Zobrazeno 1 - 10
of 52
pro vyhledávání: '"Hoffman, Ian M."'
Autor:
Delaney, Robert D., Sletten, Lucas R., Cich, Matthew J., Estey, Brian, Fabrikant, Maya, Hayes, David, Hoffman, Ian M., Hostetter, James, Langer, Christopher, Moses, Steven A., Perry, Abigail R., Peterson, Timothy A., Schaffer, Andrew, Volin, Curtis, Vittorini, Grahame, Burton, William Cody
We present a scalable method for the control of ion crystals in a grid-based surface electrode Paul trap and characterize it in the context of transport operations that sort and reorder multispecies crystals. By combining co-wiring of control electro
Externí odkaz:
http://arxiv.org/abs/2403.00756
Autor:
Burton, William Cody, Estey, Brian, Hoffman, Ian M., Perry, Abigail R., Volin, Curtis, Price, Gabriel
We report on the first demonstration of transport of a multispecies ion crystal through a junction in an RF Paul trap. The trap is a two-dimensional surface-electrode trap with an X junction and segmented control electrodes to which time-varying volt
Externí odkaz:
http://arxiv.org/abs/2206.11888
Autor:
Hoffman, Ian M., Joyce, Spenser A.
We present the first detection of para-ammonia masers in NGC 7538: multiple epochs of observation of the 14NH3 (J,K) = (10,8) and (9,8) lines. We detect both thermal absorption and nonthermal emission in the (10,8) and (9,8) transitions and the absen
Externí odkaz:
http://arxiv.org/abs/1401.0306
Autor:
Hoffman, Ian M.
We present the first astronomical detection of the 14NH3 (J,K) = (10,6) line: nonthermal emission at several velocities in the Galactic star-forming region NGC 7538. Using the VLA we have imaged the (10,6) and (9,6) ammonia masers at several position
Externí odkaz:
http://arxiv.org/abs/1209.5365
Autor:
Hoffman, Ian M., Kim, Stella Seojin
We present new maser emission from ^{14}NH_3 (9,6) in NGC 7538. Our observations include the known spectral features near v_LSR = -60 km/s and -57 km/s and several more features extending to -46 km/s. In three epochs of observation spanning two month
Externí odkaz:
http://arxiv.org/abs/1110.2238
Autor:
Hoffman, Ian M.
The form and function of a collaborative assessment known as a "Buddy Quiz" is presented. The assessment is conducted in three successive phases over a contiguous 45- to 60-minute class period. A portion of each Quiz is completed in collaboration wit
Externí odkaz:
http://arxiv.org/abs/1107.3864
Autor:
Hoffman, Ian M., Kim, Stella Seojin
We present the first interferometric observations at 18.5 GHz of IRS 1 in NGC 7538. These observations include images of the nonmetastable ^{14}NH_3 (9,6) masers with a synthesized beam of 2 arcseconds and images of the continuum emission with a synt
Externí odkaz:
http://arxiv.org/abs/1105.2339
Publikováno v:
Astrophys.J.654:971-977,2007
Observations of two of the formaldehyde (H2CO) masers (A and D) in Sgr B2 using the VLBA+Y27 (resolution ~0.01") and the VLA (resolution ~9") are presented. The VLBA observations show compact sources (<10 milliarcseconds, <80 AU) with brightness temp
Externí odkaz:
http://arxiv.org/abs/astro-ph/0609800
Publikováno v:
Astrophys.J. 627 (2005) 803-812
Full-polarization MERLIN and VLBA observations of the 1720-MHz maser emission from the OH molecule in the supernova remnant W44 are presented. Zeeman splitting has been directly resolved between right- and left-circularly polarized spectra indicating
Externí odkaz:
http://arxiv.org/abs/astro-ph/0503481
Publikováno v:
Astrophys.J. 620 (2005) 257-273
Full-polarization MERLIN and VLBA observations of the 1720 MHz maser emission from the OH molecule in the supernova remnant W28 are presented. Zeeman splitting (|B| \approx 0.75 mG) has been directly resolved between right- and left-circularly polari
Externí odkaz:
http://arxiv.org/abs/astro-ph/0410577