garnavich, P., Scaringi, S., Szkody, P., Mason, P. A., …Covington, A. E. (2022). Hitting a New Low: The Unique 28 hr Cessation of Accretion in the TESS Light Curve of YY Dra (DO Dra). Astronomical Journal, 163(6), Article 246. https://doi.org/10.3847/1538-3881/ac5a51

We present the Transiting Exoplanet Surveying Satellite light curve of the intermediate polar YY Draconis (YY Dra, also known as DO Dra). The power spectrum indicates that while there is stream-fed accretion for most of the observational period, ther... Read More about Hitting a New Low: The Unique 28 hr Cessation of Accretion in the TESS Light Curve of YY Dra (DO Dra).

Localized thermonuclear bursts from accreting magnetic white dwarfs (2022)
Journal Article
Scaringi, S., Groot, P., Knigge, C., Bird, A., Breedt, E., Buckley, D., …Timmes, F. (2022). Localized thermonuclear bursts from accreting magnetic white dwarfs. Nature, 604(7906), 447-450. https://doi.org/10.1038/s41586-022-04495-6

Nova explosions are caused by global thermonuclear runaways triggered in the surface layers of accreting white dwarfs1,2,3. It has been predicted4,5,6 that localized thermonuclear bursts on white dwarfs can also take place, similar to type-I X-ray bu... Read More about Localized thermonuclear bursts from accreting magnetic white dwarfs.

Triggering micronovae through magnetically confined accretion flows in accreting white dwarfs (2022)
Journal Article
Scaringi, S., Groot, P., Knigge, C., Lasota, J., de Martino, D., Cavecchi, Y., …Camisassa, M. (2022). Triggering micronovae through magnetically confined accretion flows in accreting white dwarfs. Monthly Notices of the Royal Astronomical Society: Letters, 514(1), L11-L15. https://doi.org/10.1093/mnrasl/slac042

Rapid bursts at optical wavelengths have been reported for several accreting white dwarfs, where the optical luminosity can increase by up to a factor 30 in less than an hour fading on timescales of several hours, and where the energy release can rea... Read More about Triggering micronovae through magnetically confined accretion flows in accreting white dwarfs.

Discovery and analysis of three magnetic hot subdwarf stars: evidence for merger-induced magnetic fields (2022)
Journal Article
Pelisoli, I., Dorsch, M., Heber, U., Gänsicke, B., Geier, S., Kupfer, T., …Schaffenroth, V. (2022). Discovery and analysis of three magnetic hot subdwarf stars: evidence for merger-induced magnetic fields. Monthly Notices of the Royal Astronomical Society, 515(2), 2496-2510. https://doi.org/10.1093/mnras/stac1069

Magnetic fields can play an important role in stellar evolution. Among white dwarfs, the most common stellar remnant, the fraction of magnetic systems is more than 20 per cent. The origin of magnetic fields in white dwarfs, which show strengths rangi... Read More about Discovery and analysis of three magnetic hot subdwarf stars: evidence for merger-induced magnetic fields.

A persistent ultraviolet outflow from an accreting neutron star binary transient (2022)
Journal Article
Castro Segura, N., Knigge, C., Long, K., Altamirano, D., Armas Padilla, M., Bailyn, C., …Wiseman, P. (2022). A persistent ultraviolet outflow from an accreting neutron star binary transient. Nature, 603(7899), 52-57. https://doi.org/10.1038/s41586-021-04324-2

All disc-accreting astrophysical objects produce powerful disc winds. In compact binaries containing neutron stars or black holes, accretion often takes place during violent outbursts. The main disc wind signatures during these eruptions are blue-shi... Read More about A persistent ultraviolet outflow from an accreting neutron star binary transient.

Rapid Bursts of Magnetically Gated Accretion in the Intermediate Polar V1025 Cen (2022)
Journal Article
Littlefield, C., Lasota, J., Hameury, J., Scaringi, S., Garnavich, P., Szkody, P., …Leichty, M. (2022). Rapid Bursts of Magnetically Gated Accretion in the Intermediate Polar V1025 Cen. Astrophysical Journal Letters, 924(1), https://doi.org/10.3847/2041-8213/ac4262

Magnetically gated accretion has emerged as a proposed mechanism for producing extremely short, repetitive bursts of accretion onto magnetized white dwarfs in intermediate polars (IPs), but this phenomenon has not been detected previously in a confir... Read More about Rapid Bursts of Magnetically Gated Accretion in the Intermediate Polar V1025 Cen.