For the First Time Moderate Resolution X-ray Spectroscopy (2009)
From Chandra, Jeffrey L. Linsky
ABSTRACT I summarize and comment upon studies of stellar coronae using the remarkable spectroscopic and imaging capabilities of the Chandra X-ray Observatory. Nearly all types of stars are detected...
I. Methodology, Jeffrey L. Linsky, Seth Redfield, Brian E. Wood, Nikolai Piskunov
In this Ðrst in a series of papers, we develop a methodology for constructing three-dimensional models of the local interstellar cloud (LIC) and adjacent warm clouds in the local interstellar medium...
Deuterium Observations in our Galaxy (View A) (2007)
Jeffrey L. Linsky, Brian E. Wood
Abstract. Accurate measurements of the D/H ratio in our Galaxy provide critical tests of Galactic chemical evolution and constrain the primordial value of D/H. Very high quality ultraviolet spectra...
The Warm Local ISM: Structure, Properties, and Theory (2007)
Jeffrey L. Linsky, Seth Redfield, Brian Wood
Abstract. Ultraviolet spectra of interstellar absorption lines for lines of sight to nearby stars are providing new information about the physical properties and structure of the Local Interstellar...
Rachel A. Osten, Alexander Brown, R. Ayres, Jeffrey L. Linsky, Stephen A. Drake, ...
We present the results of a coordinated observing campaign on the short-period (1.14 days) RS CVn binary p2 Coronae Borealis with the VLA, ASCA, and RXT E. We also discuss earlier observations of the...
Thomas R. Ayres, Alexander Brown, A. Osten, David P. Huenemoerder, Jeremy J. Drake, ...
In mid-September of 1999, a multiwavelength campaign was carried out on the coronally active RS Canum Venaticorum binary HR 1099 (K1 IV] G5 V; P \ 2.84 days), during commissioning of the High Energy...
Stellar Flares: How Common? How Important? (2007)
Abstract. Flares are often observed from a wide variety of stars that are called active by virtue of their rapid rotation, young age, and strong magnetic fields. Although the total energies of these...
Jeff A. Valenti, Jeffrey L. Linsky
We use our ultraviolet (UV) atlas of preÈmain-sequence stars constructed from all useful, shortwavelength, low-resolution spectra in the International Ultraviolet Explorer (IUE) satellite Final...
Anita Krishnamurthi, Christopher S. Reynolds, Jeffrey L. Linsky, Eduardo Marti N
We present results from a 36 ks observation of the core of the Pleiades open cluster using ACIS-I on the Chandra X-Ray Observatory. We have detected 57 sources, most of which do not have previously...
DEUTERIUM ABUNDANCE IN THE LOCAL ISM AND POSSIBLE SPATIAL VARIATIONS (2007)
Abstract. Excellent HST/GHRS spectra of interstellar hydrogen and deuterium Lyman-ff absorption toward nearby stars allow us to identify systematic errors that have plagued earlier work and to...
In 1995È1996, the Goddard High Resolution Spectrograph (2007)
Brian E. Wood, Carol W. Ambruster, Alexander Brown, Jeffrey L. Linsky
We analyze local interstellar medium (LISM) absorption observed in the Lya and Mg II h and k lines of six nearby K dwarf stars, using UV spectra of these stars obtained with the Goddard High...
Isabella Pagano, Jeffrey L. Linsky, Lee Carkner, Richard D. Robinson, Bruce Woodgate
We report on observations of the dM1e Ñare star AU Microscopii obtained with the Space Telescope Imaging Spectrograph (STIS) on 1998 September 6. A total of 10,105 s of observations were obtained...
Jeffrey L. Linsky, Seth Redfield, Brian E. Wood, Nikolai Piskunov, Hubble Space Telescope
In this first in a series of papers, we develop a methodology for constructing three-dimensional models of the Local Interstellar Cloud (LIC) and adjacent warm clouds in the Local Interstellar Medium...
The Origin of Radio Scintillation In the Local Interstellar Medium (2007)
Linsky, Jeffrey L., Rickett, Barney J., Redfield, Seth
We study three quasar radio sources (B1257-326, B1519-273, and J1819+385) that show large amplitude intraday and annual scintillation variability produced by the Earth's motion relative to...
Redfield, Seth, Linsky, Jeffrey L.
We present an empirical dynamical model of the local interstellar medium based on 270 radial-velocity measurements for 157 sight lines toward nearby stars. Physical-parameter measurements (i.e.,...
What is the Total Deuterium Abundance in the Local Galactic Disk? (2007)
Linsky, Jeffrey L., Draine, Bruce T., Moos, H. W., Jenkins, Edward B., Wood, Brian E., Oliveira, Cristina, ...
