The buried starburst in the interacting galaxy II Zw 096 as revealed by the spitzer space telescope

H. Inami; L. Armus; J. A. Surace; J. M. Mazzarella; A. S. Evans; D. B. Sanders; J. H. Howell; A. Petric; T. Vavilkin; K. Iwasawa; S. Haan; E. J. Murphy; S. Stierwalt; P. N. Appleton; J. E. Barnes; G. Bothun; C. R. Bridge; B. Chan; V. Charmandaris; D. T. Frayer; L. J. Kewley; D. C. Kim; S. Lord; B. F. Madore; J. A. Marshall; H. Matsuhara; J. E. Melbourne; J. Rich; B. Schulz; H. W.W. Spoon; E. Sturm; U.v.; S. Veilleux; K. Xu

doi:10.1088/0004-6256/140/1/63

The buried starburst in the interacting galaxy II Zw 096 as revealed by the spitzer space telescope

H. Inami^*, L. Armus, J. A. Surace, J. M. Mazzarella, A. S. Evans, D. B. Sanders, J. H. Howell, A. Petric, T. Vavilkin, K. Iwasawa, S. Haan, E. J. Murphy, S. Stierwalt, P. N. Appleton, J. E. Barnes, G. Bothun, C. R. Bridge, B. Chan, V. Charmandaris, D. T. FrayerL. J. Kewley, D. C. Kim, S. Lord, B. F. Madore, J. A. Marshall, H. Matsuhara, J. E. Melbourne, J. Rich, B. Schulz, H. W.W. Spoon, E. Sturm, U.v., S. Veilleux, K. Xu

^*Corresponding author for this work

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

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Abstract

An analysis of data from the Spitzer Space Telescope, Hubble Space Telescope, Chandra X-ray Observatory, and AKARI Infrared Astronomy Satellite is presented for the z = 0.036 merging galaxy system II Zw 096 (CGCG 448-020). Because II Zw 096 has an infrared luminosity of log(L_IR/L _⊙) = 11.94, it is classified as a Luminous Infrared Galaxy (LIRG), and was observed as part of the Great Observatories All-sky LIRG Survey (GOALS). The Spitzer data suggest that 80% of the total infrared luminosity comes from an extremely compact, red source not associated with the nuclei of the merging galaxies. The Spitzer mid-infrared spectra indicate no high-ionization lines from a buried active galactic nucleus in this source. The strong detection of the 3.3 μm and 6.2 μm polycyclic aromatic hydrocarbon emission features in the AKARI and Spitzer spectra also implies that the energy source of II Zw 096 is a starburst. Based on Spitzer infrared imaging and AKARI near-infrared spectroscopy, the star formation rate is estimated to be 120 M_⊙ yr^-1 and >45 M_⊙ yr ^-1, respectively. Finally, the high-resolution B-, I-, and H-band images show many star clusters in the interacting system. The colors of these clusters suggest at least two populations - one with an age of 1-5Myr and one with an age of 20-500Myr, reddened by 0-2 mag of visual extinction. The masses of these clusters span a range between 10⁶ and 10⁸ M _⊙. This starburst source is reminiscent of the extranuclear starburst seen in NGC4038/9 (the Antennae Galaxies) and Arp 299 but approximately an order of magnitude more luminous than the Antennae. The source is remarkable in that the off-nuclear infrared luminosity dominates the entire system.

Original language	English
Pages (from-to)	63-74
Number of pages	12
Journal	Astronomical Journal
Volume	140
Issue number	1
DOIs	https://doi.org/10.1088/0004-6256/140/1/63
Publication status	Published - 2010
Externally published	Yes

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10.1088/0004-6256/140/1/63

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Inami, H., Armus, L., Surace, J. A., Mazzarella, J. M., Evans, A. S., Sanders, D. B., Howell, J. H., Petric, A., Vavilkin, T., Iwasawa, K., Haan, S., Murphy, E. J., Stierwalt, S., Appleton, P. N., Barnes, J. E., Bothun, G., Bridge, C. R., Chan, B., Charmandaris, V., ... Xu, K. (2010). The buried starburst in the interacting galaxy II Zw 096 as revealed by the spitzer space telescope. Astronomical Journal, 140(1), 63-74. https://doi.org/10.1088/0004-6256/140/1/63

