Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Gary Henson"'
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:
Bruce J. Hrivnak, Matthew T. Bremer, Gary Henson, Wenxian Lu, Peyton J. Grimm, Sean M. Egan, David M. Vogl, T. Hillwig
As part of our continuing study of light variability in proto-planetary nebulae (PPNe), we present the results from a long-term study of nine southern hemisphere objects. We have monitored their light variations over a nine-year interval from 2010-20
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aee5c11405cc21efc2780dc830d4706a
http://arxiv.org/abs/2109.10428
http://arxiv.org/abs/2109.10428
The eclipsing binary epsilon Aur is unique in being a very long-period binary involving an evolved, variable F star and a suspected B main-sequence star enshrouded in an opaque circumstellar disk. The geometrical arrangement is that the disk is viewe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d3fb04cd40f00c4c8b60bf0c675c4f7d
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
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
Autor:
Todd C. Hillwig, Matthew T. Bremer, Hans Van Winckel, Gary Henson, Griet C. Van de Steene, Bruce J. Hrivnak
Publikováno v:
Proceedings of the International Astronomical Union. 14:423-424
We have been intensely monitoring photometric variability in proto-planetary nebulae (PPNe) over the past 25 years and radial velocity variability over the past ten years. Pulsational variability has been obvious, in both the light and velocity, alth
Autor:
Brian W. Murphy, Todd C. Hillwig, Christopher G. De Pree, Terry D. Oswalt, Peter Mack, Martha Leake, Gary Henson, Matt A. Wood, Robert C. Berrington, Dieter H. Hartmann, William C. Keel, Javier Licandro, James R. Webb, Dan Batcheldor
We describe the remote facilities operated by the Southeastern Association for Research in Astronomy (SARA), a consortium of colleges and universities in the US partnered with Lowell Observatory, the Chilean National Telescope Allocation Committee, a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2d6b2fae3e529a8ba8328934d2b80a5c
http://arxiv.org/abs/1608.06245
http://arxiv.org/abs/1608.06245
Publikováno v:
The Astronomical Journal. 156:97
Polarization is a powerful tool for understanding stellar atmospheres and circumstellar environments. Mira and semi-regular variable stars have been observed for decades and some are known to be polarimetrically variable, however, the semi-regular va
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6b1699c13be7191c8c5a3c629b6e5658