The moth: An unusual circumstellar structure associated with HD 61005

Dean C. Hines; Glenn Schneider; David Hollenbach; Eric E. Mamajek; Lynne A. Hillenbrand; Stanimir A. Metchev; Michael R. Meyer; John M. Carpenter; Amaya Moro-Martín; Murray D. Silverstone; K. I.M. Jinyoung Serena; Thomas Henning; Jeroen Bouwman; Sebastian Wolf

doi:10.1086/525016

The moth: An unusual circumstellar structure associated with HD 61005

Dean C. Hines
, Glenn Schneider
, David Hollenbach
, Eric E. Mamajek
, Lynne A. Hillenbrand
, Stanimir A. Metchev
, Michael R. Meyer
, John M. Carpenter
, Amaya Moro-Martín
, Murray D. Silverstone
, K. I.M. Jinyoung Serena
, Thomas Henning
, Jeroen Bouwman
, Sebastian Wolf

Steward Observatory

Research output: Contribution to journal › Article › peer-review

76 Scopus citations

Abstract

We present the discovery of an unusual spatially resolved circumstellar structure associated with the »90 Myr, nearby, G dwarf star HD 61005. Observations from the FEPS Spitzer Legacy Science survey reveal thermal emission in excess of expected stellar photospheric levels. Follow-up 0.1" resolution HST NICMOS coronagraphic images reveal scattered starlight <7" (~240 AU) from the occulted star (1.1 μm flux density =18 ± 3.3 mJy; and 0.77% ± 0.16% of the starlight). The extremely high near-IR scattering fraction and IR excess luminosity f = L_IR/L., « 2 × 10^-3 suggests scattering particle sizes of order a≤ 1.1 μm/2π ~ 0.2 μm, comparable to the blowout size (a « 0.3 μm) due to radiation pressure from the star. Dust-scattered starlight is traced inward to an instrumental limit of ~10 AU. The structure exhibits a strong asymmetry about its morphological major axis but is mirror-symmetric about its minor axis.

Original language	English (US)
Pages (from-to)	L165-L168
Journal	Astrophysical Journal
Volume	671
Issue number	2 PART 2
DOIs	https://doi.org/10.1086/525016
State	Published - 2007

Keywords

Circumstellar matter -infrared
Individual (HD 61005)
Protoplanetary disks - Stars
Stars -planetary systems

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

Access to Document

10.1086/525016

Cite this

Hines, D. C., Schneider, G., Hollenbach, D., Mamajek, E. E., Hillenbrand, L. A., Metchev, S. A., Meyer, M. R., Carpenter, J. M., Moro-Martín, A., Silverstone, M. D., Jinyoung Serena, K. I. M., Henning, T., Bouwman, J., & Wolf, S. (2007). The moth: An unusual circumstellar structure associated with HD 61005. Astrophysical Journal, 671(2 PART 2), L165-L168. https://doi.org/10.1086/525016

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title = "The moth: An unusual circumstellar structure associated with HD 61005",

abstract = "We present the discovery of an unusual spatially resolved circumstellar structure associated with the »90 Myr, nearby, G dwarf star HD 61005. Observations from the FEPS Spitzer Legacy Science survey reveal thermal emission in excess of expected stellar photospheric levels. Follow-up 0.1{"} resolution HST NICMOS coronagraphic images reveal scattered starlight <7{"} (\textasciitilde{}240 AU) from the occulted star (1.1 μm flux density =18 ± 3.3 mJy; and 0.77\% ± 0.16\% of the starlight). The extremely high near-IR scattering fraction and IR excess luminosity f = LIR/L., « 2 × 10-3 suggests scattering particle sizes of order a≤ 1.1 μm/2π \textasciitilde{} 0.2 μm, comparable to the blowout size (a « 0.3 μm) due to radiation pressure from the star. Dust-scattered starlight is traced inward to an instrumental limit of \textasciitilde{}10 AU. The structure exhibits a strong asymmetry about its morphological major axis but is mirror-symmetric about its minor axis.",