@article{6a05c1c6cebf4cc9bcd73c065e0e5f13,

title = "The buried starburst in the interacting galaxy II Zw 096 as revealed by the spitzer space telescope",

abstract = "An analysis of data from the Spitzer Space Telescope, Hubble Space Telescope, Chandra X-ray Observatory, and AKARI Infrared Astronomy Satellite is presented for the z = 0.036 merging galaxy system II Zw 096 (CGCG 448-020). Because II Zw 096 has an infrared luminosity of log(LIR/L ⊙) = 11.94, it is classified as a Luminous Infrared Galaxy (LIRG), and was observed as part of the Great Observatories All-sky LIRG Survey (GOALS). The Spitzer data suggest that 80% of the total infrared luminosity comes from an extremely compact, red source not associated with the nuclei of the merging galaxies. The Spitzer mid-infrared spectra indicate no high-ionization lines from a buried active galactic nucleus in this source. The strong detection of the 3.3 μm and 6.2 μm polycyclic aromatic hydrocarbon emission features in the AKARI and Spitzer spectra also implies that the energy source of II Zw 096 is a starburst. Based on Spitzer infrared imaging and AKARI near-infrared spectroscopy, the star formation rate is estimated to be 120 M⊙ yr-1 and >45 M⊙ yr -1, respectively. Finally, the high-resolution B-, I-, and H-band images show many star clusters in the interacting system. The colors of these clusters suggest at least two populations - one with an age of 1-5Myr and one with an age of 20-500Myr, reddened by 0-2 mag of visual extinction. The masses of these clusters span a range between 106 and 108 M ⊙. This starburst source is reminiscent of the extranuclear starburst seen in NGC4038/9 (the Antennae Galaxies) and Arp 299 but approximately an order of magnitude more luminous than the Antennae. The source is remarkable in that the off-nuclear infrared luminosity dominates the entire system.",

keywords = "Galaxies: individual (II Zw 096), Galaxies: interactions, Galaxies: star clusters: general, Galaxies: starburst, Infrared: galaxies",

author = "H. Inami and L. Armus and Surace, {J. A.} and Mazzarella, {J. M.} and Evans, {A. S.} and Sanders, {D. B.} and Howell, {J. H.} and A. Petric and T. Vavilkin and K. Iwasawa and S. Haan and Murphy, {E. J.} and S. Stierwalt and Appleton, {P. N.} and Barnes, {J. E.} and G. Bothun and Bridge, {C. R.} and B. Chan and V. Charmandaris and Frayer, {D. T.} and Kewley, {L. J.} and Kim, {D. C.} and S. Lord and Madore, {B. F.} and Marshall, {J. A.} and H. Matsuhara and Melbourne, {J. E.} and J. Rich and B. Schulz and Spoon, {H. W.W.} and E. Sturm and U.v. and S. Veilleux and K. Xu",

year = "2010",

doi = "10.1088/0004-6256/140/1/63",

language = "English",

volume = "140",

pages = "63--74",

journal = "Astronomical Journal",

issn = "0004-6256",

publisher = "American Astronomical Society",

number = "1",

}

Inami, H, Armus, L, Surace, JA, Mazzarella, JM, Evans, AS, Sanders, DB, Howell, JH, Petric, A, Vavilkin, T, Iwasawa, K, Haan, S, Murphy, EJ, Stierwalt, S, Appleton, PN, Barnes, JE, Bothun, G, Bridge, CR, Chan, B, Charmandaris, V, Frayer, DT, Kewley, LJ, Kim, DC, Lord, S, Madore, BF, Marshall, JA, Matsuhara, H, Melbourne, JE, Rich, J, Schulz, B, Spoon, HWW, Sturm, E, U.v., Veilleux, S & Xu, K 2010, 'The buried starburst in the interacting galaxy II Zw 096 as revealed by the spitzer space telescope', Astronomical Journal, vol. 140, no. 1, pp. 63-74. https://doi.org/10.1088/0004-6256/140/1/63

TY - JOUR

T1 - The buried starburst in the interacting galaxy II Zw 096 as revealed by the spitzer space telescope

AU - Inami, H.

AU - Armus, L.

AU - Surace, J. A.

AU - Mazzarella, J. M.

AU - Evans, A. S.

AU - Sanders, D. B.

AU - Howell, J. H.

AU - Petric, A.

AU - Vavilkin, T.

AU - Iwasawa, K.

AU - Haan, S.

AU - Murphy, E. J.

AU - Stierwalt, S.

AU - Appleton, P. N.

AU - Barnes, J. E.

AU - Bothun, G.

AU - Bridge, C. R.

AU - Chan, B.

AU - Charmandaris, V.

AU - Frayer, D. T.

