Article (Scientific journals)
Spatially resolved spectroscopy of the debris disk HD 32297. Further evidence of small dust grains
Bhowmik, T.; Boccaletti, A.; Thébault, P. et al.
2019In Astronomy and Astrophysics, 630, p. 85
Peer Reviewed verified by ORBi
 

Files


Full Text
aa36076-19.pdf
Publisher postprint (986 kB)
Download

https://www.aanda.org/articles/aa/abs/2019/10/aa36076-19/aa36076-19.html - Copyright T. Bhowmik et al. 2019, published by EDP Sciences


All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
techniques: image processing; stars: individual: HD 32297; techniques: high angular resolution; methods: data analysis; infrared: planetary systems; Astrophysics - Earth and Planetary Astrophysics; Astrophysics - Instrumentation and Methods for Astrophysics
Abstract :
[en] Context. Spectro-photometry of debris disks in total intensity and polarimetry can provide new insight into the properties of the dust grains therein (size distribution and optical properties). <BR /> Aims: We aim to constrain the morphology of the highly inclined debris disk HD 32297. We also intend to obtain spectroscopic and polarimetric measurements to retrieve information on the particle size distribution within the disk for certain grain compositions. <BR /> Methods: We observed HD 32297 with SPHERE in Y, J, and H bands in total intensity and in J band in polarimetry. The observations are compared to synthetic models of debris disks and we developed methods to extract the photometry in total intensity overcoming the data-reduction artifacts, namely the self-subtraction. The spectro-photometric measurements averaged along the disk mid-plane are then compared to model spectra of various grain compositions. <BR /> Results: These new images reveal the very inner part of the system as close as 0.15″. The disk image is mostly dominated by the forward scattering making one side (half- ellipse) of the disk more visible, but observations in total intensity are deep enough to also detect the back side for the very first time. The images as well as the surface brightness profiles of the disk rule out the presence of a gap as previously proposed. We do not detect any significant asymmetry between the northeast and southwest sides of the disk. The spectral reflectance features a "gray to blue" color which is interpreted as the presence of grains far below the blowout size. <BR /> Conclusions: The presence of sub-micron grains in the disk is suspected to be the result of gas drag and/or "avalanche mechanisms". The blue color of the disk could be further investigated with additional total intensity and polarimetric observations in K and H bands respectively to confirm the spectral slope and the fraction of polarization. <P />Reduced images are also available at the CDS via anonymous ftp to <A href="http://cdsarc.u-strasbg.fr">http://cdsarc.u-strasbg.fr</A> (ftp://130.79.128.5) or via <A href="http://cdsarc.u-strasbg.fr/viz- bin/cat/J/A+A/630/A85">http://cdsarc.u-strasbg.fr/viz- bin/cat/J/A+A/630/A85</A>Based on data collected at the European Southern Observatory, Chile under the programs 098.C-0686(A) and 098.C-0686(B).
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Bhowmik, T.;  LESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Université de Paris, 5 place Jules Janssen, 92195, Meudon, France
Boccaletti, A.;  LESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Université de Paris, 5 place Jules Janssen, 92195, Meudon, France
Thébault, P.;  LESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Université de Paris, 5 place Jules Janssen, 92195, Meudon, France
Kral, Q.;  LESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Université de Paris, 5 place Jules Janssen, 92195, Meudon, France
Mazoyer, J.;  Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA, 91109, USA
Milli, J.;  CNRS, IPAG, Université Grenoble Alpes, 38000, Grenoble, France ; European Southern Observatory, Alonso de Córdova 3107, Casilla, 19001, Vitacura, Santiago 19, Chile
Maire, Anne-Lise ;  Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany ; STAR Institute, Université de Liège, Allée du Six Août 19c, B-4000 Liège, Belgium
van Holstein, R. G.;  Leiden Observatory, Leiden University, PO Box 9513, 2300, RA Leiden, The Netherlands
Augereau, J.-C.;  CNRS, IPAG, Université Grenoble Alpes, 38000, Grenoble, France
Baudoz, P.;  LESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Université de Paris, 5 place Jules Janssen, 92195, Meudon, France
Feldt, M.;  Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany
Galicher, Raphaël;  LESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Université de Paris, 5 place Jules Janssen, 92195, Meudon, France
Henning, T.;  Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany
Lagrange, A.-M.;  CNRS, IPAG, Université Grenoble Alpes, 38000, Grenoble, France
Olofsson, J.;  Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany ; Instituto de Física y Astronomía, Facultad de Ciencias, Universidad de Valparaíso, Avenue Gran Bretaña 1111, Valparaíso, Chile ; Núcleo Milenio Formación Planetaria â NPF, Universidad de Valparaíso, Avenue Gran Bretaña 1111, Valparaíso, Chile
Pantin, E.;  Laboratoire AIM, CEA/DRF - CNRS - Université Paris Diderot, IRFU/SAp, UMR 7158, 91191, Gif-sur-Yvette, France
Perrot, C.;  LESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Université de Paris, 5 place Jules Janssen, 92195, Meudon, France ; Instituto de Física y Astronomía, Facultad de Ciencias, Universidad de Valparaíso, Avenue Gran Bretaña 1111, Valparaíso, Chile ; Núcleo Milenio Formación Planetaria â NPF, Universidad de Valparaíso, Avenue Gran Bretaña 1111, Valparaíso, Chile)
More authors (7 more) Less
Language :
English
Title :
Spatially resolved spectroscopy of the debris disk HD 32297. Further evidence of small dust grains
Publication date :
01 October 2019
Journal title :
Astronomy and Astrophysics
ISSN :
0004-6361
eISSN :
1432-0746
Publisher :
EDP Sciences, Les Ulis, France
Volume :
630
Pages :
A85
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 21 January 2020

Statistics


Number of views
41 (2 by ULiège)
Number of downloads
26 (2 by ULiège)

Scopus citations®
 
20
Scopus citations®
without self-citations
3
OpenCitations
 
16

Bibliography


Similar publications



Contact ORBi