CO observations of SMGs の履歴(No.4)

• 履歴一覧
• 差分 を表示
• 現在との差分 を表示
• ソース を表示
• CO observations of SMGs へ行く。
  • 1 (2011-08-11 (木) 09:03:15)
  • 2 (2011-08-11 (木) 09:05:04)
  • 3 (2011-08-17 (水) 04:28:05)
  • 4 (2011-08-17 (水) 14:41:14)
  • 5 (2011-08-18 (木) 07:26:59)
  • 6 (2011-08-18 (木) 10:13:31)

CO(1-0) observations of SMGs†

Harris et al., 2010, ApJ, 723, 1139†

http://adsabs.harvard.edu/abs/2010ApJ...723.1139H

• GBT/Zpectrometer observations.

• We report detections of three z ~ 2.5 submillimeter-selected galaxies (SMGs; SMM J14011+0252, SMM J14009+0252, SMM J04431+0210) in the lowest rotational transition of the carbon monoxide molecule (CO J = 1-0) and one nondetection (SMM J04433+0210).

• For the three galaxies we detected, we find a line-integrated brightness temperature ratio of the J = 3-2 and 1-0 lines of 0.68 ± 0.08; the 1-0 line is stronger than predicted by the frequent assumption of equal brightnesses in the two lines and by most single-component models.

Scott et al. 2011, ApJ, 733, 29†

http://adsabs.harvard.edu/abs/2011ApJ...733...29S

• We report on the redshift measurement and CO line excitation of HERMES J105751.1+573027 (HLSW-01), a strongly lensed submillimeter galaxy discovered in Herschel/SPIRE observations as part of the Herschel Multi-tiered Extragalactic Survey (HerMES).

• With the 100 GHz instantaneous bandwidth of the Z-Spec instrument on the Caltech Submillimeter Observatory, we robustly identify a redshift of z = 2.958 ± 0.007 for this source, using the simultaneous detection of four CO emission lines (J = 7 → 6, J = 8 → 7, J = 9 → 8, and J = 10 → 9).

• Combining the measured line fluxes for these high-J transitions with the J = 1 → 0, J = 3 → 2, and J = 5 → 4 line fluxes measured with the Green Bank Telescope, the Combined Array for Research in Millimeter Astronomy, and the Plateau de Bure Interferometer, respectively, we model the physical properties of the molecular gas in this galaxy.

Swinbank et al. 2010, Nature, 464, 733 ††

http://adsabs.harvard.edu/abs/2010Natur.464..733S

• The mid- and far-infrared colours (S24/ S70=0.4 +/- 0.2) and red optical/near-infrared colours also suggest that the galaxy lies beyond the cluster at z>1.5 (ref. 10 and Supplementary Information), and indeed detection of carbon monoxide (CO) J=1–0 emission at 34.64GHz unambiguously identified the redshift as z=2.3259 +/- 0.0001.

Frayer et al. 2011, ApJ, 726, 22†

http://adsabs.harvard.edu/abs/2011ApJ...726L..22F

• The Zpectrometer instrument on the Green Bank Telescope (GBT) was used to measure the redshifts and constrain the masses of the cold molecular gas reservoirs for two candidate high-redshift lensed sources.
• We derive CO(1-0) redshifts of z = 3.042 ± 0.001 and z = 2.625 ± 0.001, and measure molecular gas masses of (1-3) ×1010 M sun, corrected for lens amplification and assuming a conversion factor of α = 0.8 M sun( K km s-1 pc2)-1.