Table:
|  | Number of awards | Weighted average contractual life | Aggregate fair value |
| --- | --- | --- | --- |
| RCUs |  |  |  |
| Outstanding as of January 1, 2018 | 67,475 | 1.38 | 1,429 |
| Granted during the year | 24,608 | — | 576 |
| Vested during the year | (16,999) | — | (410) |
| Outstanding as of December 31, 2018 | 75,084 | 1.25 | 1,595 |
| Granted during the year | 26,308 | — | 605 |
| Vested during the year | (24,925) | — | (410) |
| Outstanding as of December 31, 2019 | 76,467 | 1.26 | 1,790 |
| PCUs |  |  |  |
| Outstanding as of January 1, 2018 | 67,475 | 1.38 | 1,429 |
| Granted during the year | 24,608 | — | 576 |
| Vested during the year | (16,999) | — | (410) |
| Outstanding as of December 31, 2018 | 75,084 | 1.25 | 1,595 |
| Granted during the year | 26,308 | — | 605 |
| Vested during the year | (24,925) | — | (410) |
| Outstanding as of December 31, 2019 | 76,467 | 1.26 | 1,790 |
Paragraphs:
GasLog Ltd. and its Subsidiaries
Notes to the consolidated financial statements (Continued)
For the years ended December 31, 2017, 2018 and 2019
(All amounts expressed in thousands of U.S. Dollars, except share and per share data)
22. Share-Based Compensation (Continued)
Movement in RCUs and PCUs
The summary of RCUs and PCUs is presented below:
The total expense recognized in respect of share-based compensation for the year ended December 31, 2019 was $5,107 (December 31, 2018: $5,216 and December 31, 2017: $4,565). The total accrued cash distribution as of December 31, 2019 is $1,176 (December 31, 2018: $1,265).
Question:
What are the two components of the share based compensation?
Answer: RCUs, PCUs