STIS Coronagraphic Imaging of the Herbig Ae Star: HD 163296

Grady, C. A.; Devine, David; Woodgate, B. E.; Kimble, Randy A.; Bruhweiler, F. C.; Boggess, A.; Linsky, Jeffrey L.; Plait, P.; Clampin, Mark; Kalas, Paul

doi:10.1086/317222

Cited by 128 publications

(237 citation statements)

References 28 publications

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“…It is clear, today, that there are large differences between the most massive stars in this group (corresponding to spectral types B5-B0; HBe in the following), and the less massive ones, that will be called for simplicity in the following HAe stars (Natta et al 2000a). In HAe stars, we have strong evidence of the presence of circumstellar disks from millimeter interferometry (Mannings & Sargent 1997, 2000 and from direct images in the visual (Grady et al 1999(Grady et al , 2000. This is not the case for HBe stars.…”

Section: Introductionmentioning

confidence: 76%

A reconsideration of disk properties in Herbig Ae stars

Natta

Prusti

Neri

et al. 2001

A&A

329

342

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Abstract. This paper presents state-of-the-art spectral energy distributions (SEDs) of four Herbig Ae stars, based in part on new data in the mid and far-infrared and at millimeter wavelengths. The SEDs are discussed in the context of circumstellar disk models. We show that models of irradiated disks provide a good fit to the observations over the whole range of wavelengths. We offer a possible solution to the long-standing puzzle caused by the excess emission of Herbig Ae stars, where a large fraction of the stellar luminosity is re-radiated between ∼1.25 and 7 µm, with a peak at about 3 µm. We suggest that this general behaviour can be caused by dust evaporation in disks where the gas component is optically thin to the stellar radiation, as expected if the accretion rate is very low. The creation of a puffed-up inner wall of optically thick dust at the dust sublimation radius can account for the near-infrared characteristics of the SEDs. It can also naturally explain the H and K band interferometric observations of AB Aur (Millan-Gabet et al. 2001), which reveal a ring of emission of radius ∼0.3 AU. Finally, irradiated disk models can easily explain the observed intensity of the 10 µm silicate features and their variation from star to star.

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Section: Introductionmentioning

confidence: 76%

A reconsideration of disk properties in Herbig Ae stars

Natta

Prusti

Neri

et al. 2001

A&A

329

342

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“…1). Faint, residual continuum emission is seen at +6−7 , which most likely results from a background continuum source (also visible at this location in the images of Grady et al 2000).…”

Section: Vlt/x-shooter Spectroscopymentioning

confidence: 87%

“…The bipolar jet HH 409 was discovered on coronagraphic images (and later confirmed with long-slit spectra) of the Space Telescope Imaging Spectrograph (STIS) on the Hubble Space Telescope (HST; Grady et al 2000;Devine et al 2000). One of the knots (A) has also been associated with X-ray emission (Swartz et al 2005).…”

Section: Introductionmentioning

confidence: 88%

“…These epochs should then be viewed as the intervals during which the bright knots have formed in the jet, close to the driving source. (2000); (2) Grady et al (2000); (3) Wassell et al (2006); (4) Günther et al (2013); (5) Klaassen et al (2013). b) Launch epochs from radial velocities in the X-shooter spectra.…”

Section: Kinematics: Proper Motions Vs Radial Velocitiesmentioning

confidence: 99%

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Relating jet structure to photometric variability: the Herbig Ae star HD 163296

Ellerbroek

Podio

Dougados

et al. 2014

A&A

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131

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Herbig Ae/Be stars are intermediate-mass pre-main sequence stars surrounded by circumstellar dust disks. Some are observed to produce jets, whose appearance as a sequence of shock fronts (knots) suggests a past episodic outflow variability. This "jet fossil record" can be used to reconstruct the outflow history. We present the first optical to near-infrared (NIR) spectra of the jet from the Herbig Ae star HD 163296, obtained with VLT/X-shooter. We determine the physical conditions in the knots and also their kinematic "launch epochs". Knots are formed simultaneously on either side of the disk, with a regular interval of ∼16 yr. The velocity dispersion versus jet velocity and the energy input are comparable between both lobes. However, the mass-loss rate, velocity, and shock conditions are asymmetric. We findṀ jet /Ṁ acc ∼ 0.01−0.1, which is consistent with magneto-centrifugal jet launching models. No evidence of any dust is found in the high-velocity jet, suggesting a launch region within the sublimation radius (<0.5 au). The jet inclination measured from proper motions and radial velocities confirms that it is perpendicular to the disk. A tentative relation is found between the structure of the jet and the photometric variability of the central source. Episodes of NIR brightening were previously detected and attributed to a dusty disk wind. We report for the first time significant optical fadings lasting from a few days up to a year, coinciding with the NIR brightenings. These are very likely caused by dust lifted high above the disk plane, and this supports the disk wind scenario. The disk wind is launched at a larger radius than the high-velocity atomic jet, although their outflow variability may have a common origin. No significant relation between outflow and accretion variability could be established. Our findings confirm that this source undergoes periodic ejection events, which may be coupled with dust ejections above the disk plane.

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“…Each panel is labeled with the object name, wavelength, and the size of the image field of view. From left to right in each row, the image sources are references top: (13), (3), (33); center: (23), (15), (14); and bottom: (35), (4), (4).…”

Section: An Hst Survey Of Nearby T Tauri Disksmentioning

confidence: 99%

Visions of Nature's Planet Foundry: Images of Circumstellar Disks

Stapelfeldt

2004

Symp. - Int. Astron. Union

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Abstract.As the number of detected extrasolar planetary systems has steadily grown over the past five years, so too has the number of circumstellar disks with resolved images. In this contribution, I take stock of the current inventory of disk images at various wavelengths; summarize the results of a new disk imaging survey conducted with the Hubble Space Telescope; review the major inferences that can be drawn about disk structure from the extant images; and suggest areas for future progress.

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STIS Coronagraphic Imaging of the Herbig Ae Star: HD 163296

Cited by 128 publications

References 28 publications

A reconsideration of disk properties in Herbig Ae stars

A reconsideration of disk properties in Herbig Ae stars

Relating jet structure to photometric variability: the Herbig Ae star HD 163296

Visions of Nature's Planet Foundry: Images of Circumstellar Disks

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