Dust, Ice, and Gas in Time (DIGIT) Herschel program first results

T. A. Van Kempen; J. D. Green; N. J. Evans; E. F. Van Dishoeck; L. E. Kristensen; G. J. Herczeg; B. Merín; J. E. Lee; J. K. Jørgensen; J. Bouwman; B. Acke; M. Adamkovics; J. C. Augereau; E. Bergin; G. A. Blake; J. M. Brown; J. S. Carr; J. H. Chen; L. Cieza; C. Dominik; C. P. Dullemond; M. M. Dunham; A. Glassgold; M. Güdel; P. M. Harvey; Th Henning; M. R. Hogerheijde; D. Jaffe; H. J. Kim; C. Knez; J. H. Lacy; S. Maret; G. Meeus; R. Meijerink; G. D. Mulders; L. Mundy; J. Najita; J. Olofsson; K. M. Pontoppidan; C. Salyk; B. Sturm; R. Visser; L. B.F.M. Waters; C. Waelkens; U. A. Yildiz

doi:10.1051/0004-6361/201014686

Dust, Ice, and Gas in Time (DIGIT) Herschel program first results

T. A. Van Kempen, J. D. Green, N. J. Evans, E. F. Van Dishoeck, L. E. Kristensen, G. J. Herczeg, B. Merín, J. E. Lee, J. K. Jørgensen, J. Bouwman, B. Acke, M. Adamkovics, J. C. Augereau, E. Bergin, G. A. Blake, J. M. Brown, J. S. Carr, J. H. Chen, L. Cieza, C. DominikC. P. Dullemond, M. M. Dunham, A. Glassgold, M. Güdel, P. M. Harvey, Th Henning, M. R. Hogerheijde, D. Jaffe, H. J. Kim, C. Knez, J. H. Lacy, S. Maret, G. Meeus, R. Meijerink, G. D. Mulders, L. Mundy, J. Najita, J. Olofsson, K. M. Pontoppidan, C. Salyk, B. Sturm, R. Visser, L. B.F.M. Waters, C. Waelkens, U. A. Yildiz

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Abstract

Aims. We aim to study the composition and energetics of the circumstellar material of DK Cha, an intermediate-mass star in transition from an embedded configuration to a star plus disk stage, during this pivotal stage of its evolution. Methods. Using the range scan mode of PACS on the Herschel Space Observatory, we obtained a spectrum of DK Cha from 55 to 210 μm as part of the DIGIT key program. Results. Almost 50 molecular and atomic lines were detected, many more than the 7 lines detected in ISO-LWS. Nearly the entire ladder of CO from J = 14-13 to 38-37 (E_u/k = 4080 K), water from levels as excited as JK_-1K₊₁ = 7₀₇ (E _u/k = 843 K), and OH lines up to E_u/k = 290 K were detected. Conclusions. The continuum emission in our PACS SED scan matches the flux expected by a model consisting of a star, a surrounding disk of 0.03 M _⊙, and an envelope of a similar mass, supporting the suggestion that the object is emerging from its main accretion stage. Molecular, atomic, and ionic emission lines in the far-infrared reveal the outflow's influence on the envelope. The inferred hot gas may be photon-heated, but some emission may be caused by C-shocks in the walls of the outflow cavity.

Original language	English
Article number	L128
Journal	Astronomy and Astrophysics
Volume	518
Issue number	7-8
DOIs	https://doi.org/10.1051/0004-6361/201014686
State	Published - 16 Jul 2010
Externally published	Yes

Keywords

Astrochemistry
Circumstellar matter
Infrared: ISM
Stars: formation
Stars: protostars
Submillimeter: ISM

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10.1051/0004-6361/201014686

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Van Kempen, T. A., Green, J. D., Evans, N. J., Van Dishoeck, E. F., Kristensen, L. E., Herczeg, G. J., Merín, B., Lee, J. E., Jørgensen, J. K., Bouwman, J., Acke, B., Adamkovics, M., Augereau, J. C., Bergin, E., Blake, G. A., Brown, J. M., Carr, J. S., Chen, J. H., Cieza, L., ... Yildiz, U. A. (2010). Dust, Ice, and Gas in Time (DIGIT) Herschel program first results. Astronomy and Astrophysics, 518(7-8), Article L128. https://doi.org/10.1051/0004-6361/201014686

