Zobrazeno 1 - 10
of 416
pro vyhledávání: '"Federman S"'
Autor:
Nazari, P., Rocha, W. R. M., Rubinstein, A. E., Slavicinska, K., Rachid, M. G., van Dishoeck, E. F., Megeath, S. T., Gutermuth, R., Tyagi, H., Brunken, N., Narang, M., Manoj, P., Watson, D. M., Evans II, N. J., Federman, S., Page, J. Muzerolle, Anglada, G., Beuther, H., Klaassen, P., Looney, L. W., Osorio, M., Stanke, T., Yang, Y. -L.
Publikováno v:
A&A 686, A71 (2024)
Nitrogen-bearing complex organic molecules have been commonly detected in the gas phase but not yet in interstellar ices. This has led to the long-standing question of whether these molecules form in the gas phase or in ices. $\textit{James Webb}$ Sp
Externí odkaz:
http://arxiv.org/abs/2401.07901
We present the results of a sensitive search for high-velocity gas in interstellar absorption lines associated with the Cygnus Loop supernova remnant (SNR). We examine high-resolution, high signal-to-noise ratio optical spectra of six stars in the Cy
Externí odkaz:
http://arxiv.org/abs/2401.00960
Autor:
Ritchey, Adam M., Jenkins, Edward B., Shull, J. Michael, Savage, Blair D., Federman, S. R., Lambert, David L.
Publikováno v:
ApJ, 952:57 (26pp), 2023
In this investigation, we present an analysis of the metallicity distribution that pertains to neutral gas in the local Galactic interstellar medium (ISM). We derive relative ISM metallicities for a sample of 84 sight lines probing diffuse atomic and
Externí odkaz:
http://arxiv.org/abs/2301.09743
Publikováno v:
ApJ, 948:139 (32pp), 2023
We present a comprehensive examination of interstellar P and Cl abundances based on an analysis of archival spectra acquired with the Space Telescope Imaging Spectrograph of the Hubble Space Telescope and the Far Ultraviolet Spectroscopic Explorer. C
Externí odkaz:
http://arxiv.org/abs/2301.09727
Autor:
Xu, Zhongxing, Federman, S. R., Jackson, William M., Ng, Cheuk-Yiu, Wang, Lee-Ping, Crabtree, Kyle N.
Photodissociation is one of the main destruction pathways for dicarbon (C$_{2}$) in astronomical environments such as diffuse interstellar clouds, yet the accuracy of modern astrochemical models is limited by a lack of accurate photodissociation cros
Externí odkaz:
http://arxiv.org/abs/2206.03540
Autor:
Hakalla, R., Niu, M. L., Field, R. W., Heays, A. N., Salumbides, E. J., Stark, G., Lyons, J. R., Eidelsberg, M., Lemaire, J. L., Federman, S. R., de Oliveira, N., Ubachs, W.
The high-resolution B$^1\Sigma^+$ - A$^1\Pi$ (0, 0) and (0, 3) emission bands of the less-abundant $^{13}$C$^{17}$O isotopologue have been investigated by Fourier-transform spectroscopy in the visible region using a Bruker IFS 125HR spectrometer at a
Externí odkaz:
http://arxiv.org/abs/2204.11466
Autor:
Federman, S. R., Rice, Johnathan S., Ritchey, A. M., Kim, Hwihyun, Lacy, John H., Goldsmith, Paul F., Flagey, Nicolas, Mace, Gregory N., Lambert, David L.
Publikováno v:
ApJ, 914, 59 (2021)
We study four lines of sight that probe the transition from diffuse molecular gas to molecular cloud material in Taurus. Measurements of atomic and molecular absorption are used to infer the distribution of species and the physical conditions toward
Externí odkaz:
http://arxiv.org/abs/2106.12748
We present lifetime measurements using beam-foil techniques for radiative transitions from the 3$p^4$($^1S$)4$s$ $^2S_{1/2}$, 3$p^4$($^3P$)5$s$ $^2P_{1/2,3/2}$, and 3$p^4$($^3P$)3$d$ $^2F_{5/2}$ levels in Cl I and the corresponding results of the osc
Externí odkaz:
http://arxiv.org/abs/1910.05803
We present results of our Chandra/ACIS observations of the field centered on the fast, runaway O star AE Aur and its bow shock. Previous XMM-Newton observations revealed an X-ray "blob" near the IR arc tracing the bow shock, possibly a nonthermal sou
Externí odkaz:
http://arxiv.org/abs/1909.01424
Autor:
Xu, Zhongxing, Luo, Nan, Federman, S. R., Jackson, William M., Ng, Cheuk-Yiu, Wang, Lee-Ping, Crabtree, Kyle N.
Photodissociation by ultraviolet radiation is the key destruction pathway for CS in photon-dominated regions, such as diffuse clouds. However, the large uncertainties of photodissociation cross sections and rates of CS, resulting from a lack of both
Externí odkaz:
http://arxiv.org/abs/1907.10189