9 papers
Observations of High Galactic Latitude Line and Continuum Emission (912 - 1600 Ã ) with New Horizons
Jayant Murthy, James Overduin, Seth Redfield +5
We present observations of the cosmic ultraviolet background (CUVB) from 912 - 1600 A using the Stem aperture of the Alice spectrograph on the New Horizons spacecraft at 56 AU from…
High-S/N Quasar Observations with HST/COS: Deep Fields for Spectroscopy
Andrew J. Fox, Jerry Kriss, Philipp Richter +49
Hubble is still in prime observing condition for making transformative discoveries in UV astronomy. In this white paper we describe the science case for a deep (S/N>30) UV spectros…
Closing the UV Gap: Rest-frame EUV science from high-redshift QSOs as a legacy-defining capability
Rongmon Bordoloi, J. Michael Shull
The Hubble Space Telescope is the only high-resolution ultraviolet spectroscopic facility that will exist until the Habitable Worlds Observatory (HWO) achieves first light in the m…
Ionization Sources of the Local Interstellar Clouds: Two B-stars, Three White Dwarfs, and the Local Hot Bubble
J. Michael Shull, Rachel M. Curran, Michael W. Topping +1
The dominant sources of photoionizing radiation in the extreme ultraviolet (EUV) incident on the exterior of the local interstellar clouds include two nearby early B-type stars, $Î…
Quasar Spectral Energy Distributions in the Rest-Frame EUV: Hubble-COS Spectra of Two Ultra-luminous Quasars
J. Michael Shull, Rongmon Bordoloi, Charles W. Danforth
Using the Cosmic Origins Spectrograph (COS) aboard the Hubble Space Telescope with both far-UV (FUV) and near-UV (NUV) gratings, we measure the ionizing spectra of two bright, inte…
Beta Canis Majoris: The Other Major Ionization Source of the Local Interstellar Clouds
J. Michael Shull, Rachel M. Curran, Michael W. Topping
Two nearby B-type stars, CMa ( pc) and CMa ( pc), are important contributors to the photoionization of the local interstellar clouds. At spectral type B…