J/A+A/672/A114 FITS images of HST debris disks (Ren+, 2023)
Debris Disk Color with the Hubble Space Telescope.
Ren B.B., Rebollido I., Choquet E., Zhou W.-H., Perrin M. D., Schneider G.,
Milli J., Wolff S.G., Chen C.H., Debes J.H., Hagan J.B., Hines D.C.,
Millar-Blanchaer M.A., Pueyo L., Roberge A., Serabyn E., Soummer R.
<Astron. Astrophys. 672, A114 (2023)>
=2023A&A...672A.114R 2023A&A...672A.114R (SIMBAD/NED BibCode)
ADC_Keywords: Stars, normal ; Interstellar medium ; Optical ; Infrared
Keywords: stars: imaging - instrumentation: high angular resolution -
Kuiper Belt: general - techniques: image processing
Abstract:
Multi-wavelength scattered light imaging of debris disks may inform
dust properties including typical size and mineral composition.
Existing studies have investigated a small set of individual systems
across a variety of imaging instruments and filters, calling for
uniform comparison studies to systematically investigate dust
properties.
We obtain the surface brightness of dust particles in debris disks by
post-processing coronagraphic imaging observations, and compare the
multi-wavelength reflectance of dust. For a sample of resolved debris
disks, we perform a systematic analysis on the reflectance properties
of their birth rings.
We reduced the visible and near-infrared images of 23 debris disk
systems hosted by A through M stars using two coronagraphs onboard
the Hubble Space Telescope: the STIS instrument observations centering
at 0.58um, and the NICMOS instrument at 1.12um or 1.60um. For
proper recovery of debris disks, we used classical reference
differential imaging for STIS, and adopted non-negative matrix
factorization with forward modeling for NICMOS. By dividing disk
signals by stellar signals to take into account of intrinsic stellar
color effects, we systematically obtained and compared the reflectance
of debris birth rings at ∼90° scattering angle.
Debris birth rings typically exhibit a blue color at ∼90°
scattering angle. As the stellar luminosity increases, the color tends
to be more neutral. A likely L-shaped color-albedo distribution
indicates a clustering of scatterer properties.
The observed color trend correlates with the expected blow-out size of
dust particles. The color-albedo clustering likely suggests
different populations of dust in these systems. More detailed
radiative transfer models with realistic dust morphology will
contribute to explaining the observed color and color-albedo
distribution of debris systems.
Description:
FITS files of disk images in STIS and NICMOS (F110W and F160W) from
the Hubble Space Telescope.
The stars are located at the mathematical centers of the arrays.
The units are in counts per pixel per second.
The STIS date were reduced with classical reference differential
imaging.
The NICMOS data were reduced with non-negative matrix factorization
without a scaling factor here, so they are prone to over-fitting, and
they are fainter than their actual surface brightness.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
stars.dat 35 23 List of studied stars
list.dat 99 56 List of fits images
fits/* . 56 Individual fits images
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See also:
J/ApJ/768/25 : Spitzer & Herschel debris disks observations (Gaspar+, 2013)
J/ApJ/798/87 : Spitzer/IRS debris disk catalog. II. (Mittal+, 2015)
J/A+A/591/A108 : HD61005 SPHERE H and Ks images (Olofsson+, 2016)
J/A+A/595/A31 : SAM detection limits of 8 debris disks (Gauchet+, 2016)
J/AJ/154/245 : Spitzer-detected debris disks imaging survey (Meshkat+, 2017)
J/A+A/630/A85 : SPHERE images of HD 32297 (Bhowmik+, 2019)
J/A+A/630/A142 : HR4796 debris disk Qphi and Uphi images (Olofsson+, 2019)
J/A+A/635/A19 : HD 117214 debris disk polarization images (Engler+, 2020)
J/A+A/646/A132 : beta Pictoris debris disk image (Janson+, 2021)
J/AJ/161/78 : SPHERE astrometry for 14 debris disk stars (Matthews+, 2021)
Byte-by-byte Description of file: stars.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name Star name
12- 13 I2 h RAh right ascension (J2000)
15- 16 I2 min RAm right ascension (J2000)
18- 22 F5.2 s RAs right ascension (J2000)
24 A1 --- DE- Declination sign (J2000)
25- 26 I2 deg DEd Declination (J2000)
28- 29 I2 arcmin DEm Declination (J2000)
31- 35 F5.2 arcsec DEs Declination (J2000)
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- Name Star name
12- 13 I2 h RAh right ascension (J2000)
15- 16 I2 min RAm right ascension (J2000)
18- 22 F5.2 s RAs right ascension (J2000)
24 A1 --- DE- Declination sign (J2000)
25- 26 I2 deg DEd Declination (J2000)
28- 29 I2 arcmin DEm Declination (J2000)
31- 35 F5.2 arcsec DEs Declination (J2000)
37- 39 I3 Kibyte size Size of FITS file
41- 65 A25 --- FileName Name of FITS file, in subdirectory fits
67- 99 A33 --- Title Title of the FITS file
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Acknowledgements:
Bin Ren, bin.ren(at)oca.eu
(End) Patricia Vannier [CDS] 17-Feb-2023