Search Results - "Wahlgren, G. M"

HD 65949: Rosetta stone or red herring by Cowley, C. R., Hubrig, S., Palmeri, P., Quinet, P., Biémont, É., Wahlgren, G. M., Schütz, O., González, J. F.

“…HD 65949 is a late B star with exceptionally strong Hg ii λ3984, but it is not a typical HgMn star. The Re ii spectrum is of extraordinary strength. Abundances…”
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High-resolution spectroscopy of the hot Am star HR 3383 by Wahlgren, G M, Nielsen, K E, Leckrone, D S

“…ABSTRACT We present the spectrum analysis of the hot Am star HR 3383 (A1 Vm). Hubble Space Telescope STIS and Nordic Optical Telescope SOFIN data are modelled…”
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In-orbit Performance of the Near-infrared Spectrograph NIRSpec on the James Webb Space Telescope by Böker, T., Beck, T. L., Birkmann, S. M., Giardino, G., Keyes, C., Kumari, N., Muzerolle, J., Rawle, T., Zeidler, P., Abul-Huda, Y., de Oliveira, C. Alves, Arribas, S., Bechtold, K., Bhatawdekar, R., Bonaventura, N., Bunker, A. J., Cameron, A. J., Carniani, S., Charlot, S., Curti, M., Espinoza, N., Ferruit, P., Franx, M., Jakobsen, P., Karakla, D., López-Caniego, M., Lützgendorf, N., Maiolino, R., Manjavacas, E., Marston, A. P., Moseley, S. H., Ogle, P., Perna, M., Peña-Guerrero, M., Pirzkal, N., Plesha, R., Proffitt, C. R., Rauscher, B. J., Rix, H.-W., del Pino, B. Rodríguez, Rustamkulov, Z., Sabbi, E., Sing, D. K., Sirianni, M., Plate, M. te, Úbeda, L., Wahlgren, G. M., Wislowski, E., Wu, R., Willott, Chris J.

“…Abstract The Near-Infrared Spectrograph (NIRSpec) is one of the four focal plane instruments on the James Webb Space Telescope. In this paper, we summarize the…”
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Accurate Wavelengths, Oscillator Strengths and Hyperfine Structure in Selected Praseodymium Lines of Astrophysical Interest by Ivarsson, S, Litzén, U, Wahlgren, G M

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A STUDY OF THE ELEMENTS COPPER THROUGH URANIUM IN SIRIUS A: CONTRIBUTIONS FROM STIS AND GROUND-BASED SPECTRA by Cowley, C. R., Ayres, T. R., Castelli, F., Gulliver, A. F., Monier, R., Wahlgren, G. M.

“…ABSTRACT We determine abundances or upper limits for all of the 55 stable elements from copper to uranium for the A1 Vm star Sirius. The purpose of the study…”
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The Long-Term Spectroscopic Misadventures of AG Dra with a Nod Toward V407 Cyg: Degenerates Behaving Badly by Shore S. N., Genovali K., Wahlgren G. M.

“…We present some results of an ongoing study of the long-term spectroscopic variations of AG Dra, a prototypical eruptive symbiotic system. We discuss the…”
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The Bismuth Abundance in the HgMn Stars χ Lupi and HR 7775 and Improved Atomic Data for Selected Transitions of Bi I, Bi II, and Bi III by Wahlgren, G. M, Brage, T, Brandt, J. C, Fleming, J, Johansson, S, Leckrone, D. S, Proffitt, C. R, Reader, J, Sansonetti, C. J

“…High-resolution spectra of the chemically peculiar HgMn stars chi Lupiand HR 7775, obtained with the Hubble Space Telescope/Goddard HighResolution…”
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s-Process Elements in the M Supergiant α Ori by Lundqvist, M., Wahlgren, G.M.

