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| Paper: |
Cool Dwarf Scale Heights from the Deep Lens Survey |
| Volume: |
448, 16th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun |
| Page: |
1399 |
| Authors: |
Thorman, P.; Loomba, D.; Boeshaar, P.; Ryan, R. |
| Abstract: |
We have added 1.12 sq. deg. of survey J-band (1.2μm) deep imaging (J = 21.4, 5σ) from Palomar WIRC and 2.5 sq. deg. of targeted FLAMINGOS imaging (median depth J = 20.44, 5σ) to 4 sq. deg. of deep Rz′ imaging from the Deep Lens Survey. Using color models derived from photometry and spectroscopy of known M, L, and T dwarfs, we assign a spectral type probability to each object, and calculate model likelihoods for sech2 and exponential disks of various scale heights by comparing the predicted distance distribution to the estimated object distances. The best-fit exponential scale heights for M9–L2 and L2–L5 dwarfs are ZS = 345 pc and 324 pc, respectively; however, the sech2 models show a possible decrease in the scale height from Z0 = 575 pc to 175 pc between those two groups, which may indicate a weakness in the previously used exponential models. |
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