HST and Spitzer observations of the HD 207129 debris ring

John E. Krist, Karl R. Stapelfeldt, Bryden Geoffrey, George H. Rieke, K. Y L Su, Christine C. Chen, Charles A. Beichman, Dean C. Hines, Luisa M. Rebull, Tanner Angelle, David E Trilling, Clampin Mark, Gáspár András

Research output: Contribution to journalArticle

54 Citations (Scopus)

Abstract

A debris ring around the star HD 207129 (G0V; d = 16.0 pc) has been imaged in scattered visible light with the ACS coronagraph on the Hubble Space Telescope (HST) and in thermal emission using MIPS on the Spitzer Space Telescope at λ = 70 μ. (resolved) and 160 μ (unresolved). Spitzer IRS (λ, = 7-35 μm) and MIPS (λ = 55-90 μm) spectrographs measured disk emission at A > 28 μm. In the HST image the disk appears as a ∼30 AU wide ring with a mean radius of ∼163 AU and is inclined by 60° from pole-on. At 70 μm, it appears partially resolved and is elongated in the same direction and with nearly the same size as seen with HST in scattered light. At 0.6 μm, the ring shows no significant brightness asymmetry, implying little or no forward scattering by its constituent dust. With a mean surface brightness of V = 23.7 mag arcsec-2, it is the faintest disk imaged to date in scattered light. We model the ring's infrared spectral energy distribution (SED) using a dust population fixed at the location where HST detects the scattered light. The observed SED is well fit by this model, with no requirement for additional unseen debris zones. The firm constraint on the dust radial distance breaks the usual grain size-distance degeneracy that exists in modeling of spatially unresolved disks, and allows us to infer a minimum grain size of ∼2.8 μm and a dust size distribution power-law spectral index of -3.9. An albedo of ∼5% is inferred from the integrated brightness of the ring in scattered light. The low-albedo and isotropic scattering properties are inconsistent with Mie theory for astronomical silicates with the inferred grain size and show the need for further modeling using more complex grain shapes or compositions. Brightness limits are also presented for six other main-sequence stars with strong Spitzer excess around which HST detects no circumstellar nebulosity (HD 10472, HD 21997, HD 38206, HD 82943, HD 113556, and HD 138965).

Original languageEnglish (US)
Pages (from-to)1051-1061
Number of pages11
JournalAstronomical Journal
Volume140
Issue number4
DOIs
StatePublished - Oct 2010

Fingerprint

Hubble Space Telescope
debris
brightness
dust
rings
grain size
spectral energy distribution
albedo
Indian spacecraft
scattering
Space Infrared Telescope Facility
coronagraphs
main sequence stars
Mie theory
Mie scattering
forward scattering
thermal emission
spectrographs
silicates
poles

Keywords

  • Circumstellar matter
  • Stars: Individual (HD 207129, HD 10472, HD 21997, HD 38206, HD 82943, HD 113556, HD 138965, HD 211415)

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Krist, J. E., Stapelfeldt, K. R., Geoffrey, B., Rieke, G. H., Su, K. Y. L., Chen, C. C., ... András, G. (2010). HST and Spitzer observations of the HD 207129 debris ring. Astronomical Journal, 140(4), 1051-1061. https://doi.org/10.1088/0004-6256/140/4/1051

HST and Spitzer observations of the HD 207129 debris ring. / Krist, John E.; Stapelfeldt, Karl R.; Geoffrey, Bryden; Rieke, George H.; Su, K. Y L; Chen, Christine C.; Beichman, Charles A.; Hines, Dean C.; Rebull, Luisa M.; Angelle, Tanner; Trilling, David E; Mark, Clampin; András, Gáspár.

In: Astronomical Journal, Vol. 140, No. 4, 10.2010, p. 1051-1061.