“…We present new results on a study of the weak s-process elemental abundances in the M supergiant a Ori (M2Iab). We have conducted the abundance analysis…”
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Wavelengths, energy levels and hyperfine structure constants in Ho ii by Gurell, J, Wahlgren, G M, Nave, G, Wyart, J-F

“…We recorded spectra of Ho ii emitted by hollow-cathode lamps, using the ultraviolet Fourier transform spectrometer (FTS) at Lund Observatory and the 2-m FTS at…”
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In-orbit Performance of the Near-Infrared Spectrograph NIRSpec on the James Webb Space Telescope by Böker, T, Beck, T. L, Birkmann, S. M, Giardino, G, Keyes, C, Kumari, N, Muzerolle, J, Rawle, T, Zeidler, P, Abul-Huda, Y, de Oliveira, C. Alves, Arribas, S, Bechtold, K, Bhatawdekar, R, Bonaventura, N, Bunker, A. J, Cameron, A. J, Carniani, S, Charlot, S, Curti, M, Espinoza, N, Ferruit, P, Franx, M, Jakobsen, P, Karakla, D, López-Caniego, M, Lützgendorf, N, Maiolino, R, Manjavacas, E, Marston, A. P, Moseley, S. H, Ogle, P, Perna, M, Peña-Guerrero, M, Pirzkal, N, Plesha, R, Proffitt, C. R, Rauscher, B. J, Rix, H. -W, del Pino, B. Rodríguez, Rustamkulov, Z, Sabbi, E, Sing, D. K, Sirianni, M, Plate, M. te, Úbeda, L, Wahlgren, G. M, Wislowski, E, Wu, R, Willott, C. J

“…The Near-Infrared Spectrograph (NIRSpec) is one of the four focal plane instruments on the James Webb Space Telescope. In this paper, we summarize the in-orbit…”
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Lifetime Measurements for Ground Term Transitions in Ta II, W II, and Re II by Henderson, M, Irving, R. E, Matulioniene, R, Curtis, L. J, Ellis, D. G, Wahlgren, G. M, Brage, T

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The FERRUM Project: New f-value Data for Fe II and Astrophysical Applications by Johansson, S, Derkatch, A, Donnelly, M P, Hartman, H, Hibbert, A, Karlsson, H, Kock, M, Li, Z S, Leckrone, D S, Litzén, U, Lundberg, H, Mannervik, S, Norlin, L-O, Nilsson, H, Pickering, J, Raassen, T, Rostohar, D, Royen, P, Schmitt, A, Johanning, M, Sikström, C M, Smith, P L, Svanberg, S, Wahlgren, G M

“…We present the FERRUM Project, an international collaboration aiming at a production and evaluation of oscillator strengths (transition probabilities) of…”
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Gamma-Ray Emission Concurrent with the Nova in the Symbiotic Binary V407 Cygni by Abdo, A A, Ackermann, M, Ajello, M, Atwood, W B, Baldini, L, Ballet, J, Barbiellini, G, Bastieri, D, Bechtol, K, Bellazzini, R, Berenji, B, Blandford, R D, Bloom, E D, Bonamente, E, Borgland, A W, Bouvier, A, Brandt, T J, Bregeon, J, Brez, A, Brigida, M, Bruel, P, Buehler, R, Burnett, T H, Buson, S, Caliandro, G A, Cameron, R A, Caraveo, P A, Carrigan, S, Casandjian, J M, Cecchi, C, Celik, O, Charles, E, Chaty, S, Chekhtman, A, Cheung, C C, Chiang, J, Ciprini, S, Claus, R, Cohen-Tanugi, J, Conrad, J, Corbel, S, Corbet, R, DeCesar, M E, den Hartog, P R, Dermer, C D, de Palma, F, Digel, S W, Donato, D, do Couto e Silva, E, Drell, P S, Dubois, R, Dubus, G, Dumora, D, Favuzzi, C, Fegan, S J, Ferrara, E C, Fortin, P, Frailis, M, Fuhrmann, L, Fukazawa, Y, Funk, S, Fusco, P, Gargano, F, Gasparrini, D, Gehrels, N, Germani, S, Giglietto, N, Giordano, F, Giroletti, M, Glanzman, T, Godfrey, G, Grenier, I A, Grondin, M-H, Grove, J E, Guiriec, S, Hadasch, D, Harding, A K, Hayashida, M, Hays, E, Healey, S E, Hill, A B, Horan, D, Hughes, R E, Itoh, R, Jean, P, Jóhannesson, G, Johnson, A S, Johnson, R P, Johnson, T J, Johnson, W N, Kamae, T, Katagiri, H, Kataoka, J, Kerr, M, Knödlseder, J, Koerding, E, Kuss, M, Lande, J, Latronico, L, Lee, S-H

