Richard A. Wade
Ph.D. in Astronomy, California Inst. of Technology, 1981
Office: 515 Davey Lab
Mailing Address: 525 Davey Lab, University Park, PA 16802
Phone: (814) 863-6039
FAX: (814) 863-2482
Office Hours: by appointment
The figure on the right compares the brightnesses and spectra of DA white
dwarfs with cool main sequence stars.
- Advanced stages of stellar evolution involving white dwarf stars
and hot subdwarf stars and their interactions in binary systems.
- Observations and models of accretion disks in cataclysmic
variable systems. Click here to see the
evolution of effective temperature for a dwarf nova's accretion disk
(data courtesy John Cannizzo).
Some Specific Projects:
- Orbital periods for binaries containing hot subdwarf stars
and main sequence stars: long or short?
(collaborators: Brad Barlow, Sandra Liss, and others)
- The 23-year light-time orbit of the RR Lyr star, TU Ursae Majoris
(pro-am collaboration); the mass ratio of the TU UMa binary, from
radial velocities (collaborators: C. Bender, K. Todorov, A. Saha, D. Willmarth,
Some Recent Publications:
- Barlow, B., Liss, S.E., Wade, R.A., & Green, E. M. (2013)
``Two new long-period hot subdwarf binaries with dwarf companions."
Astrophys. J., 771, 23 (8 pp)
- Barlow, B., Liss, S.E., Wade, R.A., Ostensen, R.H.,
& van Winckel, H. (2012) ``A radial velocity study of composite-spectra
hot subdwarf stars with the Hobby-Eberly telescope.''
Astrophys. J., 758, 58 (12 pp)
- Orosz, J.A., Welsh, W.F., Carter, J.A., Brugamyer, E.,
Buchhave, L.A., Cochran, W.D., Endl, M., Ford, E.B., MacQueen, P.,
Short, D.RE., Torres, G., Windmiller, G., Agol, E., Barclay, T.,
Caldwell, D.A., Clarke, B.D., Doyle, L.R., Fabrycky, D.C.,
Geary, J.C., Haghihipour, N., Holman, M.J., Ibrahim, K.A.,
Jenkins, J.M., Kinemuchi, K., Li, J., Lissauer, J.J.,
Prsa, A., Ragozzine, D., Shporer, A., Still, M., & Wade, R.A. (2012)
``The Neptune-sized circumbinary planet Kepler-38b.''
Astrophys. J., 758, 87 (14 pp)
- Barlow, B., Wade, R.A., and Liss, S.E. (2012) ``The Roemer delay
and mass ratio of the sdB+dM binary 2M 1938+4603 from
Kepler eclipse timings,''
Astrophys. J., 753, 101 (7 pp)
- Deca, J., Marsh, T.R., Ostensen, R.H., Morales-Rueda, L.,
Copperwheat, C.M., Wade, R.A., Stark, M.A., Maxted, P.F.L.,
Nelemans, G., & Heber, U. (2012)
``PG1018-047: the longest period subdwarf B binary.''
Monthly Notices of the R.A.S., 421, 2798-2808
- Clausen, D., Wade, R.A., Kopparapu, R.K., & O'Shaughnessy, R. (2012)
``Population Synthesis of Hot Subdwarfs: A Parameter Study.''
Astrophys. J., 746, 186 (18 pp)
- Norris, J.M., Wright, J.T., Wade, R.A., Mahadevan, S., & Gettel, S.
(2011) "Non-detection of the Putative Substellar Companion to
Astrophys. J., 743, 88 (6 pp)
- Clausen, D., & Wade, R.A. (2011) ``How to Make a Singleton sdB Star
via Accelerated Stellar Evolution.''
Astrophys. J., 733, L42 (4 pp)
There are at least three Richard Wades with significant
interests in astronomy. "Number 2" is R. Wade in England,
lately involved with the UK STFC.
(When I met him in 1982, at ROE,
we didn't annihilate.) "Number 3" is Richard Peter Wade,
an archaeologist in South Africa (Univ. of Pretoria),
who has been studying "past structures with possible cosmic
references in Sub-Saharan Africa".
Last updated 2016 Mar 23
Web page by Richard Wade (wade(at)astro.psu.edu)
Department of Astronomy and Astrophysics
Penn State University