@article{ea0f4e0dd1f9473ba73688cfb491d66f,

title = "Dust, Ice, and Gas in Time (DIGIT) Herschel program first results",

abstract = "Aims. We aim to study the composition and energetics of the circumstellar material of DK Cha, an intermediate-mass star in transition from an embedded configuration to a star plus disk stage, during this pivotal stage of its evolution. Methods. Using the range scan mode of PACS on the Herschel Space Observatory, we obtained a spectrum of DK Cha from 55 to 210 μm as part of the DIGIT key program. Results. Almost 50 molecular and atomic lines were detected, many more than the 7 lines detected in ISO-LWS. Nearly the entire ladder of CO from J = 14-13 to 38-37 (Eu/k = 4080 K), water from levels as excited as JK-1K+1 = 707 (E u/k = 843 K), and OH lines up to Eu/k = 290 K were detected. Conclusions. The continuum emission in our PACS SED scan matches the flux expected by a model consisting of a star, a surrounding disk of 0.03 M ⊙, and an envelope of a similar mass, supporting the suggestion that the object is emerging from its main accretion stage. Molecular, atomic, and ionic emission lines in the far-infrared reveal the outflow's influence on the envelope. The inferred hot gas may be photon-heated, but some emission may be caused by C-shocks in the walls of the outflow cavity.",

keywords = "Astrochemistry, Circumstellar matter, Infrared: ISM, Stars: formation, Stars: protostars, Submillimeter: ISM",

author = "{Van Kempen}, {T. A.} and Green, {J. D.} and Evans, {N. J.} and {Van Dishoeck}, {E. F.} and Kristensen, {L. E.} and Herczeg, {G. J.} and B. Mer{\'i}n and Lee, {J. E.} and J{\o}rgensen, {J. K.} and J. Bouwman and B. Acke and M. Adamkovics and Augereau, {J. C.} and E. Bergin and Blake, {G. A.} and Brown, {J. M.} and Carr, {J. S.} and Chen, {J. H.} and L. Cieza and C. Dominik and Dullemond, {C. P.} and Dunham, {M. M.} and A. Glassgold and M. G{\"u}del and Harvey, {P. M.} and Th Henning and Hogerheijde, {M. R.} and D. Jaffe and Kim, {H. J.} and C. Knez and Lacy, {J. H.} and S. Maret and G. Meeus and R. Meijerink and Mulders, {G. D.} and L. Mundy and J. Najita and J. Olofsson and Pontoppidan, {K. M.} and C. Salyk and B. Sturm and R. Visser and Waters, {L. B.F.M.} and C. Waelkens and Yildiz, {U. A.}",

year = "2010",

month = jul,

day = "16",

doi = "10.1051/0004-6361/201014686",

language = "English",

volume = "518",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

number = "7-8",

}

Van Kempen, TA, Green, JD, Evans, NJ, Van Dishoeck, EF, Kristensen, LE, Herczeg, GJ, Merín, B, Lee, JE, Jørgensen, JK, Bouwman, J, Acke, B, Adamkovics, M, Augereau, JC, Bergin, E, Blake, GA, Brown, JM, Carr, JS, Chen, JH, Cieza, L, Dominik, C, Dullemond, CP, Dunham, MM, Glassgold, A, Güdel, M, Harvey, PM, Henning, T, Hogerheijde, MR, Jaffe, D, Kim, HJ, Knez, C, Lacy, JH, Maret, S, Meeus, G, Meijerink, R, Mulders, GD, Mundy, L, Najita, J, Olofsson, J, Pontoppidan, KM, Salyk, C, Sturm, B, Visser, R, Waters, LBFM, Waelkens, C & Yildiz, UA 2010, 'Dust, Ice, and Gas in Time (DIGIT) Herschel program first results', Astronomy and Astrophysics, vol. 518, no. 7-8, L128. https://doi.org/10.1051/0004-6361/201014686

TY - JOUR

T1 - Dust, Ice, and Gas in Time (DIGIT) Herschel program first results

AU - Van Kempen, T. A.

AU - Green, J. D.

AU - Evans, N. J.