Analyses of spectra obtained with the Far Ultraviolet Spectroscopic Explorer (FUSE) satellite, together with spectra from the Copernicus and IMAPS instruments, reveal an unexplained very wide range...
Dependence of Heliospheric Lyman-alpha Absorption on the Interstellar Magnetic Field (2007)
Wood, Brian E., Izmodenov, Vladislav V., Linsky, Jeffrey L., Alexashov, Dmitry
We use newly developed 3D kinetic MHD models of the heliosphere to predict heliospheric H I Lyman-alpha absorption for various lines of sight. These predictions are compared with actual Lyman-alpha...
Lyman-alpha Absorption from Heliosheath Neutrals (2006)
Wood, Brian E., Izmodenov, Vladislav V., Linsky, Jeffrey L., Malama, Yury G.
We assess what information HST observations of stellar Ly-alpha lines can provide on the heliosheath, the region of the heliosphere between the termination shock and heliopause. To search for...
Linsky, Jeffrey L., Gagne, Marc, Mytyk, Anna, McCaughrean, Mark, Andersen, Morten
We present and analyze the first high-resolution X-ray images ever obtained of the Eagle Nebula star-forming region. On 2001 July 30 the Chandra X-ray Observatory obtained a 78 ks image of the Eagle...
What is the Total Deuterium Abundance in the Local Galactic Disk? (2006)
Linsky, Jeffrey L., Draine, Bruce T., Moos, H. W., Jenkins, Edward B., Wood, Brian E., Oliveira, Cristina, ...
Analyses of spectra obtained with the Far Ultraviolet Spectroscopic Explorer (FUSE) satellite, together with spectra from the Copernicus and IMAPS instruments, reveal an unexplained very wide range...
The Origins of Fluorescent H2 Emission From T Tauri~Stars (2006)
Herczeg, Gregory J., Linsky, Jeffrey L., Walter, Frederick M., Gahm, Gosta F., Johns-Krull, Christopher M.
We survey fluorescent H2 emission in HST/STIS spectra of the classical T Tauri stars (CTTSs) TW Hya, DF Tau, RU Lupi, T Tau, and DG Tau, and the weak-lined T Tauri star (WTTS) V836 Tau. From each of...
Finkelstein, Steven L., Morse, Jon A., Green, James C., Linsky, Jeffrey L., Shull, J. Michael, Snow, Theodore P., ...
We present new optical emission-line images of the young SNR 1E 0102-7219 (E0102) in the SMC obtained with the HST Advanced Camera for Surveys (ACS). E0102 is a member of the oxygen-rich class of...
Coronal Emission Measures and Abundances for Moderately Active K Dwarfs Observed by Chandra (2006)
Wood, Brian E., Linsky, Jeffrey L.
We have used Chandra to resolve the nearby 70 Oph (K0 V+K5 V) and 36 Oph (K1 V+K1 V) binary systems for the first time in X-rays. The LETG/HRC-S spectra of all four of these stars are presented and...
New Mass Loss Measurements from Astrospheric Lyman-alpha Absorption (2005)
Wood, Brian E., Mueller, Hans-Reinhard, Zank, Gary P., Linsky, Jeffrey L., Redfield, Seth
Measurements of stellar mass loss rates are used to assess how wind strength varies with coronal activity and age for solar-like stars. Mass loss generally increases with activity, but we find...
Wood, Brian E., Redfield, Seth, Linsky, Jeffrey L., Mueller, Hans-Reinhard, Zank, Gary P.
We search the Hubble Space Telescope (HST) archive for previously unanalyzed observations of stellar H I Lyman-alpha emission lines, our primary purpose being to look for new detections of...
The Structure of the Local Interstellar Medium. III. Temperature and Turbulence (2004)
Redfield, Seth, Linsky, Jeffrey L.
We present 50 individual measurements of the gas temperature and turbulent velocity in the local interstellar medium (LISM) within 100 pc. By comparing the absorption line widths of many ions with...
Two New Low Galactic D/H Measurements from FUSE (2004)
Wood, Brian E., Linsky, Jeffrey L., Hebrard, Guillaume, Williger, Gerard M., Moos, H. Warren, Blair, William P.
We analyze interstellar absorption observed towards two subdwarf O stars, JL 9 and LSS 1274, using spectra taken by the Far Ultraviolet Spectroscopic Explorer (FUSE). Column densities are measured...
