A redshift z≈5.4 lyα emitting galaxy with linear morphology in the GRAPES/Hubble ultra deep field

James E. Rhoads, Nino Panagia, Rogier Windhorst, Sangeeta Malhotra, Norbert Pirzkal, Chun Xu, Louis Gregory Strolger, Louis E. Bergeron, Emanuele Daddi, Harry Ferguson, Jonathan P. Gardner, Caryl Gronwall, Zoltan Haiman, Anton Koekemoer, Martin Kümmel, Leonidas A. Moustakas, Anna Pasquali, Adam Riess, Sperello Di Serego Alighieri, Massimo StiavelliZlatan Tsvetanov, Joel Vernet, Jeremy Walsh, Haojing Yan

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

We have discovered an extended Lyα plume (UDF 5225) associated with a compact source at redshift z ≈ 5.4 in slitless spectroscopic data from the Grism ACS Program for Extragalactic Science (GRAPES) project. The spatial extent of the emission is about 6×1.5 kpc (1'' × 0''25). Combining our grism data and the broadband images from the Hubble Ultra Deep Field (UDF) images, we find a Lyα line flux of ∼2.2×10-17 ergs cm-2 s-1 and surface brightness ∼7× 10 -17ergs cm-2 s-1 arcsec-2. The UDF images show diffuse continuum emission associated with UDF 5225, including three embedded knots. The morphology of UDF 5225 is highly suggestive of a galaxy in assembly. It is possible that the prominent Lyα emission from this object is due to an active nucleus, and that we are seeing the simultaneous growth through accretion of a galaxy and its central black hole. Follow-up observations at higher spectral resolution could test this hypothesis.

Original languageEnglish (US)
Pages (from-to)582-586
Number of pages5
JournalAstrophysical Journal
Volume621
Issue number2 I
DOIs
StatePublished - Mar 10 2005

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galaxies
spectral resolution
erg
plumes
brightness
plume
assembly
accretion
continuums
broadband
nuclei
high resolution
programme
science
test
project

Keywords

  • Galaxies: frmation
  • Galaxies: hgh-redshift
  • Galaxies: Individual (UDF 5225)
  • Galaxies: Interactions
  • Galaxies: sarburst

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

A redshift z≈5.4 lyα emitting galaxy with linear morphology in the GRAPES/Hubble ultra deep field. / Rhoads, James E.; Panagia, Nino; Windhorst, Rogier; Malhotra, Sangeeta; Pirzkal, Norbert; Xu, Chun; Strolger, Louis Gregory; Bergeron, Louis E.; Daddi, Emanuele; Ferguson, Harry; Gardner, Jonathan P.; Gronwall, Caryl; Haiman, Zoltan; Koekemoer, Anton; Kümmel, Martin; Moustakas, Leonidas A.; Pasquali, Anna; Riess, Adam; Di Serego Alighieri, Sperello; Stiavelli, Massimo; Tsvetanov, Zlatan; Vernet, Joel; Walsh, Jeremy; Yan, Haojing.

In: Astrophysical Journal, Vol. 621, No. 2 I, 10.03.2005, p. 582-586.

