The White Dwarf Luminosity Function from Sloan Digital Sky Survey Imaging Data
- H. Harris, J. Munn, D. Schneider
- Physics
- 29 October 2005
A sample of white dwarfs is selected from the Sloan Digital Sky Survey (SDSS) Data Release 3 using their reduced proper motions, based on improved proper motions from combined SDSS and USNO-B data.…
A 12 MINUTE ORBITAL PERIOD DETACHED WHITE DWARF ECLIPSING BINARY
- Warren R. Brown, M. Kilic, Iac
- Physics
- 12 July 2011
We have discovered a detached pair of white dwarfs (WDs) with a 12.75 minute orbital period and a 1315 km s−1 radial velocity amplitude. We measure the full orbital parameters of the system using its…
THE ELM SURVEY. I. A COMPLETE SAMPLE OF EXTREMELY LOW-MASS WHITE DWARFS
- Warren R. Brown, M. Kilic, C. Prieto, S. Kenyon
- Physics, Geology
- 19 October 2010
We analyze radial velocity observations of the 12 extremely low-mass (ELM), with ⩽0.25 M☉, white dwarfs (WDs) in the MMT Hypervelocity Star Survey. Eleven of the twelve WDs are binaries with orbital…
The Lowest Mass White Dwarf
- M. Kilic, C. Prieto, Warren R. Brown, D. Koester
- Physics, Geology
- 15 November 2006
Extremely low mass white dwarfs are very rare objects likely formed in compact binary systems. We present MMT optical spectroscopy of 42 low-mass white dwarf candidates serendipitously discovered in…
THE ELM SURVEY. VII. ORBITAL PROPERTIES OF LOW-MASS WHITE DWARF BINARIES
- Warren R. Brown, A. Gianninas, M. Kilic, S. Kenyon, C. Prieto
- Physics, Geology
- 14 April 2016
We present the discovery of 15 extremely low-mass ( 5 < log g < 7 ?> ) white dwarf (WD) candidates, 9 of which are in ultra-compact double-degenerate binaries. Our targeted extremely low-mass Survey…
The Ages of the Thin Disk, Thick Disk, and the Halo from Nearby White Dwarfs
- M. Kilic, J. Munn, S. DeGennaro
- Physics, Geology
- 22 February 2017
We present a detailed analysis of the white dwarf luminosity functions derived from the local 40 pc sample and the deep proper motion catalog of Munn et al. Many previous studies have ignored the…
The Dust Cloud around the White Dwarf G29-38
- W. Reach, M. Kuchner, D. Winget
- Physics
- 11 November 2005
We present new observations of the white dwarf G29-38 with the camera (4.5 and 8 μm), photometer (24 μm), and spectrograph (5.5-14 μm) of the Spitzer Space Telescope. This star has an exceptionally…
The New Class of Dusty DAZ White Dwarfs
- T. von Hippel, M. Kuchner, M. Kilic, F. Mullally, W. Reach
- Physics, Geology
- 18 March 2007
Our mid-infrared survey of 124 white dwarfs with the Spitzer Space Telescope and the IRAC imager has revealed an infrared excess associated with the white dwarf WD 2115-560 naturally explained by…
THE ELM SURVEY. V. MERGING MASSIVE WHITE DWARF BINARIES
- Warren R. Brown, M. Kilic, Iac
- Physics, Geology
- 15 April 2013
We present the discovery of 17 low-mass white dwarfs (WDs) in short-period (P ⩽ 1 day) binaries. Our sample includes four objects with remarkable log g ≃ 5 surface gravities and orbital solutions…
The Future Is Now: The Formation of Single Low-Mass White Dwarfs in the Solar Neighborhood
- M. Kilic, K. Stanek, M. Pinsonneault
- Physics, Geology
- 21 June 2007
Low-mass helium-core white dwarfs (M < 0.45 M☉) can be produced from interacting binary systems, and traditionally all of them have been attributed to this channel. However, a low-mass white dwarf…
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