The Far-Ultraviolet Spectra of TW Hya. II. Models of H2 Fluorescence in a Disk (2004)
Herczeg, Gregory J., Wood, Brian E., Linsky, Jeffrey L., Valenti, Jeff A., Johns-Krull, Chris M.
We measure the temperature of warm gas at planet-forming radii in the disk around the classical T Tauri star (CTTS) TW Hya by modelling the H2 fluorescence observed in HST/STIS and FUSE spectra....
HST/STIS High Resolution Echelle Spectra of alpha Centauri A (G2 V) (2003)
Pagano, Isabella, Linsky, Jeffrey L., Valenti, Jeff, Duncan, Douglas K.
We describe and analyze HST/STIS observations of the G2 V star alpha Centauri A (alpha Cen A, HD 128620), a star similar to the Sun. The high resolution echelle spectra obtained with the E140H and...
Redfield, Seth, Linsky, Jeffrey L.
Moderate and high-resolution measurements (R ~ 40,000) of interstellar resonance lines of D I, C II, N I, O I, Al II, and Si II (light ions) are presented for all available observed targets located...
D/H as a Measure of Chemical Imhomogeneity in our Galaxy (2003)
Accurate measurements of interstellar deuterium abundances along lines of sight extending out to several hundred parsecs by FUSE and other instruments is making D/H a useful tool for understanding...
Atomic Deuterium/Hydrogen in the Galaxy (2003)
An accurate value of the deuterium/hydrogen (D/H) ratio in the local interstellar medium (LISM) and a better understanding of the D/H variations with position in the Galactic disk can provide...
A Far Ultraviolet Spectroscopic Explorer Survey of Coronal Forbidden Lines in Late-Type Stars (2002)
Redfield, Seth, Ayres, Thomas R., Linsky, Jeffrey L., Ake, Thomas B., Dupree, A. K., Robinson, Richard D., ...
We present a survey of coronal forbidden lines detected in Far Ultraviolet Spectroscopic Explorer (FUSE) spectra of nearby stars. Two strong coronal features, Fe XVIII 974 A and Fe XIX 1118 A, are...
Wood, Brian E., Redfield, Seth, Linsky, Jeffrey L., Sahu, M. S.
We use ultraviolet spectra of Capella from the Hubble Space Telescope (HST) and Far Ultraviolet Spectroscopic Explorer (FUSE) satellites to study interstellar absorption lines from the Local...
Daniel, Kathryne J., Linsky, Jeffrey L., Gagne, Marc
We present the analysis of a 38.4 ks and a 23.6 ks observation of the core of the Pleiades open cluster. The Advanced CCD Imaging Spectrometer on board the Chandra X-ray Observatory detected 99 X-ray...
Measured Mass Loss Rates of Solar-like Stars as a Function of Age and Activity (2002)
Wood, Brian E., Mueller, Hans-Reinhard, Zank, Gary P., Linsky, Jeffrey L.
Collisions between the winds of solar-like stars and the local ISM result in a population of hot hydrogen gas surrounding these stars. Absorption from this hot H I can be detected in high resolution...
The FUV spectrum of TW Hya. I. Observations of H$_2$ Fluorescence (2002)
Herczeg, Gregory J., Linsky, Jeffrey L., Valenti, Jeff A., Johns-Krull, Chris M., Wood, Brian E.
We observed the classical T Tauri star TW Hya with \textit{HST}/STIS using the E140M grating, from 1150--1700 \AA, with the E230M grating, from 2200--2900 \AA, and with \FUSE from 900--1180 \AA....
A FAR ULTRAVIOLET SPECTROSCOPIC EXPLORER SURVEY OF CORONAL FORBIDDEN LINES IN LATE-TYPE STARS (2002)
Seth Redfield, Thomas R. Ayres, Jeffrey L. Linsky, Thomas B. Ake, A. K. Dupree
We present a survey of coronal forbidden lines detected in Far Ultraviolet Spectroscopic Explorer (FUSE) spectra of nearby stars. Two strong coronal features, Fe xviii 974 and Fe xix 1118, are...
Theodore Simon, Thomas R. Ayres, Seth Redfield, Jeffrey L. Linsky
In deeply convective stars, the nonthermal energy required to heat the chromosphere ultimately is supplied by turbulent magnetoconvection. Because the early and middle A stars have very shallow...
Thomas R. Ayres, Er Brown, Graham M. Harper, Rachel A. Osten, Jeffrey L. Linsky, Brian E. Wood, ...
We describe an extensive search with the Space Telescope Imaging Spectrograph (STIS) for ultraviolet coronal (T> 10 6 K) forbidden lines in a sample of 29 F–M dwarfs, giants, and supergiants....
