Emission-line galaxies from the NICMOS/Hubble Space Telescope grism parallel survey

Patrick J. McCarthy, Lin Yan, Wolfram Freudling, Harry I. Teplitz, Eliot M. Malumuth, Ray J. Weymann, Matthew A. Malkan, Robert A E Fosbury, Jonathan P. Gardner, Lisa J. Storrie-Lombardi, Rodger I Thompson, Robert E. Williams, Sara R. Heap

Research output: Contribution to journalArticle

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Abstract

We present the first results of a survey of random fields with the slitless G141 (λc = 1.5 μm, ΔλA = 0.8 μm) grism on the near-IR camera and multiobject spectrometer (NICMOS) on board the Hubble Space Telescope (HST). Approximately 64 arcmin2 have been observed at intermediate and high Galactic latitudes. The 3 σ limiting line and continuum fluxes in each field vary from 7.5 × 10-17 to 1 × 10-17 ergs cm-2 s-1, and from H = 20 to 22, respectively. Our median and area-weighted 3 σ limiting line fluxes within a 4 pixel aperture are nearly identical at 4.1 × 10-17 ergs cm-2 s-1 and are 60% deeper than the deepest narrowband imaging surveys from the ground. We have identified 33 emission-line objects and derive their observed wavelengths, fluxes, and equivalent widths. We argue that the most likely line identification is Hα and that the redshift range probed is from 0.75 to 1.9. The 2 σ rest-frame equivalent width limits range from 9 to 130 Å, with an average of 40 Å. The survey probes an effective comoving volume of 105 h-350 Mpc3 for q0 = 0.5. Our derived comoving number density of emission-line galaxies in the range 0.7 < z < 1.9 is 3.3 × 10-4 h350 Mpc-3, very similar to that of the bright Lyman break objects at z ∼ 3. The objects with detected emission lines have a median F160W magnitude of 20.4 (Vega scale) and a median Hα luminosity of 2.7 × 1042 ergs s-1. The implied star formation rates range from 1 to 324 M yr-1 with an average [N II] λλ16583, 6548 corrected rate of 21 M yr-1 for H0 = 50 km s-1 Mpc and q0 = 0.5 (34 M yr-1 for q0 = 0.1).

Original languageEnglish (US)
Pages (from-to)548-563
Number of pages16
JournalAstrophysical Journal
Volume520
Issue number2 PART 1
StatePublished - Aug 1 1999

Fingerprint

Hubble Space Telescope
erg
spectrometer
cameras
spectrometers
galaxies
star formation rate
narrowband
pixel
apertures
pixels
luminosity
probe
continuums
wavelength
probes
wavelengths
rate

Keywords

  • Galaxies: distances and redshifts
  • Galaxies: seyfert
  • Galaxies: statistics
  • Infrared: galaxies
  • Surveys

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

McCarthy, P. J., Yan, L., Freudling, W., Teplitz, H. I., Malumuth, E. M., Weymann, R. J., ... Heap, S. R. (1999). Emission-line galaxies from the NICMOS/Hubble Space Telescope grism parallel survey. Astrophysical Journal, 520(2 PART 1), 548-563.

Emission-line galaxies from the NICMOS/Hubble Space Telescope grism parallel survey. / McCarthy, Patrick J.; Yan, Lin; Freudling, Wolfram; Teplitz, Harry I.; Malumuth, Eliot M.; Weymann, Ray J.; Malkan, Matthew A.; Fosbury, Robert A E; Gardner, Jonathan P.; Storrie-Lombardi, Lisa J.; Thompson, Rodger I; Williams, Robert E.; Heap, Sara R.

In: Astrophysical Journal, Vol. 520, No. 2 PART 1, 01.08.1999, p. 548-563.

Research output: Contribution to journalArticle

McCarthy, PJ, Yan, L, Freudling, W, Teplitz, HI, Malumuth, EM, Weymann, RJ, Malkan, MA, Fosbury, RAE, Gardner, JP, Storrie-Lombardi, LJ, Thompson, RI, Williams, RE & Heap, SR 1999, 'Emission-line galaxies from the NICMOS/Hubble Space Telescope grism parallel survey', Astrophysical Journal, vol. 520, no. 2 PART 1, pp. 548-563.
McCarthy PJ, Yan L, Freudling W, Teplitz HI, Malumuth EM, Weymann RJ et al. Emission-line galaxies from the NICMOS/Hubble Space Telescope grism parallel survey. Astrophysical Journal. 1999 Aug 1;520(2 PART 1):548-563.
McCarthy, Patrick J. ; Yan, Lin ; Freudling, Wolfram ; Teplitz, Harry I. ; Malumuth, Eliot M. ; Weymann, Ray J. ; Malkan, Matthew A. ; Fosbury, Robert A E ; Gardner, Jonathan P. ; Storrie-Lombardi, Lisa J. ; Thompson, Rodger I ; Williams, Robert E. ; Heap, Sara R. / Emission-line galaxies from the NICMOS/Hubble Space Telescope grism parallel survey. In: Astrophysical Journal. 1999 ; Vol. 520, No. 2 PART 1. pp. 548-563.
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abstract = "We present the first results of a survey of random fields with the slitless G141 (λc = 1.5 μm, ΔλA = 0.8 μm) grism on the near-IR camera and multiobject spectrometer (NICMOS) on board the Hubble Space Telescope (HST). Approximately 64 arcmin2 have been observed at intermediate and high Galactic latitudes. The 3 σ limiting line and continuum fluxes in each field vary from 7.5 × 10-17 to 1 × 10-17 ergs cm-2 s-1, and from H = 20 to 22, respectively. Our median and area-weighted 3 σ limiting line fluxes within a 4 pixel aperture are nearly identical at 4.1 × 10-17 ergs cm-2 s-1 and are 60{\%} deeper than the deepest narrowband imaging surveys from the ground. We have identified 33 emission-line objects and derive their observed wavelengths, fluxes, and equivalent widths. We argue that the most likely line identification is Hα and that the redshift range probed is from 0.75 to 1.9. The 2 σ rest-frame equivalent width limits range from 9 to 130 {\AA}, with an average of 40 {\AA}. The survey probes an effective comoving volume of 105 h-350 Mpc3 for q0 = 0.5. Our derived comoving number density of emission-line galaxies in the range 0.7 < z < 1.9 is 3.3 × 10-4 h350 Mpc-3, very similar to that of the bright Lyman break objects at z ∼ 3. The objects with detected emission lines have a median F160W magnitude of 20.4 (Vega scale) and a median Hα luminosity of 2.7 × 1042 ergs s-1. The implied star formation rates range from 1 to 324 M⊙ yr-1 with an average [N II] λλ16583, 6548 corrected rate of 21 M⊙ yr-1 for H0 = 50 km s-1 Mpc and q0 = 0.5 (34 M⊙ yr-1 for q0 = 0.1).",
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AU - McCarthy, Patrick J.

