Zobrazeno 1 - 10
of 584
pro vyhledávání: '"Savin, Daniel A."'
We present revised point-spread functions (PSFs) for the Atmospheric Imaging Assembly (AIA) onboard the Solar Dynamics Observatory (SDO). These PSFs provide a robust estimate of the light diffracted by the meshes holding the entrance and focal plane
Externí odkaz:
http://arxiv.org/abs/2410.08967
Autor:
Fairchild, Alexander J., Hell, Natalie, Beiersdorfer, Peter, Brown, Gregory V., Eckart, Megan E., Hahn, Michael, Savin, Daniel W.
Solar physicists routinely utilize observations of Ar-like Fe IX and Cl-like Fe X emission to study a variety of solar structures. However, unidentified lines exist in the Fe IX and Fe X spectra, greatly impeding the spectroscopic diagnostic potentia
Externí odkaz:
http://arxiv.org/abs/2408.14454
Autor:
Kálosi, Ábel, Grieser, Manfred, Isberner, Leonard W., Kreckel, Holger, Larson, Åsa, Neufeld, David A., Orel, Ann E., Paul, Daniel, Savin, Daniel W., Schippers, Stefan, Schmidt, Viviane C., Wolf, Andreas, Wolfire, Mark G., Novotný, Oldřich
We have experimentally studied dissociative recombination (DR) of electronically and vibrationally relaxed ArH$^+$ in its lowest rotational levels, using an electron--ion merged-beams setup at the Cryogenic Storage Ring. We report measurements for th
Externí odkaz:
http://arxiv.org/abs/2408.06808
Autor:
Corrales, Lia, Gotthelf, Eric V., Gatuzz, Efrain, Kallman, Timothy R., Lee, Julia C., Martins, Michael, Paerels, Frits, Psaradaki, Ioanna, Schippers, Stefan, Savin, Daniel Wolf
Publikováno v:
The Astrophysical Journal 965, 172 (2024)
We present a high-resolution spectral study of Fe L-shell extinction by the diffuse interstellar medium (ISM) in the direction of the X-ray binaries Cygnus X-1 and GX 339-4, using the XMM-Newton reflection grating spectrometer. The majority of inters
Externí odkaz:
http://arxiv.org/abs/2402.06726
Autor:
Bose, Sayak, TenBarge, Jason M., Carter, Troy, Hahn, Michael, Ji, Hantao, Juno, James, Savin, Daniel Wolf, Tripathi, Shreekrishna, Vincena, Stephen
We report the first experimental detection of a reflected Alfv\'en wave from an Alfv\'en-speed gradient under conditions similar to those in coronal holes. The experiments were conducted in the Large Plasma Device at the University of California, Los
Externí odkaz:
http://arxiv.org/abs/2402.06193
Autor:
Bu, Caixia, Morrissey, Liam S., Bostick, Benjamin C., Burger, Matthew H., Bowen, Kyle P., Chillrud, Steven N., Domingue, Deborah L., Dukes, Catherine A., Ebel, Denton S., Harlow, George E., Hillenbrand, Pierre-Michel, Ivanov, Dmitry A., Killen, Rosemary M., Ross, James M., Schury, Daniel, Tucker, Orenthal J., Urbain, Xavier, Zhang, Ruitian, Savin, Daniel W.
We have measured the absolute doubly differential angular sputtering yield for 20 keV Kr+ impacting a polycrystalline Cu slab at an incidence angle of {\theta}i = 45{\deg} relative to the surface normal. Sputtered Cu atoms were captured using collect
Externí odkaz:
http://arxiv.org/abs/2312.12208
One of the demanding frontiers in ultracold science is identifying laser cooling schemes for complex atoms and molecules, out of their vast spectra of internal states. Motivated by a need to expand the set of available ultracold molecules for applica
Externí odkaz:
http://arxiv.org/abs/2311.08381
Autor:
Kálosi, Ábel, Gamer, Lisa, Grieser, Manfred, von Hahn, Robert, Isberner, Leonard W., Jäger, Julia I., Kreckel, Holger, Neufeld, David A., Paul, Daniel, Savin, Daniel W., Schippers, Stefan, Schmidt, Viviane C., Wolf, Andreas, Wolfire, Mark G., Novotný, Oldřich
Observations of OH$^+$ are used to infer the interstellar cosmic ray ionization rate in diffuse atomic clouds, thereby constraining the propagation of cosmic rays through and the shielding by interstellar clouds, as well as the low energy cosmic ray
Externí odkaz:
http://arxiv.org/abs/2309.17015
Publikováno v:
J. Phys. Chem. A 2023, 127, 39, 8194-8199
We report on a cycling scheme for Doppler cooling of trapped OH$^+$ ions using transitions between the electronic ground state $X^3\Sigma^-$ and the first excited triplet state $A^3\Pi$. We have identified relevant transitions for photon cycling and
Externí odkaz:
http://arxiv.org/abs/2308.14729
Autor:
Lavorenti, Federico, Jensen, Elizabeth A., Aizawa, Sae, Califano, Francesco, D'Amore, Mario, Domingue, Deborah, Henri, Pierre, Lindsay, Simon, Raines, Jim M., Savin, Daniel Wolf
Mercury is the closest planet to the Sun, possesses a weak intrinsic magnetic field and has only a very tenuous atmosphere (exosphere). These three conditions result in a direct coupling between the plasma emitted from the Sun (namely the solar wind)
Externí odkaz:
http://arxiv.org/abs/2305.09498