The 3D-structure of the LISM (2001)
Wood, Brian E., Redfield, Seth, Linsky, Jeffrey L.
We review what is currently known about the structure of interstellar material in the solar neighborhood, emphasizing how observations from the Hubble Space Telescope (HST) have improved our...
Microstructure of the Local Interstellar Cloud and the Identification of the Hyades Cloud (2001)
Redfield, Seth, Linsky, Jeffrey L.
We analyze high-resolution UV spectra of the Mg II h and k lines for 18 members of the Hyades Cluster to study inhomogeneity along these proximate lines of sight. The observations were taken by the...
Wood, Brian E., Linsky, Jeffrey L., Mueller, Hans-Reinhard, Zank, Gary P.
We study H I Lyman-alpha absorption observed by the Hubble Space Telescope toward the nearby binary system Alpha Cen (G2 V+K0 V) and its distant companion star Proxima Cen (M5.5 Ve). Absorption from...
Observations of the core of the Pleiades with the Chandra X-ray Observatory (2000)
Krishnamurthi, Anita, Reynolds, Christopher S., Linsky, Jeffrey L., Martin, Eduardo, Gagna, Marc
We present results from a 36-ksec observation of the core of the Pleiades open cluster using ACIS-I on the Chandra X-ray Observatory. We have detected 57 sources, most of which do not have previously...
The Mg II and Lyman-alpha Lines of Nearby K Dwarfs: ISM Components and Flux Measurements (2000)
Wood, Brian E., Ambruster, Carol W., Brown, Alexander, Linsky, Jeffrey L.
We analyze local ISM absorption observed in the Lyman-alpha and Mg II h & k lines of six nearby K dwarf stars, using UV spectra of these stars obtained with the Goddard High Resolution Spectrograph...
Heliospheric, Astrospheric, and Insterstellar Lyman-alpha Absorption Toward 36 Oph (2000)
Wood, Brian E., Linsky, Jeffrey L., Zank, Gary P.
We use high-resolution UV spectra taken by the Space Telescope Imaging Spectrograph instrument on board the Hubble Space Telescope to study the 5.5 pc line of sight to the K0 V star 36 Oph A. The one...
A Search for Radio Emission at the Bottom of the Main Sequence and Beyond (1999)
Krishnamurthi, Anita, Leto, Giuseppe, Linsky, Jeffrey L.
We have used the VLA to conduct a deep search for 3.6 cm radio emission from nearby very low mass stars and brown dwarfs. The Gudel-Benz relation is used to predict radio luminosities for some very...
The Active Corona of HD 35850 (F8 V) (1998)
Gagne, Marc, Valenti, Jeff A., Linsky, Jeffrey L., Tagliaferri, Gianpiero, Covino, Stefano, Guedel, Manuel
We present Extreme Ultraviolet Explorer spectroscopy and photometry of the nearby F8 V star HD 35850 (HR 1817). The EUVE spectra reveal 28 emission lines from Fe IX and Fe XV to Fe XXIV. The Fe XXI...
Periodic X-ray Emission from the O7 V Star theta^1 Orionis C (1997)
Gagne, Marc, Caillault, Jean-Pierre, Stauffer, John R., Linsky, Jeffrey L.
We report the discovery of large-amplitude, periodic X-ray emission from the O7 V star theta^1 Orionis C, the central star of the Orion Nebula. Ten ROSAT HRI snapshots of the Trapezium cluster taken...
NEW INSIGHTS INTO NON-RADIATIVE HEATING IN LATE-A STAR CHROMOSPHERES (1995)
Walter, Frederick M., Matthews, Lynn D., Linsky, Jeffrey L.
Using new and archival spectra from the Goddard High Resolution Spectrograph, we have searched for evidence of chromospheric and transition region emission in six stars of mid- to late-A spectral...
Fox, David C., Linsky, Jeffrey L., Veale, Anthony, Dempsey, Robert C., Brown, Alex, Neff, James E., ...
Object Design Inc. Objectstore User Guide, chapter 9 (1993)
Seth Redfield, Jeffrey L. Linsky
In this second paper in a series on the structure of the LISM, we construct a three-dimensional model of the Local Interstellar Cloud (LIC) based on HST, EUVE, and ground-based Ca II spectra....
Observations of the infrared triplet of singly ionized calcium (1970)
Linsky, Jeffrey L., Teske, Richard G., Wilkinson, Carol W.
Observations are presented of the Ca ii infrared triplet (8498 Å, 8542 Å, and 8662 Å) at three positions on the solar disk to make possible direct analyses of the lines and comparisons with...