AU - Yan, Lin

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AU - Teplitz, Harry I.

AU - Malumuth, Eliot M.

AU - Weymann, Ray J.

AU - Malkan, Matthew A.

AU - Fosbury, Robert A E

AU - Gardner, Jonathan P.

AU - Storrie-Lombardi, Lisa J.

AU - Thompson, Rodger I

AU - Williams, Robert E.

AU - Heap, Sara R.

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N2 - We present the first results of a survey of random fields with the slitless G141 (λc = 1.5 μm, ΔλA = 0.8 μm) grism on the near-IR camera and multiobject spectrometer (NICMOS) on board the Hubble Space Telescope (HST). Approximately 64 arcmin2 have been observed at intermediate and high Galactic latitudes. The 3 σ limiting line and continuum fluxes in each field vary from 7.5 × 10-17 to 1 × 10-17 ergs cm-2 s-1, and from H = 20 to 22, respectively. Our median and area-weighted 3 σ limiting line fluxes within a 4 pixel aperture are nearly identical at 4.1 × 10-17 ergs cm-2 s-1 and are 60% deeper than the deepest narrowband imaging surveys from the ground. We have identified 33 emission-line objects and derive their observed wavelengths, fluxes, and equivalent widths. We argue that the most likely line identification is Hα and that the redshift range probed is from 0.75 to 1.9. The 2 σ rest-frame equivalent width limits range from 9 to 130 Å, with an average of 40 Å. The survey probes an effective comoving volume of 105 h-350 Mpc3 for q0 = 0.5. Our derived comoving number density of emission-line galaxies in the range 0.7 < z < 1.9 is 3.3 × 10-4 h350 Mpc-3, very similar to that of the bright Lyman break objects at z ∼ 3. The objects with detected emission lines have a median F160W magnitude of 20.4 (Vega scale) and a median Hα luminosity of 2.7 × 1042 ergs s-1. The implied star formation rates range from 1 to 324 M⊙ yr-1 with an average [N II] λλ16583, 6548 corrected rate of 21 M⊙ yr-1 for H0 = 50 km s-1 Mpc and q0 = 0.5 (34 M⊙ yr-1 for q0 = 0.1).

AB - We present the first results of a survey of random fields with the slitless G141 (λc = 1.5 μm, ΔλA = 0.8 μm) grism on the near-IR camera and multiobject spectrometer (NICMOS) on board the Hubble Space Telescope (HST). Approximately 64 arcmin2 have been observed at intermediate and high Galactic latitudes. The 3 σ limiting line and continuum fluxes in each field vary from 7.5 × 10-17 to 1 × 10-17 ergs cm-2 s-1, and from H = 20 to 22, respectively. Our median and area-weighted 3 σ limiting line fluxes within a 4 pixel aperture are nearly identical at 4.1 × 10-17 ergs cm-2 s-1 and are 60% deeper than the deepest narrowband imaging surveys from the ground. We have identified 33 emission-line objects and derive their observed wavelengths, fluxes, and equivalent widths. We argue that the most likely line identification is Hα and that the redshift range probed is from 0.75 to 1.9. The 2 σ rest-frame equivalent width limits range from 9 to 130 Å, with an average of 40 Å. The survey probes an effective comoving volume of 105 h-350 Mpc3 for q0 = 0.5. Our derived comoving number density of emission-line galaxies in the range 0.7 < z < 1.9 is 3.3 × 10-4 h350 Mpc-3, very similar to that of the bright Lyman break objects at z ∼ 3. The objects with detected emission lines have a median F160W magnitude of 20.4 (Vega scale) and a median Hα luminosity of 2.7 × 1042 ergs s-1. The implied star formation rates range from 1 to 324 M⊙ yr-1 with an average [N II] λλ16583, 6548 corrected rate of 21 M⊙ yr-1 for H0 = 50 km s-1 Mpc and q0 = 0.5 (34 M⊙ yr-1 for q0 = 0.1).

KW - Galaxies: distances and redshifts

KW - Galaxies: seyfert

KW - Galaxies: statistics

KW - Infrared: galaxies

KW - Surveys

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