Initial On-Orbit Performance of NICMOS

Thompson, Rodger I.; Rieke, M. J.; Schneider, Glenn; Hines, Dean C.; Corbin, Michael R.

doi:10.1086/311095

Cited by 114 publications

(94 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our object was examined by the HST on 1997 September 29 with the NIC2 camera of the NICMOS instrument (Thompson et al 1998). The observations were performed using fixed aperture and MULTIACCUM read-out mode with the filters F110W, F160W,F187N,F204M,and F212N (HST proposal 7228,PI: E. Young).…”

Section: Nic2/hstmentioning

confidence: 99%

The circumstellar disk of HH 30

Madlener

Wolf

Dutrey

et al. 2012

A&A

View full text Add to dashboard Cite

Context. Circumstellar disks are characteristic for star formation and vanish during the first few Myr of stellar evolution. During this time planets are believed to form in the dense midplane by growth, sedimentation and aggregation of dust. Indicators of disk evolution, such as holes and gaps, can be traced in the spectral energy distribution (SED) and spatially resolved images. Aims. We aim to construct a self-consistent model of HH 30 by fitting all available continuum observations simultaneously. New data sets not available in previous studies, such as high-resolution interferometric imaging with the Plateau de Bure Interferometer (PdBI) at λ = 1.3 mm and SED measured with IRS on the Spitzer Space Telescope in the mid-infrared, put strong constraints on predictions and are likely to provide new insights into the evolutionary state of this object. Methods. A parameter study based on simulated annealing was performed to find unbiased best-fit models for independent observations made in the wavelength domain λ ∼ 1 μm . . . 4 mm. The method essentially creates a Markov chain through parameter space by comparing predictions generated by our self-consistent continuum radiation transfer code MC3D with observations. Results. We present models of the edge-on circumstellar disk of HH 30 based on observations from the near-infrared to mmwavelengths that suggest the presence of an inner depletion zone with ∼45 AU radius and a steep decline of mm opacity beyond 140 AU. Our modeling indicates that several modes of dust evolution such as growth, settling, and radial migration are taking place in this object. Conclusions. High-resolution observations of HH 30 at different wavelengths with next-generation observatories such as ALMA and JWST will enable the modeling of inhomogeneous dust properties and significantly expand our understanding of circumstellar disk evolution.

show abstract

Section: Nic2/hstmentioning

confidence: 99%

The circumstellar disk of HH 30

Madlener

Wolf

Dutrey

et al. 2012

A&A

View full text Add to dashboard Cite

show abstract

“…Cotera et al (2001) observed HH 30 on 1997 September 29 with the NIC2 camera of the NICMOS instrument on HST (Thompson et al 1998). They obtained exposures in several filters, but here we consider only their 112 s exposure through the F204M filter (2.04 m, very roughly Johnson K ).…”

Section: Observationsmentioning

confidence: 99%

The Visible and Near‐Infrared Dust Opacity Law in the HH 30 Circumstellar Disk

Watson

Stapelfeldt

2004

ApJ

View full text Add to dashboard Cite

We present new images of the scattered-light disk around HH 30 at 0.44 and 0.81 m. We model these images and an existing 2.04 m image by using a multiple-scattering code, varying and fitting for the disk parameters and the dust opacity ratios at these wavelengths. A wide range of different disk geometries provide adequate fits to the data; there is no single best-fit geometry. In particular, the fits cannot resolve the ambiguity between the power-law indices in surface density and scale height. On the other hand, the inclination, opacity-mass product, scale height, and to a lesser degree the extinction to the star are relatively tightly constrained. Despite the ambiguity in geometry, we conclude that the dust opacity in the scattering layers of the outer parts of the HH 30 circumstellar disk drops from 0.44 to 2.04 m, but by less than in the low-density ISM. The median fit shows a drop by a factor of less than 2. This result is robust to reasonable changes in the disk density distribution. It suggests that moderate grain growth has occurred but that small grains still dominate the visible and near-infrared opacity.

show abstract

“…Repeated observations with UKIRT at both H and K-bands failed to detect any extended emission at the 4% level. High resolution observations with NICMOS on board the Hubble Space Telescope (Thompson et al 1997) also failed to detected any extended emission.…”

Section: Gl 989mentioning

confidence: 99%

Near-IR speckle imaging of massive young stellar objects

Álvarez

Hoare

Glindemann

et al. 2004

A&A

View full text Add to dashboard Cite

Abstract. We present near-IR speckle images of 21 massive Young Stellar Objects (YSOs) associated with outflows. The aim of this study is to search for sub-arcsecond reflection nebulae associated with the outflow cavity. We find that 6 of the massive YSOs show a conical nebula which can be interpreted in terms of reflected light from the dusty walls of the outflow cavity. In all cases, the small scale structures seen in our images are compared with outflow indicators found in the literature. No clear correlation is found between the presence of the reflection nebulosity and any property such as degree of embeddedness. We also note that 3 of the sources show close companions, one of them belonging also to the sample with conical nebula.

show abstract

Initial On-Orbit Performance of NICMOS

Cited by 114 publications

References 4 publications

The circumstellar disk of HH 30

The circumstellar disk of HH 30

The Visible and Near‐Infrared Dust Opacity Law in the HH 30 Circumstellar Disk

Near-IR speckle imaging of massive young stellar objects

Contact Info

Product

Resources

About