The voyager interstellar mission

Rudd, R. P.; Hall, J. R.; Spradlin, G. L.

doi:10.1016/s0094-5765(97)00146-x

Cited by 10 publications

(6 citation statements)

References 1 publication

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“…At that point NASA initiated the Voyager Interstellar Mission. Its goals are not only to continue investigating the interplanetary medium but also to characterize the structure of the heliosphere and ultimately to study the ISM (Rudd et al 1997).…”

Section: Introductionmentioning

confidence: 99%

Measuring the Local ISM along the Sight Lines of the Two Voyager Spacecraft with HST/STIS

Zachary

Redfield

Linsky

et al. 2018

ApJ

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In 2012, Voyager 1 crossed the heliopause, becoming the first human-made object to exit the solar system. This milestone signifies the beginning of an important new era for local interstellar medium (LISM) exploration. We present measurements of the structure and composition of the LISM in the immediate path of the Voyager spacecraft by using high-resolution Hubble Space Telescope (HST ) spectra of nearby stars that lie along the same lines of sight. We provide a comprehensive inventory of LISM absorption in the near-ultraviolet (2600-2800Å) and far-ultraviolet (1200-1500 A). The LISM absorption profiles are used to make comparisons between each pair of closely spaced (<15 • ) sight lines. With fits to several absorption lines, we make measurements of the physical properties of the LISM. We estimate electron density along the Voyager 2 sight line, and our values are consistent with recent measurements by Voyager 1. Excess absorption in the H I Lyα line displays the presence of both the heliosphere and an astrosphere around GJ 780. This is only the 14th detection of an astrosphere, and the large mass-loss rate (Ṁ = 10Ṁ ) is consistent with other subgiant stars. The heliospheric absorption matches the predicted strength for a sight line 58 • from the upwind direction. As both HST and Voyager reach the end of their lifetimes, we have the opportunity to synthesize their respective observations, combining in situ measurements with the shortest possible line-of-sight measurements to study the Galactic ISM surrounding the Sun.

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Section: Introductionmentioning

confidence: 99%

Measuring the Local ISM along the Sight Lines of the Two Voyager Spacecraft with HST/STIS

Zachary

Redfield

Linsky

et al. 2018

ApJ

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“…The infrared spectroscopy of the acetylene molecule C 2 H 2 is important for atmospheric, planetary, and astrophysical applications (prebiotic molecule), as well as for industrial applications. This molecule is present as a trace constituent in the upper atmosphere of giant planets and satellites such as Titan where it results from methane photodissociation and has been detected for example in spectra recorded with the infrared radiometer-infrared spectrometer (IRIS) instrument on board Voyager 1 and 2 [1]. Acetylene was also observed in the circumstellar shell of cool carbon stars such as IRC+10216 [2], and in interstellar clouds.…”

Section: Introductionmentioning

confidence: 99%

Measurement of absolute line intensities in the ν5–ν4 band of 12C2H2 using SOLEIL synchrotron far infrared AILES beamline

Jacquemart

Gómez

Lacome

et al. 2010

Journal of Quantitative Spectroscopy and Radiative Transfer

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Absolute intensities of about 120 lines of the 12 C 2 H 2 molecule are reported for the ν 4 − ν 5 band between 65 and 192 cm −1 , with an average accuracy of 5%. Vibrational transition dipole moment squared values and empirical Herman-Wallis coefficients are obtained allowing modelling the rotational dependence of the transition dipole moment squared. Special care is taken to accurately determine an apparatus function for the Bruker IFS 125-HR coupled to the synchrotron SOLEIL far infrared AILES beamline in order to minimize its effects on the line parameter retrieval.

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“…Since both Voyager spacecraft were already outfitted with the necessary in situ instrumentation, these diverging trajectories presented a unique opportunity for the Heliophysics and Astrophysics communities: a chance to sample the outer limits of the solar system and its interface with the interstellar medium for the first time and from two spatially removed vantage points. Thus, on 1 January 1990, the Voyager Mission ended and the Voyager Interstellar Mission (VIM) officially began [10]. Because of the changed nature of the mission, only seven of the original 11 instruments were kept powered on: all of the particles and fields instruments, as well as the PRA and UVS.…”

Section: Past Successes For Cross-disciplinary Sciencementioning

confidence: 99%

Cross-NASA divisional relevance of an Ice Giant mission

Cohen

Rymer

2020

Phil. Trans. R. Soc. A.

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Robotic space exploration to the outer solar system is difficult and expensive and the space science community works inventively and collaboratively to maximize the scientific return of missions. A mission to either of our solar system Ice Giants, Uranus and Neptune, will provide numerous opportunities to address high-level science objectives relevant to multiple disciplines and deliberate cross-disciplinary mission planning should ideally be woven in from the start. In this review, we recount past successes as well as (NASA-focused) challenges in performing cross-disciplinary science from robotic space exploration missions and detail the opportunities for broad-reaching science objectives from potential future missions to the Ice Giants. This article is part of a discussion meeting issue ‘Future exploration of ice giant systems’.

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The voyager interstellar mission

Cited by 10 publications

References 1 publication

Measuring the Local ISM along the Sight Lines of the Two Voyager Spacecraft with HST/STIS

Measuring the Local ISM along the Sight Lines of the Two Voyager Spacecraft with HST/STIS

Measurement of absolute line intensities in the ν5–ν4 band of 12C2H2 using SOLEIL synchrotron far infrared AILES beamline

Cross-NASA divisional relevance of an Ice Giant mission

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