keywords = "Circumstellar matter -infrared, Individual (HD 61005), Protoplanetary disks - Stars, Stars -planetary systems",

author = "Hines, \{Dean C.\} and Glenn Schneider and David Hollenbach and Mamajek, \{Eric E.\} and Hillenbrand, \{Lynne A.\} and Metchev, \{Stanimir A.\} and Meyer, \{Michael R.\} and Carpenter, \{John M.\} and Amaya Moro-Mart{\'i}n and Silverstone, \{Murray D.\} and \{Jinyoung Serena\}, \{K. I.M.\} and Thomas Henning and Jeroen Bouwman and Sebastian Wolf",

year = "2007",

doi = "10.1086/525016",

language = "English (US)",

volume = "671",

pages = "L165--L168",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

number = "2 PART 2",

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TY - JOUR

T1 - The moth

T2 - An unusual circumstellar structure associated with HD 61005

AU - Hines, Dean C.

AU - Schneider, Glenn

AU - Hollenbach, David

AU - Mamajek, Eric E.

AU - Hillenbrand, Lynne A.

AU - Metchev, Stanimir A.

AU - Meyer, Michael R.

AU - Carpenter, John M.

AU - Moro-Martín, Amaya

AU - Silverstone, Murray D.

AU - Jinyoung Serena, K. I.M.

AU - Henning, Thomas

AU - Bouwman, Jeroen

AU - Wolf, Sebastian

PY - 2007

Y1 - 2007

N2 - We present the discovery of an unusual spatially resolved circumstellar structure associated with the »90 Myr, nearby, G dwarf star HD 61005. Observations from the FEPS Spitzer Legacy Science survey reveal thermal emission in excess of expected stellar photospheric levels. Follow-up 0.1" resolution HST NICMOS coronagraphic images reveal scattered starlight <7" (~240 AU) from the occulted star (1.1 μm flux density =18 ± 3.3 mJy; and 0.77% ± 0.16% of the starlight). The extremely high near-IR scattering fraction and IR excess luminosity f = LIR/L., « 2 × 10-3 suggests scattering particle sizes of order a≤ 1.1 μm/2π ~ 0.2 μm, comparable to the blowout size (a « 0.3 μm) due to radiation pressure from the star. Dust-scattered starlight is traced inward to an instrumental limit of ~10 AU. The structure exhibits a strong asymmetry about its morphological major axis but is mirror-symmetric about its minor axis.

AB - We present the discovery of an unusual spatially resolved circumstellar structure associated with the »90 Myr, nearby, G dwarf star HD 61005. Observations from the FEPS Spitzer Legacy Science survey reveal thermal emission in excess of expected stellar photospheric levels. Follow-up 0.1" resolution HST NICMOS coronagraphic images reveal scattered starlight <7" (~240 AU) from the occulted star (1.1 μm flux density =18 ± 3.3 mJy; and 0.77% ± 0.16% of the starlight). The extremely high near-IR scattering fraction and IR excess luminosity f = LIR/L., « 2 × 10-3 suggests scattering particle sizes of order a≤ 1.1 μm/2π ~ 0.2 μm, comparable to the blowout size (a « 0.3 μm) due to radiation pressure from the star. Dust-scattered starlight is traced inward to an instrumental limit of ~10 AU. The structure exhibits a strong asymmetry about its morphological major axis but is mirror-symmetric about its minor axis.

KW - Circumstellar matter -infrared

KW - Individual (HD 61005)

KW - Protoplanetary disks - Stars

KW - Stars -planetary systems

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U2 - 10.1086/525016

DO - 10.1086/525016

M3 - Article

AN - SCOPUS:42549154849

SN - 0004-637X

VL - 671

SP - L165-L168

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2 PART 2

ER -

The moth: An unusual circumstellar structure associated with HD 61005

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Keywords

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