Copious amounts of hot and cold dust orbiting the main sequence A-type stars HD 131488 and HD 121191

Carl Melis; B. Zuckerman; Joseph H. Rhee; Inseok Song; Simon J. Murphy; Michael S. Bessell

doi:10.1088/0004-637X/778/1/12

Copious amounts of hot and cold dust orbiting the main sequence A-type stars HD 131488 and HD 121191

Carl Melis, B. Zuckerman, Joseph H. Rhee, Inseok Song, Simon J. Murphy, Michael S. Bessell

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Abstract

We report two new dramatically dusty main sequence stars: HD 131488 (A1 V) and HD 121191 (A8 V). HD 131488 is found to have substantial amounts of dust in its terrestrial planet zone (L _IR/L _bol ≈ 4 × 10^-3), cooler dust farther out in its planetary system, and an unusual mid-infrared spectral feature. HD 121191 shows terrestrial planet zone dust (L _IR/L _bol ≈ 2.3 × 10^-3), hints of cooler dust, and shares the unusual mid-infrared spectral shape identified in HD 131488. These two stars belong to sub-groups of the Scorpius-Centaurus OB association and have ages of ∼10 Myr. HD 131488 and HD 121191 are the dustiest main sequence A-type stars currently known. Early-type stars that host substantial inner planetary system dust are thus far found only within the age range of 5-20 Myr.

Original language	English
Article number	12
Journal	Astrophysical Journal
Volume	778
Issue number	1
DOIs	https://doi.org/10.1088/0004-637X/778/1/12
Publication status	Published - 20 Nov 2013

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10.1088/0004-637X/778/1/12

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title = "Copious amounts of hot and cold dust orbiting the main sequence A-type stars HD 131488 and HD 121191",

abstract = "We report two new dramatically dusty main sequence stars: HD 131488 (A1 V) and HD 121191 (A8 V). HD 131488 is found to have substantial amounts of dust in its terrestrial planet zone (L IR/L bol ≈ 4 × 10-3), cooler dust farther out in its planetary system, and an unusual mid-infrared spectral feature. HD 121191 shows terrestrial planet zone dust (L IR/L bol ≈ 2.3 × 10-3), hints of cooler dust, and shares the unusual mid-infrared spectral shape identified in HD 131488. These two stars belong to sub-groups of the Scorpius-Centaurus OB association and have ages of ∼10 Myr. HD 131488 and HD 121191 are the dustiest main sequence A-type stars currently known. Early-type stars that host substantial inner planetary system dust are thus far found only within the age range of 5-20 Myr.",

keywords = "circumstellar matter, infrared: planetary systems, planets and satellites: formation, stars: individual (HD 131488, HD 121191), stars: kinematics and dynamics",

author = "Carl Melis and B. Zuckerman and Rhee, {Joseph H.} and Inseok Song and Murphy, {Simon J.} and Bessell, {Michael S.}",

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doi = "10.1088/0004-637X/778/1/12",

language = "English",

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T1 - Copious amounts of hot and cold dust orbiting the main sequence A-type stars HD 131488 and HD 121191

AU - Melis, Carl

AU - Zuckerman, B.

AU - Rhee, Joseph H.

AU - Song, Inseok

AU - Murphy, Simon J.

AU - Bessell, Michael S.

PY - 2013/11/20

Y1 - 2013/11/20

N2 - We report two new dramatically dusty main sequence stars: HD 131488 (A1 V) and HD 121191 (A8 V). HD 131488 is found to have substantial amounts of dust in its terrestrial planet zone (L IR/L bol ≈ 4 × 10-3), cooler dust farther out in its planetary system, and an unusual mid-infrared spectral feature. HD 121191 shows terrestrial planet zone dust (L IR/L bol ≈ 2.3 × 10-3), hints of cooler dust, and shares the unusual mid-infrared spectral shape identified in HD 131488. These two stars belong to sub-groups of the Scorpius-Centaurus OB association and have ages of ∼10 Myr. HD 131488 and HD 121191 are the dustiest main sequence A-type stars currently known. Early-type stars that host substantial inner planetary system dust are thus far found only within the age range of 5-20 Myr.

AB - We report two new dramatically dusty main sequence stars: HD 131488 (A1 V) and HD 121191 (A8 V). HD 131488 is found to have substantial amounts of dust in its terrestrial planet zone (L IR/L bol ≈ 4 × 10-3), cooler dust farther out in its planetary system, and an unusual mid-infrared spectral feature. HD 121191 shows terrestrial planet zone dust (L IR/L bol ≈ 2.3 × 10-3), hints of cooler dust, and shares the unusual mid-infrared spectral shape identified in HD 131488. These two stars belong to sub-groups of the Scorpius-Centaurus OB association and have ages of ∼10 Myr. HD 131488 and HD 121191 are the dustiest main sequence A-type stars currently known. Early-type stars that host substantial inner planetary system dust are thus far found only within the age range of 5-20 Myr.

KW - circumstellar matter

KW - infrared: planetary systems

KW - planets and satellites: formation

KW - stars: individual (HD 131488, HD 121191)

KW - stars: kinematics and dynamics

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U2 - 10.1088/0004-637X/778/1/12

DO - 10.1088/0004-637X/778/1/12

M3 - Article

SN - 0004-637X

VL - 778

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

M1 - 12

ER -

Copious amounts of hot and cold dust orbiting the main sequence A-type stars HD 131488 and HD 121191

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