Research output: Contribution to journalArticle

Rhoads, JE, Panagia, N, Windhorst, R, Malhotra, S, Pirzkal, N, Xu, C, Strolger, LG, Bergeron, LE, Daddi, E, Ferguson, H, Gardner, JP, Gronwall, C, Haiman, Z, Koekemoer, A, Kümmel, M, Moustakas, LA, Pasquali, A, Riess, A, Di Serego Alighieri, S, Stiavelli, M, Tsvetanov, Z, Vernet, J, Walsh, J & Yan, H 2005, 'A redshift z≈5.4 lyα emitting galaxy with linear morphology in the GRAPES/Hubble ultra deep field', Astrophysical Journal, vol. 621, no. 2 I, pp. 582-586. https://doi.org/10.1086/427622
Rhoads, James E. ; Panagia, Nino ; Windhorst, Rogier ; Malhotra, Sangeeta ; Pirzkal, Norbert ; Xu, Chun ; Strolger, Louis Gregory ; Bergeron, Louis E. ; Daddi, Emanuele ; Ferguson, Harry ; Gardner, Jonathan P. ; Gronwall, Caryl ; Haiman, Zoltan ; Koekemoer, Anton ; Kümmel, Martin ; Moustakas, Leonidas A. ; Pasquali, Anna ; Riess, Adam ; Di Serego Alighieri, Sperello ; Stiavelli, Massimo ; Tsvetanov, Zlatan ; Vernet, Joel ; Walsh, Jeremy ; Yan, Haojing. / A redshift z≈5.4 lyα emitting galaxy with linear morphology in the GRAPES/Hubble ultra deep field. In: Astrophysical Journal. 2005 ; Vol. 621, No. 2 I. pp. 582-586.
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AU - Rhoads, James E.

AU - Panagia, Nino

AU - Windhorst, Rogier

AU - Malhotra, Sangeeta

AU - Pirzkal, Norbert

AU - Xu, Chun

AU - Strolger, Louis Gregory

AU - Bergeron, Louis E.

AU - Daddi, Emanuele

AU - Ferguson, Harry

AU - Gardner, Jonathan P.

AU - Gronwall, Caryl

AU - Haiman, Zoltan

AU - Koekemoer, Anton

AU - Kümmel, Martin

AU - Moustakas, Leonidas A.

AU - Pasquali, Anna

AU - Riess, Adam

AU - Di Serego Alighieri, Sperello

AU - Stiavelli, Massimo

AU - Tsvetanov, Zlatan

AU - Vernet, Joel

AU - Walsh, Jeremy

AU - Yan, Haojing

PY - 2005/3/10

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N2 - We have discovered an extended Lyα plume (UDF 5225) associated with a compact source at redshift z ≈ 5.4 in slitless spectroscopic data from the Grism ACS Program for Extragalactic Science (GRAPES) project. The spatial extent of the emission is about 6×1.5 kpc (1'' × 0''25). Combining our grism data and the broadband images from the Hubble Ultra Deep Field (UDF) images, we find a Lyα line flux of ∼2.2×10-17 ergs cm-2 s-1 and surface brightness ∼7× 10 -17ergs cm-2 s-1 arcsec-2. The UDF images show diffuse continuum emission associated with UDF 5225, including three embedded knots. The morphology of UDF 5225 is highly suggestive of a galaxy in assembly. It is possible that the prominent Lyα emission from this object is due to an active nucleus, and that we are seeing the simultaneous growth through accretion of a galaxy and its central black hole. Follow-up observations at higher spectral resolution could test this hypothesis.

AB - We have discovered an extended Lyα plume (UDF 5225) associated with a compact source at redshift z ≈ 5.4 in slitless spectroscopic data from the Grism ACS Program for Extragalactic Science (GRAPES) project. The spatial extent of the emission is about 6×1.5 kpc (1'' × 0''25). Combining our grism data and the broadband images from the Hubble Ultra Deep Field (UDF) images, we find a Lyα line flux of ∼2.2×10-17 ergs cm-2 s-1 and surface brightness ∼7× 10 -17ergs cm-2 s-1 arcsec-2. The UDF images show diffuse continuum emission associated with UDF 5225, including three embedded knots. The morphology of UDF 5225 is highly suggestive of a galaxy in assembly. It is possible that the prominent Lyα emission from this object is due to an active nucleus, and that we are seeing the simultaneous growth through accretion of a galaxy and its central black hole. Follow-up observations at higher spectral resolution could test this hypothesis.

KW - Galaxies: frmation

KW - Galaxies: hgh-redshift

KW - Galaxies: Individual (UDF 5225)

KW - Galaxies: Interactions

KW - Galaxies: sarburst

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