Research output: Contribution to journalArticle

Krist, JE, Stapelfeldt, KR, Geoffrey, B, Rieke, GH, Su, KYL, Chen, CC, Beichman, CA, Hines, DC, Rebull, LM, Angelle, T, Trilling, DE, Mark, C & András, G 2010, 'HST and Spitzer observations of the HD 207129 debris ring', Astronomical Journal, vol. 140, no. 4, pp. 1051-1061. https://doi.org/10.1088/0004-6256/140/4/1051
Krist JE, Stapelfeldt KR, Geoffrey B, Rieke GH, Su KYL, Chen CC et al. HST and Spitzer observations of the HD 207129 debris ring. Astronomical Journal. 2010 Oct;140(4):1051-1061. https://doi.org/10.1088/0004-6256/140/4/1051
Krist, John E. ; Stapelfeldt, Karl R. ; Geoffrey, Bryden ; Rieke, George H. ; Su, K. Y L ; Chen, Christine C. ; Beichman, Charles A. ; Hines, Dean C. ; Rebull, Luisa M. ; Angelle, Tanner ; Trilling, David E ; Mark, Clampin ; András, Gáspár. / HST and Spitzer observations of the HD 207129 debris ring. In: Astronomical Journal. 2010 ; Vol. 140, No. 4. pp. 1051-1061.
@article{73a7f4f80f5b4b7b8fedfd77b89d0887,
title = "HST and Spitzer observations of the HD 207129 debris ring",
abstract = "A debris ring around the star HD 207129 (G0V; d = 16.0 pc) has been imaged in scattered visible light with the ACS coronagraph on the Hubble Space Telescope (HST) and in thermal emission using MIPS on the Spitzer Space Telescope at λ = 70 μ. (resolved) and 160 μ (unresolved). Spitzer IRS (λ, = 7-35 μm) and MIPS (λ = 55-90 μm) spectrographs measured disk emission at A > 28 μm. In the HST image the disk appears as a ∼30 AU wide ring with a mean radius of ∼163 AU and is inclined by 60° from pole-on. At 70 μm, it appears partially resolved and is elongated in the same direction and with nearly the same size as seen with HST in scattered light. At 0.6 μm, the ring shows no significant brightness asymmetry, implying little or no forward scattering by its constituent dust. With a mean surface brightness of V = 23.7 mag arcsec-2, it is the faintest disk imaged to date in scattered light. We model the ring's infrared spectral energy distribution (SED) using a dust population fixed at the location where HST detects the scattered light. The observed SED is well fit by this model, with no requirement for additional unseen debris zones. The firm constraint on the dust radial distance breaks the usual grain size-distance degeneracy that exists in modeling of spatially unresolved disks, and allows us to infer a minimum grain size of ∼2.8 μm and a dust size distribution power-law spectral index of -3.9. An albedo of ∼5{\%} is inferred from the integrated brightness of the ring in scattered light. The low-albedo and isotropic scattering properties are inconsistent with Mie theory for astronomical silicates with the inferred grain size and show the need for further modeling using more complex grain shapes or compositions. Brightness limits are also presented for six other main-sequence stars with strong Spitzer excess around which HST detects no circumstellar nebulosity (HD 10472, HD 21997, HD 38206, HD 82943, HD 113556, and HD 138965).",
keywords = "Circumstellar matter, Stars: Individual (HD 207129, HD 10472, HD 21997, HD 38206, HD 82943, HD 113556, HD 138965, HD 211415)",
author = "Krist, {John E.} and Stapelfeldt, {Karl R.} and Bryden Geoffrey and Rieke, {George H.} and Su, {K. Y L} and Chen, {Christine C.} and Beichman, {Charles A.} and Hines, {Dean C.} and Rebull, {Luisa M.} and Tanner Angelle and Trilling, {David E} and Clampin Mark and G{\'a}sp{\'a}r Andr{\'a}s",
year = "2010",
month = "10",
doi = "10.1088/0004-6256/140/4/1051",
language = "English (US)",
volume = "140",
pages = "1051--1061",
journal = "Astronomical Journal",
issn = "0004-6256",
publisher = "IOP Publishing Ltd.",
number = "4",

}

TY - JOUR

T1 - HST and Spitzer observations of the HD 207129 debris ring

AU - Krist, John E.

AU - Stapelfeldt, Karl R.

AU - Geoffrey, Bryden

AU - Rieke, George H.

AU - Su, K. Y L

AU - Chen, Christine C.

AU - Beichman, Charles A.

AU - Hines, Dean C.

AU - Rebull, Luisa M.

