First Scattered-light Images of the Gas-rich Debris Disk around 49 Ceti
Elodie Choquet
(1)
,
Julien Milli
(2)
,
Zahed Wahhaj
(2)
,
Rémi Soummer
(3)
,
Aki Roberge
(4)
,
Jean-Charles Augereau
(5)
,
Mark Booth
(6, 7)
,
Olivier Absil
(8)
,
Anthony Boccaletti
(9)
,
Christine H. Chen
(3)
,
John H. Debes
(3)
,
Carlos del Burgo
(10)
,
William R.F. Dent
(11)
,
Steve Ertel
(12)
,
Julien H. Girard
(2)
,
Elena Gofas-Salas
(13)
,
David A. Golimowski
(3)
,
Carlos A. Gonzalez
(8)
,
J. Brendan Hagan
(3)
,
Pascale Hibon
(2)
,
Dean Hines
(3)
,
Grant Kennedy
(14)
,
Anne-Marie Lagrange
(5)
,
Luca Matra
(14)
,
Dimitri Mawet
(1, 15)
,
David Mouillet
(5)
,
Mamadou N’diaye
(3, 16)
,
Marshall Perrin
(3)
,
Christophe Pinte
(5)
,
Laurent Pueyo
(3)
,
Abhijith Rajan
(17)
,
Glenn Schneider
(12)
,
Schuyler Wolff
(18)
,
Mark Wyatt
(14)
1
JPL -
Jet Propulsion Laboratory
2 ESO - European Southern Observatory [Santiago]
3 STSci - Space Telescope Science Institute
4 GSFC Exoplanets and Stellar Astrophysics Laboratory
5 IPAG - Institut de Planétologie et d'Astrophysique de Grenoble
6 Astrophysikalisches Institut und Universitätssternwarte
7 UC - Pontificia Universidad Católica de Chile
8 STAR - Space Sciences, Technologies and Astrophysics Research Institute
9 LESIA - Laboratoire d'études spatiales et d'instrumentation en astrophysique
10 INAOE - Instituto Nacional de Astrofísica, Óptica y Electrónica
11 ALMA - Atacama Large Millimeter/submillimeter Array
12 Steward Observatory
13 DOTA, ONERA, Université Paris Saclay (COmUE) [Palaiseau]
14 Institute of Astronomy [Cambridge]
15 Caltech Department of Astronomy [Pasadena]
16 COMUE UCA - COMUE Université Côte d'Azur (2015-2019)
17 ASU - Arizona State University [Tempe]
18 JHU - Johns Hopkins University
2 ESO - European Southern Observatory [Santiago]
3 STSci - Space Telescope Science Institute
4 GSFC Exoplanets and Stellar Astrophysics Laboratory
5 IPAG - Institut de Planétologie et d'Astrophysique de Grenoble
6 Astrophysikalisches Institut und Universitätssternwarte
7 UC - Pontificia Universidad Católica de Chile
8 STAR - Space Sciences, Technologies and Astrophysics Research Institute
9 LESIA - Laboratoire d'études spatiales et d'instrumentation en astrophysique
10 INAOE - Instituto Nacional de Astrofísica, Óptica y Electrónica
11 ALMA - Atacama Large Millimeter/submillimeter Array
12 Steward Observatory
13 DOTA, ONERA, Université Paris Saclay (COmUE) [Palaiseau]
14 Institute of Astronomy [Cambridge]
15 Caltech Department of Astronomy [Pasadena]
16 COMUE UCA - COMUE Université Côte d'Azur (2015-2019)
17 ASU - Arizona State University [Tempe]
18 JHU - Johns Hopkins University
Elodie Choquet
- Fonction : Auteur
- PersonId : 172857
- IdHAL : echoquet
- ORCID : 0000-0002-9173-0740
- IdRef : 169016218
Julien Milli
- Fonction : Auteur
- PersonId : 747347
- IdHAL : julien-milli
- ORCID : 0000-0001-9325-2511
- IdRef : 197344615
Rémi Soummer
- Fonction : Auteur
- PersonId : 792132
- ORCID : 0000-0003-2753-2819
Jean-Charles Augereau
- Fonction : Auteur
- PersonId : 761402
- ORCID : 0000-0002-2725-6415
- IdRef : 175126216
Olivier Absil
- Fonction : Auteur
- PersonId : 837624
Anthony Boccaletti
- Fonction : Auteur
- PersonId : 741854
- IdHAL : anthony-boccaletti
- ORCID : 0000-0001-9353-2724
- IdRef : 168150417
Elena Gofas-Salas
- Fonction : Auteur
- PersonId : 792089
- ORCID : 0000-0003-1975-0373
Grant Kennedy
- Fonction : Auteur
- PersonId : 785583
- ORCID : 0000-0001-6831-7547
Dimitri Mawet
- Fonction : Auteur
- PersonId : 761427
- ORCID : 0000-0002-8895-4735
Mamadou N’diaye
- Fonction : Auteur
- PersonId : 179405
- IdHAL : astromam
- ORCID : 0000-0002-1721-3294
Marshall Perrin
- Fonction : Auteur
- PersonId : 761400
- ORCID : 0000-0002-3191-8151
Christophe Pinte
- Fonction : Auteur
- PersonId : 843514
Schuyler Wolff
- Fonction : Auteur
- PersonId : 785590
- ORCID : 0000-0002-9977-8255
Mark Wyatt
- Fonction : Auteur
- PersonId : 764134
- ORCID : 0000-0001-9064-5598
Résumé
We present the first scattered-light images of the debris disk around 49 Ceti, a ~40 Myr A1 main-sequence star at 59 pc, famous for hosting two massive dust belts as well as large quantities of atomic and molecular gas. The outer disk is revealed in reprocessed archival Hubble Space Telescope NICMOS-F110W images, as well as new coronagraphic H-band images from the Very Large Telescope SPHERE instrument. The disk extends from 1'.'1 (65 au) to 4'.'6 (250 au) and is seen at an inclination of 73°, which refines previous measurements at lower angular resolution. We also report no companion detection larger than 3 MJup at projected separations beyond 20 au from the star (0'.'34). Comparison between the F110W and H-band images is consistent with a gray color of 49 Ceti's dust, indicating grains larger than >~2 μm. Our photometric measurements indicate a scattering efficiency/infrared excess ratio of 0.2–0.4, relatively low compared to other characterized debris disks. We find that 49 Ceti presents morphological and scattering properties very similar to the gas-rich HD 131835 system. From our constraint on the disk inclination we find that the atomic gas previously detected in absorption must extend to the inner disk, and that the latter must be depleted of CO gas. Building on previous studies, we propose a schematic view of the system describing the dust and gas structure around 49 Ceti and hypothetical scenarios for the gas nature and origin.