Relations With Co Rotational Ladders of Galaxies Across the Herschel Spire Archive

Kamenetzky, J.; Rangwala, Naseem; Glenn, J.; Maloney, Philip R.; Conley, A.

doi:10.3847/0004-637x/829/2/93

Cited by 137 publications

(232 citation statements)

References 60 publications

Supporting

Mentioning

211

Contrasting

Order By: Relevance

“…For the J = 8 − 7 transition the conversion factor is relatively unconstrained, e.g., R 8,1 = 0.9 (Bradford et al 2009), R 8,1 = 0.01 − 0.4 (Danielson et al 2013;Kamenetzky et al 2016). Here we adopt a conservative value of R 8,1 = 0.30±0.20, where the more sub-thermally excited is the gas (R 8,1 ≪ 1), or the lower is the ISM density, the higher is the gas mass (see e.g., Daddi et al 2015).…”

Section: Co-based Measurementmentioning

confidence: 99%

Spatially Resolved Kinematics in the Central 1 kpc of a Compact Star-forming Galaxy at z ∼ 2.3 from ALMA CO Observations

Barro

Kriek

Pérez‐González

et al. 2017

ApJL

View full text Add to dashboard Cite

We present high spatial resolution (FWHM∼0.′′ 14) observations of the CO(8 − 7) line in GDS-14876, a compact star-forming galaxy at z = 2.3 with total stellar mass of log(M ⋆ /M ⊙ )= 10.9. The spatially resolved velocity map of the inner r 1 kpc reveals a continous velocity gradient consistent with the kinematics of a rotating disk with v rot (r = 1kpc) = 163 ± 5 km s −1 and v rot /σ ∼ 2.5. The gas-tostellar ratios estimated from CO(8 − 7) and the dust continuum emission span a broad range, f CO gas = M gas /M ⋆ = 13 − 45% and f cont gas = 50 − 67%, but are nonetheless consistent given the uncertainties in the conversion factors. The dynamical modeling yields a dynamical mass of log(M dyn /M ⊙ )= 10.58which is lower, but still consistent with the baryonic mass, log(M bar =M ⋆ + M CO gas /M ⊙ )= 11.0, if the smallest CO-based gas fraction is assumed. Despite a low, overall gas fraction, the small physical extent of the dense, star-forming gas probed by CO(8 − 7), ∼ 3× smaller than the stellar size, implies a strong relative concentration that increases the gas fraction up to f CO,1kpc gas ∼ 85% in the central 1 kpc. Such a gas-rich center, coupled with a high star-formation rate, SFR∼ 500 M ⊙ yr −1 , suggests that GDS-14876 is quickly assembling a dense stellar component (bulge) in a strong nuclear starburst. Assuming its gas reservoir is depleted without replenishment, GDS-14876 will quickly (t depl ∼ 27 Myr) become a compact quiescent galaxy that could retain some fraction of the observed rotational support.

show abstract

Section: Co-based Measurementmentioning

confidence: 99%

Spatially Resolved Kinematics in the Central 1 kpc of a Compact Star-forming Galaxy at z ∼ 2.3 from ALMA CO Observations

Barro

Kriek

Pérez‐González

et al. 2017

ApJL

View full text Add to dashboard Cite

show abstract

“…For comparison, we have also included a sample of local galaxies observed with Herschel/SPIRE, presented by Kamenetzky et al (2016). The ratio L [CI](1−0) /L FIR is an approximate (but non-linear) tracer of the UV field strength, while the ratio…”

Section: The [Ci]-co and [Ci]-l(fir) Line Ratiomentioning

confidence: 99%

“…Here we use a combination of line ratios in order to compare the conditions within our DSFGs with both the DSFGs presented by Alaghband-Zadeh et al (2013), and a sample of local (z < 0.05) galaxies. For our local sample, we use a sample observed with the Herschel/SPIRE Fourier Transform Spectrometer (FTS), presented by Kamenetzky et al (2016). The sample as presented is a compilation of all extragalactic proposals listed in the Herschel Science Archive (HSA) with at least one reported FTS line measurement or upper limit.…”

Section: The [Ci]-co and [Ci]-l(fir) Line Ratiomentioning

confidence: 99%

“…It must be noted that both of these ratios are non-linear with the physical conditions they trace: a more rigorous treatment of line ratios tracing physical conditions is presented in §4 below. We have converted the 40 − 120µm FIR luminosities given by Kamenetzky et al (2016) into 8 − 1000µm luminosities (to match our DSFG samples) by multiplying by a factor of 1.9, following Eq. 4 in Elbaz et al (2002).…”

Section: The [Ci]-co and [Ci]-l(fir) Line Ratiomentioning

confidence: 99%

See 1 more Smart Citation

ALMA observations of atomic carbon inz ∼ 4 dusty star-forming galaxies

Bothwell

Aguirre

Aravena

et al. 2016

Mon. Not. R. Astron. Soc.