AU - Angelle, Tanner

AU - Trilling, David E

AU - Mark, Clampin

AU - András, Gáspár

PY - 2010/10

Y1 - 2010/10

N2 - A debris ring around the star HD 207129 (G0V; d = 16.0 pc) has been imaged in scattered visible light with the ACS coronagraph on the Hubble Space Telescope (HST) and in thermal emission using MIPS on the Spitzer Space Telescope at λ = 70 μ. (resolved) and 160 μ (unresolved). Spitzer IRS (λ, = 7-35 μm) and MIPS (λ = 55-90 μm) spectrographs measured disk emission at A > 28 μm. In the HST image the disk appears as a ∼30 AU wide ring with a mean radius of ∼163 AU and is inclined by 60° from pole-on. At 70 μm, it appears partially resolved and is elongated in the same direction and with nearly the same size as seen with HST in scattered light. At 0.6 μm, the ring shows no significant brightness asymmetry, implying little or no forward scattering by its constituent dust. With a mean surface brightness of V = 23.7 mag arcsec-2, it is the faintest disk imaged to date in scattered light. We model the ring's infrared spectral energy distribution (SED) using a dust population fixed at the location where HST detects the scattered light. The observed SED is well fit by this model, with no requirement for additional unseen debris zones. The firm constraint on the dust radial distance breaks the usual grain size-distance degeneracy that exists in modeling of spatially unresolved disks, and allows us to infer a minimum grain size of ∼2.8 μm and a dust size distribution power-law spectral index of -3.9. An albedo of ∼5% is inferred from the integrated brightness of the ring in scattered light. The low-albedo and isotropic scattering properties are inconsistent with Mie theory for astronomical silicates with the inferred grain size and show the need for further modeling using more complex grain shapes or compositions. Brightness limits are also presented for six other main-sequence stars with strong Spitzer excess around which HST detects no circumstellar nebulosity (HD 10472, HD 21997, HD 38206, HD 82943, HD 113556, and HD 138965).

AB - A debris ring around the star HD 207129 (G0V; d = 16.0 pc) has been imaged in scattered visible light with the ACS coronagraph on the Hubble Space Telescope (HST) and in thermal emission using MIPS on the Spitzer Space Telescope at λ = 70 μ. (resolved) and 160 μ (unresolved). Spitzer IRS (λ, = 7-35 μm) and MIPS (λ = 55-90 μm) spectrographs measured disk emission at A > 28 μm. In the HST image the disk appears as a ∼30 AU wide ring with a mean radius of ∼163 AU and is inclined by 60° from pole-on. At 70 μm, it appears partially resolved and is elongated in the same direction and with nearly the same size as seen with HST in scattered light. At 0.6 μm, the ring shows no significant brightness asymmetry, implying little or no forward scattering by its constituent dust. With a mean surface brightness of V = 23.7 mag arcsec-2, it is the faintest disk imaged to date in scattered light. We model the ring's infrared spectral energy distribution (SED) using a dust population fixed at the location where HST detects the scattered light. The observed SED is well fit by this model, with no requirement for additional unseen debris zones. The firm constraint on the dust radial distance breaks the usual grain size-distance degeneracy that exists in modeling of spatially unresolved disks, and allows us to infer a minimum grain size of ∼2.8 μm and a dust size distribution power-law spectral index of -3.9. An albedo of ∼5% is inferred from the integrated brightness of the ring in scattered light. The low-albedo and isotropic scattering properties are inconsistent with Mie theory for astronomical silicates with the inferred grain size and show the need for further modeling using more complex grain shapes or compositions. Brightness limits are also presented for six other main-sequence stars with strong Spitzer excess around which HST detects no circumstellar nebulosity (HD 10472, HD 21997, HD 38206, HD 82943, HD 113556, and HD 138965).

KW - Circumstellar matter

KW - Stars: Individual (HD 207129, HD 10472, HD 21997, HD 38206, HD 82943, HD 113556, HD 138965, HD 211415)

UR - http://www.scopus.com/inward/record.url?scp=78049334416&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=78049334416&partnerID=8YFLogxK

U2 - 10.1088/0004-6256/140/4/1051

DO - 10.1088/0004-6256/140/4/1051

M3 - Article

VL - 140

SP - 1051

EP - 1061

JO - Astronomical Journal

JF - Astronomical Journal

SN - 0004-6256

IS - 4

ER -