Gemini Planet Imager Observations of a Resolved Low-inclination Debris Disk around HD 156623

被引：1

作者：

Lewis, Briley L. ^{[1
]}

Fitzgerald, Michael P. ^{[1
]}

Esposito, Thomas M. ^{[2
,3
]}

Arriaga, Pauline ^{[1
,4
]}

Lopez, Ronald ^{[1
,5
]}

Crotts, Katie A. ^{[6
]}

Duchene, Gaspard ^{[2
,7
]}

Follette, Katherine B. ^{[8
]}

Hom, Justin ^{[9
,10
]}

Kalas, Paul ^{[3
,11
,12
]}

Matthews, Brenda C. ^{[6
,13
]}

Millar-Blanchaer, Maxwell ^{[14
]}

Wilner, David J. ^{[15
]}

Mazoyer, Johan ^{[16
]}

Macintosh, Bruce ^{[17
,18
]}

机构：

[1] UCLA, Dept Phys & Astron, Los Angeles, CA 90024 USA

[2] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA

[3] SETI Inst, Carl Sagan Ctr, 339 Bernardo Ave,Suite 200, Mountain View, CA 94043 USA

[4] Arete, 9301 Corbin Ave STE 2000, Northridge, CA 91324 USA

[5] UCSB, Dept Phys, Santa Barbara, CA 93106 USA

[6] Univ Victoria, Phys & Astron Dept, 3800 Finnerty Rd, Victoria, BC V8P 5C2, Canada

[7] Univ Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France

[8] Amherst Coll, Dept Phys & Astron, Amherst, MA 01002 USA

[9] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA

[10] Univ Arizona, Dept Astron, Tucson, AZ 85721 USA

[11] Univ Calif Berkeley, Astron Dept, Berkeley, CA 94720 USA

[12] Inst Astrophys, FORTH, GR-71110 Iraklion, Greece

[13] Natl Res Council Canada, Herzberg Astron & Astrophys, 5071 West Saanich Rd, Victoria, BC V9E 2E7, Canada

[14] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA

[15] Harvard & Smithsonian, Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA

[16] Univ Paris Cite, Univ PSL, Sorbonne Univ, LESIA,Observ Paris,CNRS, 5 Pl Jules Janssen, F-92195 Meudon, France

[17] Univ Calif Santa Cruz, 1156 High St, Santa Cruz, CA 95064 USA

[18] Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, Dept Phys, Stanford, CA 94305 USA

来源：

ASTRONOMICAL JOURNAL | 2024年 / 168卷 / 04期

基金：

美国国家科学基金会;

关键词：

INFRARED-SURVEY-EXPLORER; SCATTERED-LIGHT IMAGES; BETA-PICTORIS; SCORPIUS-CENTAURUS; ORBITAL PARAMETERS; CIRCUMSTELLAR DISK; RADIATIVE-TRANSFER; POLARIZED-LIGHT; GIANT PLANET; SOLAR-SYSTEM;

D O I：

10.3847/1538-3881/ad67e1

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The 16 Myr old A0V star HD 156623 in the Scorpius-Centaurus association hosts a high-fractional-luminosity debris disk, recently resolved in scattered light for the first time by the Gemini Planet Imager (GPI) in polarized intensity only. We present a new analysis of the GPI H-band polarimetric detection of the HD 156623 debris disk, with particular interest in its unique morphology. This debris disk lacks a visible inner clearing, unlike the majority of low-inclination disks in the GPI sample and in Sco-Cen, and it is known to contain CO gas, positioning it as a candidate "hybrid" or "shielded" disk. We use radiative transfer models to constrain the geometric parameters of the disk based on scattered light data and thermal models to constrain the unresolved inner radius based on the system's spectral energy distribution (SED). We also compute a measurement of the polarized scattering phase function, adding to the existing sample of empirical phase function measurements. We find that HD 156623's debris disk inner radius is constrained to less than 26.6 au from scattered light imagery and less than 13.4 au from SED modeling at a 99.7% confidence interval and suggest that gas drag may play a role in retaining sub-blowout-size dust grains so close to the star.

引用

页数：14

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