134

180

View full text Add to dashboard Cite

We present ALMA [Ci](1−0) (rest frequency 492 GHz) observations for a sample of 13 strongly-lensed dusty star-forming galaxies originally discovered at 1.4mm in a blankfield survey by the South Pole Telescope. We compare these new data with available [Ci] observations from the literature, allowing a study of the ISM properties of ∼ 30 extreme dusty star-forming galaxies spanning a redshift range 2 < z < 5. Using the [Ci] line as a tracer of the molecular ISM, we find a mean molecular gas mass for SPTDSFGs of 6.6 × 10 10 M . This is in tension with gas masses derived via low-J 12 CO and dust masses; bringing the estimates into accordance requires either (a) an elevated CO-to-H 2 conversion factor for our sample of α CO ∼ 2.5 and a gas-to-dust ratio ∼ 200, or (b) an high carbon abundance X CI ∼ 7 × 10 −5 . Using observations of a range of additional atomic and molecular lines (including [Ci], [Cii], and multiple transitions of CO), we use a modern Photodissociation Region code (3d-pdr) to assess the physical conditions (including the density, UV radiation field strength, and gas temperature) within the ISM of the DSFGs in our sample. We find that the ISM within our DSFGs is characterised by dense gas permeated by strong UV fields. We note that previous efforts to characterise PDR regions in DSFGs may have significantly under-estimated the density of the ISM. Combined, our analysis suggests that the ISM of extreme dusty starbursts at high redshift consists of dense, carbon-rich gas not directly comparable to the ISM of starbursts in the local Universe.

show abstract

“…An extensive CO spectral atlas of extragalactic objects has also been published in Kamenetsky et al (2016). In Section 2, we introduce the source sample and describe the Herschel observations.…”

Section: Introductionmentioning

confidence: 99%

HERUS: A CO ATLAS FROM SPIRE SPECTROSCOPY OF LOCAL ULIRGs

Pearson¹,

Rigopoulou²,

Hurley³

et al. 2016

ApJS

View full text Add to dashboard Cite

We present the Herschel SPIRE Fourier Transform Spectroscopy (FTS) atlas for a complete flux-limited sample of local ultraluminous infrared galaxies (ULIRGs) as part of the HERschel Ultra Luminous InfraRed Galaxy Survey (HERUS). The data reduction is described in detail and was optimized for faint FTS sources ,with particular care being taken for the subtraction of the background, which dominates the continuum shape of the spectra. To improve the final spectra, special treatment in the data reduction has been given to any observation suffering from artifacts in the data caused by anomalous instrumental effects. Complete spectra are shown covering 200-671 μm, with photometry in the SPIRE bands at 250, 350, and 500 μm. The spectra include near complete CO ladders for over half of our sample, as well as fine structure lines from [C I] 370 μm, [C I] 609 μm, and [N II] 205 μm. We also detect H 2 O lines in several objects. We construct CO spectral line energy distributions (SLEDs) for the sample, and compare their slopes with the far-infrared (FIR) colors and luminosities. We show that the CO SLEDs of ULIRGs can be broadly grouped into three classes based on their excitation. We find that the mid-J (5<J<8) lines are better correlated with the total FIR luminosity, suggesting that the warm gas component is closely linked to recent star formation. The higher J transitions do not linearly correlate with the FIR luminosity, consistent with them originating in hotter, denser gas that is unconnected to the current star formation. We conclude that in most cases more than one temperature component is required to model the CO SLEDs.

show abstract

Relations With Co Rotational Ladders of Galaxies Across the Herschel Spire Archive

Cited by 137 publications

References 60 publications

Spatially Resolved Kinematics in the Central 1 kpc of a Compact Star-forming Galaxy at z ∼ 2.3 from ALMA CO Observations

Spatially Resolved Kinematics in the Central 1 kpc of a Compact Star-forming Galaxy at z ∼ 2.3 from ALMA CO Observations

ALMA observations of atomic carbon inz ∼ 4 dusty star-forming galaxies

HERUS: A CO ATLAS FROM SPIRE SPECTROSCOPY OF LOCAL ULIRGs

Contact Info

Product

Resources

About