AU - Kewley, L. J.

AU - Kim, D. C.

AU - Lord, S.

AU - Madore, B. F.

AU - Marshall, J. A.

AU - Matsuhara, H.

AU - Melbourne, J. E.

AU - Rich, J.

AU - Schulz, B.

AU - Spoon, H. W.W.

AU - Sturm, E.

AU - U.v.,

AU - Veilleux, S.

AU - Xu, K.

PY - 2010

Y1 - 2010

N2 - An analysis of data from the Spitzer Space Telescope, Hubble Space Telescope, Chandra X-ray Observatory, and AKARI Infrared Astronomy Satellite is presented for the z = 0.036 merging galaxy system II Zw 096 (CGCG 448-020). Because II Zw 096 has an infrared luminosity of log(LIR/L ⊙) = 11.94, it is classified as a Luminous Infrared Galaxy (LIRG), and was observed as part of the Great Observatories All-sky LIRG Survey (GOALS). The Spitzer data suggest that 80% of the total infrared luminosity comes from an extremely compact, red source not associated with the nuclei of the merging galaxies. The Spitzer mid-infrared spectra indicate no high-ionization lines from a buried active galactic nucleus in this source. The strong detection of the 3.3 μm and 6.2 μm polycyclic aromatic hydrocarbon emission features in the AKARI and Spitzer spectra also implies that the energy source of II Zw 096 is a starburst. Based on Spitzer infrared imaging and AKARI near-infrared spectroscopy, the star formation rate is estimated to be 120 M⊙ yr-1 and >45 M⊙ yr -1, respectively. Finally, the high-resolution B-, I-, and H-band images show many star clusters in the interacting system. The colors of these clusters suggest at least two populations - one with an age of 1-5Myr and one with an age of 20-500Myr, reddened by 0-2 mag of visual extinction. The masses of these clusters span a range between 106 and 108 M ⊙. This starburst source is reminiscent of the extranuclear starburst seen in NGC4038/9 (the Antennae Galaxies) and Arp 299 but approximately an order of magnitude more luminous than the Antennae. The source is remarkable in that the off-nuclear infrared luminosity dominates the entire system.

AB - An analysis of data from the Spitzer Space Telescope, Hubble Space Telescope, Chandra X-ray Observatory, and AKARI Infrared Astronomy Satellite is presented for the z = 0.036 merging galaxy system II Zw 096 (CGCG 448-020). Because II Zw 096 has an infrared luminosity of log(LIR/L ⊙) = 11.94, it is classified as a Luminous Infrared Galaxy (LIRG), and was observed as part of the Great Observatories All-sky LIRG Survey (GOALS). The Spitzer data suggest that 80% of the total infrared luminosity comes from an extremely compact, red source not associated with the nuclei of the merging galaxies. The Spitzer mid-infrared spectra indicate no high-ionization lines from a buried active galactic nucleus in this source. The strong detection of the 3.3 μm and 6.2 μm polycyclic aromatic hydrocarbon emission features in the AKARI and Spitzer spectra also implies that the energy source of II Zw 096 is a starburst. Based on Spitzer infrared imaging and AKARI near-infrared spectroscopy, the star formation rate is estimated to be 120 M⊙ yr-1 and >45 M⊙ yr -1, respectively. Finally, the high-resolution B-, I-, and H-band images show many star clusters in the interacting system. The colors of these clusters suggest at least two populations - one with an age of 1-5Myr and one with an age of 20-500Myr, reddened by 0-2 mag of visual extinction. The masses of these clusters span a range between 106 and 108 M ⊙. This starburst source is reminiscent of the extranuclear starburst seen in NGC4038/9 (the Antennae Galaxies) and Arp 299 but approximately an order of magnitude more luminous than the Antennae. The source is remarkable in that the off-nuclear infrared luminosity dominates the entire system.

KW - Galaxies: individual (II Zw 096)

KW - Galaxies: interactions

KW - Galaxies: star clusters: general

KW - Galaxies: starburst

KW - Infrared: galaxies

UR - http://www.scopus.com/inward/record.url?scp=77953488388&partnerID=8YFLogxK

U2 - 10.1088/0004-6256/140/1/63

DO - 10.1088/0004-6256/140/1/63

M3 - Article

SN - 0004-6256

VL - 140

SP - 63

EP - 74

JO - Astronomical Journal

JF - Astronomical Journal

IS - 1

ER -

The buried starburst in the interacting galaxy II Zw 096 as revealed by the spitzer space telescope

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