A Cultural Resources Survey for a 17.5-acre Tract within the Lake Houston Wilderness Park, Montgomery County, Texas

In January of 2015, Moore Archeological Consulting, Inc., conducted an intensive pedestrian cultural resource investigation of an approximately 17.5-acre tract and an associated water line within the Lake Houston Wilderness Park in southeast Montgomery County, Texas. The objectives of the investigation were to locate and identify cultural materials, sites, or historic properties within the proposed impact area, and to prepare management recommendations regarding any identified resources. The investigations were conducted for Berg-Oliver Associates under Texas Antiquities Permit Number 7156. An intensive pedestrian field survey of the current project area was conducted, and included both surface and subsurface (shovel test) examination. A total of 18 shovel tests were excavated. No cultural materials were recovered from any of the shovel tests. Consequently, no further archeological investigations are recommended. In the event that archeological deposits or features should be encountered during construction, work should cease in the immediate vicinity and the Archeology Division of the Texas Historical Commission contacted for further consultation

Molecular Carbon Chains and Rings in TMC-1

We present mapping results in several rotational transitions of HC3N, C6H, both cyclic and linear C3H2 and C3H, towards the cyanopolyyne peak of the filamentary dense cloud TMC-1 using the IRAM 30m and MPIfR 100m telescopes. The spatial distribution of the cumulene carbon chain propadienylidene H2C3 (hereafter l-C3H2) is found to deviate significantly from the distributions of the cyclic isomer c-C3H2, HC3N, and C6H which in turn look very similar. The cyclic over linear abundance ratio of C3H2 increases by a factor of 3 across the filament, with a value of 28 at the cyanopolyyne peak. This abundance ratio is an order of magnitude larger than the range (3 to 5) we observed in the diffuse interstellar medium. The cyclic over linear abundance ratio of C3H also varies by ~2.5 in TMC-1, reaching a maximum value (13) close to the cyanopolyyne peak. These behaviors might be related to competitive processes between ion-neutral and neutral-neutral reactions for cyclic and linear species.Comment: Accepted for publication in The Astrophysical Journal, part I. 24 pages, including 4 tables, 7 figures, and figure caption