Zobrazeno 1 - 10
of 42
pro vyhledávání: '"Todd C. Hillwig"'
Publikováno v:
The Astronomical Journal, Vol 167, Iss 1, p 30 (2023)
New observations are presented of four evolved objects that display long, multiyear variations in their light curves. These are interpreted as good evidence of their binary nature, with the modulation caused by the barycenter motion of the evolved st
Externí odkaz:
https://doaj.org/article/bdc72f6abe024525a6612c86f67c1dd4
Autor:
Todd C Hillwig, Nicole Reindl, Hannah M Rotter, Adam W Rengstorf, Ulrich Heber, Andreas Irrgang
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 511:2033-2039
As part of a survey to find close binary systems among central stars of planetary nebula, we present two newly discovered binary systems. GALEX J015054.4+310745 is identified as the central star of the possible planetary nebula Fr 2-22. We find it to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c361e9497eff1f954428c0deb9fd742b
https://doi.org/10.1093/mnras/stac226
https://doi.org/10.1093/mnras/stac226
Autor:
David Jones, Todd C. Hillwig, Orsola De Marco, Jonathan Hurowitz, Kayla Martin, Alison F. Crocker, Josh Dey, G. H. Jacoby, Matthias Kronberger
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 506:5223-5246
We present the identification of 34 likely binary central stars (CSs) of planetary nebulae (PNe) from {\it Kepler/K2} data, seven of which show eclipses. Of these, 29 are new discoveries. Two additional CSs with more complicated variability are also
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::972fef360590a3e0e16665c72718e083
https://doi.org/10.1093/mnras/stab2045
https://doi.org/10.1093/mnras/stab2045
Publikováno v:
Monthly Notices of the Royal Astronomical Society: Letters. 498:L114-L118
Eight planetary nebulae have been identified as `born-again', a class of object typified by knotty secondary ejecta having low masses ($\sim$$10^{-4}$ M$_{\odot}$) with nearly no hydrogen. Abell 30, the archetype of the class, also belongs to a small
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e39ea05e22b91dfe682934fe986c39c6
https://doi.org/10.1093/mnrasl/slaa138
https://doi.org/10.1093/mnrasl/slaa138
Autor:
Romano L. M. Corradi, J. Hibbert, J. Munday, Pablo Rodríguez-Gil, Roger Wesson, Henri M. J. Boffin, Jorge García-Rojas, David Jones, Paulina Sowicka, T. Steinmetz, Todd C. Hillwig
We present the discovery and characterisation of the post-common-envelope central star system in the planetary nebula PN G283.7$-$05.1. Deep images taken as part of the POPIPlaN survey indicate that the nebula may possess a bipolar morphology similar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f815f6f40f4e62c405e2bbcd4f4bc852
http://arxiv.org/abs/2007.08960
http://arxiv.org/abs/2007.08960
Autor:
Dieter H. Hartmann, Todd C. Hillwig, James R. Webb, Christopher G. De Pree, Brian W. Murphy, Gary Henson, Robert C. Berrington, Matt A. Wood, Peter Mack, William C. Keel, Javier Licandro, Terry D. Oswalt, Dan Batcheldor, Martha Leake
Publikováno v:
Publications of the Astronomical Society of the Pacific. 133:069201
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b33d9722780020c5328b6937f70b9adb
https://doi.org/10.1088/1538-3873/ac0a96
https://doi.org/10.1088/1538-3873/ac0a96
Autor:
Bruce J. Hrivnak, Todd C. Hillwig, Wenxian Lu, Ronald H. Kaitchuck, Gary Henson, Brian W. Murphy
We present ten years of new photometric monitoring of the light variability of five evolved stars with strong mid-infrared emission from surrounding dust. Three are known carbon-rich proto-planetary nebulae (PPNe) with F$-$G spectral types; the natur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fc5f6cda18e61adb089da7c9bea6fe88
Publikováno v:
The Astrophysical Journal. 901:9
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::110d2dcd190fbb7d13dcd9789fbc6d59
https://doi.org/10.3847/1538-4357/abad8c
https://doi.org/10.3847/1538-4357/abad8c
Autor:
Todd C. Hillwig
Publikováno v:
Galaxies
Volume 6
Issue 3
Galaxies, Vol 6, Iss 3, p 85 (2018)
Volume 6
Issue 3
Galaxies, Vol 6, Iss 3, p 85 (2018)
The increase in discovered close binary central stars of planetary nebulae is leading to a sufficiently large sample to begin to make broader conclusions about the effect of close binary stars on common envelope evolution and planetary nebula formati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::498f53eede3ceec7bcc1473fc579ec73
Autor:
Dimitri Douchin, David J. Frew, Jean-Claude Passy, Michael T. Fitzgerald, George H. Jacoby, Maxwell Moe, D. Harmer, Orsola De Marco, G. Jasniewicz, Todd C. Hillwig
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 448:3132-3155
There is no conclusive explanation of why ∼80 per cent of planetary nebulae (PNe) are non-spherical. In the Binary Hypothesis, a binary interaction is a preferred channel to form a non-spherical PN. A fundamental step to corroborate or disprove the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fcc508bc4314e6b3330049dfc60b77e6
https://doi.org/10.1093/mnras/stu2700
https://doi.org/10.1093/mnras/stu2700