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The stellar population of the Lupus clouds
- J. Hughes, P. Hartigan, J. Krautter, J. Kelemen
- Physics
- 1 September 1994
We present photometric and spectroscopic observations of the H alpha emission stars in the Lupus dark cloud complex. We estimate the effective temperatures of the stars from their spectral types and…
Radiative Bow Shock Models of Herbig-Haro Objects
- P. Hartigan, J. Raymond, L. Hartmann
- Physics
- 1 May 1987
The bow-shock models of HH objects presently constructed from a collection of 43 radiative-planar-shock models are used to predict the line ratios and line profiles expected from HH objects. It is…
Mass-loss rates, ionization fractions, shock velocities, and magnetic fields of stellar jets
- P. Hartigan, J. Morse, J. Raymond
- Physics
- 20 November 1994
In this paper we calculate emission-line ratios from a series of planar radiative shock models that cover a wide range of shock velocities, preshock densities, and magnetic fields. The models cover…
Balmer-dominated Spectra of Nonradiative Shocks in the Cygnus Loop, RCW 86, and Tycho Supernova Remnants
- P. Ghavamian, J. Raymond, R. Smith, P. Hartigan
- Physics
- 24 October 2000
We present an observational and theoretical study of the optical emission from nonradiative shocks in three supernova remnants: the Cygnus Loop, RCW 86, and Tycho. The spectra of these shocks are…
Hubble Space Telescope Images of the HH 34 Jet and Bow Shock: Structure and Proper Motions
- B. Reipurth, S. Heathcote, J. Morse, P. Hartigan, J. Bally
- Physics
- 2002
We present new, deep Hα and [S II] images of the HH 34 jet and bow shock obtained with the Wide Field Planetary Camera 2 on board the Hubble Space Telescope (HST), which reveal the structure of this…
Infrared [Fe II] Emission from P Cygni’s Nebula: Atomic Data, Mass, Kinematics, and the 1600 AD Outburst
- N. Smith, P. Hartigan
- Physics
- 31 October 2005
We present moderate- and high-dispersion 1-2.5 μm spectra of the ~10'' radius nebula around P Cygni, dominated by bright emission lines of [Fe II]. Observed [Fe II] line ratios disagree with…
Internal Velocities in the Orion Nebula: Large Proper-Motion Features
- T. Doi, C. O’Dell, P. Hartigan
- Physics
- 1 July 2002
The proper motions of Herbig-Haro (HH) objects in the Orion Nebula were measured with a ±10 km s-1 accuracy using the Hubble Space Telescope Wide Field Planetary Camera 2 images in [S II], [N II],…
Hubble Space Telescope Images of the HH 111 Jet.
- B. Reipurth, P. Hartigan, S. Heathcote, J. Morse, J. Bally
- Physics
- 1 August 1997
A CANDIDATE YOUNG MASSIVE PLANET IN ORBIT AROUND THE CLASSICAL T TAURI STAR CI TAU
- C. Johns–Krull, J. McLane, G. Mace
- Physics, Geology
- 25 May 2016
The ∼2 Myr old classical T Tauri star CI Tau shows periodic variability in its radial velocity (RV) variations measured at infrared (IR) and optical wavelengths. We find that these observations are…
Going Slitless: Images of Forbidden-Line Emission Regions of Classical T Tauri Stars Observed with the Hubble Space Telescope
- P. Hartigan, S. Edwards, R. Pierson
- Physics
- 1 July 2004
We have observed five classical T Tauri stars known to have strong forbidden-line emission with STIS in slitless mode on the Hubble Space Telescope. This technique makes it possible to image jets…
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