Zobrazeno 1 - 10
of 40
pro vyhledávání: '"Charles R. Proffitt"'
Autor:
Charles R. Proffitt, Harim Jin, Simone Daflon, Daniel J. Lennon, Norbert Langer, Katia Cunha, Talawanda Monroe
Publikováno v:
The Astrophysical Journal, Vol 968, Iss 1, p 1 (2024)
New boron abundances or upper limits have been determined for eight early B stars in the young Galactic open cluster NGC 3293, using UV spectra obtained by the Hubble Space Telescope Cosmic Origins Spectrograph. With previous observations, there are
Externí odkaz:
https://doaj.org/article/9aeec0a537754580ba5ba0c4cc7c9027
Publikováno v:
The Astronomical Journal, Vol 167, Iss 5, p 213 (2024)
We demonstrate an approach to determine spectral energy distribution (SED) templates that are accurate to the 1% level from the visible through the infrared for nearby (unextincted) solar-type stars. Our approach is based only on measurements of T _e
Externí odkaz:
https://doaj.org/article/130e57fa8bbd48c3adb36e4e2c981d6d
Autor:
Sean Lockwood, Adric R. Riedel, Svea Hernandez, Linda J. Smith, David J. Sahnow, Ivo Busko, TalaWanda R. Monroe, Travis Fischer, Joanna M. Taylor, Daniel E. Welty, Alessandra Aloisi, Leonardo Ubeda, Bethan L. James, Robert Jedrzejewski, Cristina Oliveira, William J. Fischer, Allyssa Riley, Christopher Britt, Debopam Som, Ravi Sankrit, Sangmo Tony Sohn, Elaine M. Frazer, Gisella De Rosa, Charles R. Proffitt, Rachel Plesha, Julia Roman-Duval, Alexander W. Fullerton, Richard A. Shaw, Joleen K. Carlberg
Publikováno v:
Research Notes of the AAS. 4:205
Autor:
Charles R. Proffitt
Publikováno v:
Solar Neutrinos ISBN: 9780429502811
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ffb121027c3f58a3745a195773a66e21
https://doi.org/10.1201/9780429502811-29
https://doi.org/10.1201/9780429502811-29
Autor:
Charles R. Proffitt, Glenn M. Wahlgren, David S. Leckrone, Krister E. Nielsen, Saul J. Adelman
Publikováno v:
The Astronomical Journal. 130:2312-2317
The gallium abundance in HgMn stars has been reported to be different for analyses conducted from spectral lines in the optical versus those from the ultraviolet. We pursue this ultraviolet-optical discrepancy from a line-blending perspective by inve
Publikováno v:
The Astrophysical Journal Supplement Series; 155(1), pp 179-189 (2004)
Very heavy elements (Pt, Au, Hg, Tl, and Bi) are found to be enhanced inthe atmospheres of the chemically peculiar stars of the upper mainsequence by up to a million times the solar system levels. Suchenhancements are believed to result from atmosphe
Autor:
Casey M. Lisse, Charles R. Proffitt, Carol A. Grady, Kailash C. Sahu, Bruce E. Woodgate, Mario Livio, Don J. Lindler, John Krist, Sara R. Heap, Theodore R. Gull, R. L. Gilliland, Mark Clampin, Daniela Calzetti
Publikováno v:
The Astrophysical Journal. 612:481-495
The STIS/CCD camera on the {\em Hubble Space Telescope (HST)} was used to take deep optical images near the K2V main-sequence star $\epsilon$ Eridani in an attempt to find an optical counterpart of the dust ring previously imaged by sub-mm observatio
Autor:
D. J. Lindler, Randy A. Kimble, Charles R. Proffitt, Carol A. Grady, Chuck Bowers, Bruce E. Woodgate, T. R. Gull, P. Plait, Eliot M. Malumuth, Alycia J. Weinberger, Sara R. Heap
Publikováno v:
Publications of the Astronomical Society of the Pacific. 115:1036-1049
The unfiltered Space Telescope Imaging Spectrograph (STIS) CCD in tandem with focal plane wedges and a Lyot stop provides a simple white‐light coronagraph with a bandpass of 0.2–1.0 μm, which has been used since late 1998 to image nebulosity aro
Autor:
Charles R. Proffitt
Publikováno v:
The Astrophysical Journal. 571:955-965
We present non-LTE calculations for the ionization equilibrium of C I tailored to match the HgMn star χ Lupi. Comparisons are made with the UV C I lines observed using the Hubble Space Telescope's Goddard High Resolution Spectrograph, as well as wit
Publikováno v:
The Astrophysical Journal. 557:320-325
We have determined the lead, tin, and germanium abundances of the early B main-sequence star AV 304 in the Small Magellanic Cloud (SMC) by using archival STIS/HST G140M spectral data to measure the Ge IV 1229.8 A, Sn IV 1313.5 A, and Pb IV 1313.1 A r