AU - Van Dishoeck, E. F.

AU - Kristensen, L. E.

AU - Herczeg, G. J.

AU - Merín, B.

AU - Lee, J. E.

AU - Jørgensen, J. K.

AU - Bouwman, J.

AU - Acke, B.

AU - Adamkovics, M.

AU - Augereau, J. C.

AU - Bergin, E.

AU - Blake, G. A.

AU - Brown, J. M.

AU - Carr, J. S.

AU - Chen, J. H.

AU - Cieza, L.

AU - Dominik, C.

AU - Dullemond, C. P.

AU - Dunham, M. M.

AU - Glassgold, A.

AU - Güdel, M.

AU - Harvey, P. M.

AU - Henning, Th

AU - Hogerheijde, M. R.

AU - Jaffe, D.

AU - Kim, H. J.

AU - Knez, C.

AU - Lacy, J. H.

AU - Maret, S.

AU - Meeus, G.

AU - Meijerink, R.

AU - Mulders, G. D.

AU - Mundy, L.

AU - Najita, J.

AU - Olofsson, J.

AU - Pontoppidan, K. M.

AU - Salyk, C.

AU - Sturm, B.

AU - Visser, R.

AU - Waters, L. B.F.M.

AU - Waelkens, C.

AU - Yildiz, U. A.

PY - 2010/7/16

Y1 - 2010/7/16

N2 - Aims. We aim to study the composition and energetics of the circumstellar material of DK Cha, an intermediate-mass star in transition from an embedded configuration to a star plus disk stage, during this pivotal stage of its evolution. Methods. Using the range scan mode of PACS on the Herschel Space Observatory, we obtained a spectrum of DK Cha from 55 to 210 μm as part of the DIGIT key program. Results. Almost 50 molecular and atomic lines were detected, many more than the 7 lines detected in ISO-LWS. Nearly the entire ladder of CO from J = 14-13 to 38-37 (Eu/k = 4080 K), water from levels as excited as JK-1K+1 = 707 (E u/k = 843 K), and OH lines up to Eu/k = 290 K were detected. Conclusions. The continuum emission in our PACS SED scan matches the flux expected by a model consisting of a star, a surrounding disk of 0.03 M ⊙, and an envelope of a similar mass, supporting the suggestion that the object is emerging from its main accretion stage. Molecular, atomic, and ionic emission lines in the far-infrared reveal the outflow's influence on the envelope. The inferred hot gas may be photon-heated, but some emission may be caused by C-shocks in the walls of the outflow cavity.

AB - Aims. We aim to study the composition and energetics of the circumstellar material of DK Cha, an intermediate-mass star in transition from an embedded configuration to a star plus disk stage, during this pivotal stage of its evolution. Methods. Using the range scan mode of PACS on the Herschel Space Observatory, we obtained a spectrum of DK Cha from 55 to 210 μm as part of the DIGIT key program. Results. Almost 50 molecular and atomic lines were detected, many more than the 7 lines detected in ISO-LWS. Nearly the entire ladder of CO from J = 14-13 to 38-37 (Eu/k = 4080 K), water from levels as excited as JK-1K+1 = 707 (E u/k = 843 K), and OH lines up to Eu/k = 290 K were detected. Conclusions. The continuum emission in our PACS SED scan matches the flux expected by a model consisting of a star, a surrounding disk of 0.03 M ⊙, and an envelope of a similar mass, supporting the suggestion that the object is emerging from its main accretion stage. Molecular, atomic, and ionic emission lines in the far-infrared reveal the outflow's influence on the envelope. The inferred hot gas may be photon-heated, but some emission may be caused by C-shocks in the walls of the outflow cavity.

KW - Astrochemistry

KW - Circumstellar matter

KW - Infrared: ISM

KW - Stars: formation

KW - Stars: protostars

KW - Submillimeter: ISM

UR - http://www.scopus.com/inward/record.url?scp=77957832407&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/201014686

DO - 10.1051/0004-6361/201014686

M3 - Article

AN - SCOPUS:77957832407

SN - 0004-6361

VL - 518

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

IS - 7-8

M1 - L128

ER -

Dust, Ice, and Gas in Time (DIGIT) Herschel program first results

Abstract

Keywords

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