“…Novae are thermonuclear explosions on a white dwarf surface fueled by mass accreted from a companion star. Current physical models posit that shocked expanding…”
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CRIRES-POP: a library of high resolution spectra from 1 to 5 microns II. Data reduction and the spectrum of the K giant 10 Leo by Nicholls, C. P, Lebzelter, T, Smette, A, Wolff, B, Hartman, H, Käufl, H. -U, Przybilla, N, Ramsay, S, Uttenthaler, S, Wahlgren, G. M, Bagnulo, S, Hussain, G. A. J, Nieva, M. -F, Seeman, U, Seifahrt, A

“…A&A 598, A79 (2017) Context. High resolution stellar spectral atlases are valuable resources to astronomy. They are rare in the $1 - 5\,\mu$m region for…”
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The long-term spectroscopic misadventures of AG Dra with a nod toward V407 Cyg: Degenerates behaving badly by Shore, S. N, Genovali, K, Wahlgren, G. M

“…We present some results of an ongoing study of the long-term spectroscopic variations of AG Dra, a prototypical eruptive symbiotic system. We discuss the…”
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The O I] 1641A line as a probe of symbiotic star winds by Shore, S. N, Wahlgren, G. M

“…The neutral oxygen resonance 1302A line can, if the optical depth is sufficiently high, de-excite by an intercombination transition at 1641A to a metastable…”
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The Goddard High-Resolution Spectrograph: In-Orbit Performance by Heap, S. R., Brandt, J. C., Randall, C. E., Carpenter, K. G., Leckrone, D. S., Maran, S. P., Smith, A. M., Beaver, E. A., Boggess, A., Ebbets, D. C., Garner, H. W., Hutchings, J. B., Jura, M., Linsky, J. L., Savage, B. D., Cardelli, J. A., Trafton, L. M., Walter, F. M., Weymann, R. J., Ake, T. B., Crenshaw, D. M., Malumuth, E. M., Robinson, R. D., Sandoval, J. L., Shore, S. N., Wahlgren, G. M., Bruhweiler, F., Lindler, D. J., Gilliland, R. L., Hulbert, S. J., Soderblom, D. R.

“…The in-orbit performance of the Goddard High-Resolution Spectrograph onboard the Hubble Space Telescope (HST) is presented. This report covers the pre-COSTAR…”
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The spectroscopic evolution of the symbiotic-like recurrent nova V407 Cygni during its 2010 outburst. II. The circumstellar environment and the aftermath by Shore, S. N, Wahlgren, G. M, Augusteijn, T, Liimets, T, Koubsky, P, Slechta, M, Votruba, V

“…The nova outburst of V407 Cyg in 2010 Mar. 10 was the first observed for this star but its close resemblance to the well known symbiotic-like recurrent nova RS…”
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Re II and Other Exotic Spectra in HD 65949 by Cowley, C. R, Hubrig, S, Wahlgren, G. M

“…J.Phys.Conf.Ser.130:012005,2008 Powerful astronomical spectra reveal an urgent need for additional work on atomic lines, levels, and oscillator strengths. The…”
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HD 65949: Rosetta Stone or Red Herring by Cowley, C. R, Hubrig, S, Palmeri, P, Quinet, P, Biémont, É, Wahlgren, G. M, Schütz, O, González, J. F

“…HD 65949 is a late B star with exceptionally strong Hg II at 3984[A], but it is not a typical HgMn star. The Re II spectrum is of extraordinary strength…”
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