REVIEW 5 cited by
The physical properties of AM CVn stars: new insights from Gaia DR2
Not yet reviewed by Pith; the record is open.
This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.
SPECIMEN: schema-true, not a live event
T0 review · schema-true
One-sentence machine reading of the paper's core claim.
pith:XXXXXXXX · record.json · timestamp
read the original abstract
AM CVn binaries are hydrogen deficient compact binaries with an orbital period in the 5-65 min range and are predicted to be strong sources of persistent gravitational wave radiation. Using Gaia Data Release 2, we present the parallaxes and proper motions of 41 out of the 56 known systems. Compared to the parallax determined using the HST Fine Guidance Sensor we find that the archetype star, AM CVn, is significantly closer than previously thought. This resolves the high luminosity and mass accretion rate which models had difficulty in explaining. Using Pan-STARRS1 data we determine the absolute magnitude of the AM CVn stars. There is some evidence that donor stars have a higher mass and radius than expected for white dwarfs or that the donors are not white dwarfs. Using the distances to the known AM CVn stars we find strong evidence that a large population of AM CVn stars have still to be discovered. As this value sets the background to the gravitational wave signal of LISA, this is of wide interest. We determine the mass transfer rate for 15 AM CVn stars and find that the majority have a rate significantly greater than expected from standard models. This is further evidence that the donor star has a greater size than expected.
Forward citations
Cited by 5 Pith papers
-
A survey of ultra-compact high-state AM CVn binaries with ZTF and Gaia: New discoveries and observational constraints on Galactic space density
Three new high-state AM CVn binaries are discovered, giving a local space density of about 1 to 3 per 10^8 cubic parsecs and LISA detection estimates near 36% of the Galactic population.
-
Cataclysmic Variables Photometric Periods from TESS
TESS photometry yields coherent periods for 1,362 CVs, including roughly 465–565 first determinations, and confirms the 2–3 h period gap with a median period near 3.68 h.
-
Cataclysmic variables from SRG/eROSITA: new systems from eRASS1
A Random Forest plus Gaia/eROSITA match yields 156 spectroscopically confirmed CVs from eRASS1, spanning subtypes, periods, and luminosities, with the method outperforming several published alternatives.
-
SRG/eROSITA X-ray selected cataclysmic variable candidates observed in SDSS-V DR20
eROSITA-selected SDSS-V DR20 spectroscopy yields 587 cataclysmic variables (274 known), including new nearby systems, AM CVns, and a low-accretion-rate polar.
-
1000 cataclysmic variables identified from DESI spectroscopy
1,029 cataclysmic variables (221 new) were identified from 98.97 million DESI spectra using a CNN trained on SDSS CVs.
Discussion (0). Continue with ORCID to comment.