List of the Lepidoptera of boreal America

Smith, John B.; Skinner, Henry

doi:10.5962/bhl.title.1883

Cited by 7 publications

(22 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Smith et al (2011a) estimate the completeness of the H-ATLAS sample as a function of redshift by calculating the total number of sources that we would expect to have a counterpart above the SDSS magnitude limit in H-ATLAS; we refer the reader to Smith et al (2011a) and Dunne et al (2011) for further details. Smith et al (2011b) find that at z < 0.35 the r-band selection does not bias our sample towards less obscured sources. Since the majority of our spirals and ETGs lie at redshifts less than this, our sample should be representative of the low-redshift galaxy population.…”

Section: O B S E Rvat I O N S a N D S A M P L E S E L E C T I O Nmentioning

confidence: 63%

“…There are 115 and 199 sources for which we have PACS 100 and 160 µm point-source detections at ≥5σ , respectively. The selection effects arising from the PACS detections are discussed in Smith et al (2011b), who found that the SED results in Section 3 are not significantly influenced by the inclusion of upper limits for PACS data in the majority of the sample. All sources are detected at 250 μm at ≥5σ (which is a requirement for our sample selection), 272 sources have a ≥5σ detection at 350 µm and 138 sources have a ≥3σ detection at 500 µm.…”

Section: H-atlas Samplementioning

confidence: 99%

“…Therefore, the size of the random sample is smaller than the H-ATLAS sample, but this should not affect any of our conclusions. Smith et al (2011b) fit the UV-submillimetre SEDs of 1404 H-ATLAS galaxies with reliability >0.8 of being associated with an optical counterpart in the SDSS r-band catalogue, and which have available multiwavelength photometry. Using the physically motivated method of da Cunha, Charlot & Elbaz (2008, hereafter DCE08) allows us to recover the physical properties of these galaxies.…”

Section: Control Samplementioning

confidence: 99%

“…This method ensures that possible degeneracies between model parameters are included in the final probability density function (PDF) of each parameter. The effects of individual wavebands on the derived parameters are explored in DCE08 and Smith et al (2011b), but we emphasize the importance of using the H-ATLAS FIR-submillimetre data to sample the peak of the dust emission and the Rayleigh-Jeans slope in order to get reliable constraints on the dust mass.…”

Section: Sed Fittingmentioning

confidence: 99%

“…Hawarden et al 1981;Sadler & Gerhard 1985;van Dokkum & Franx 1995), yet it is difficult to estimate the total dust mass purely from optical observations. Warm dust (>30 K) was detected in 12 per cent of local ETGs by IRAS (Bregman et al 1998), but IRAS was less sensitive to the cold dust component which dominates the dust mass in local galaxies (Dunne & Eales 2001;Vlahakis, Dunne & Eales 2005;Smith et al 2011b). There have been few studies of ETGs at FIR-submillimetre wavelengths to date, since surveys conducted at these wavelengths have been limited in areal coverage.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Herschel★-ATLAS/GAMA: dusty early-type galaxies and passive spirals

Rowlands¹,

Dunne²,

Maddox³

et al. 2011

Monthly Notices of the Royal Astronomical Society

111

124

View full text Add to dashboard Cite

We present the dust properties and star formation histories of local submillimetre‐selected galaxies, classified by optical morphology. Most of the galaxies are late types and very few are early types. The early‐type galaxies (ETGs) that are detected contain as much dust as typical spirals, and form a unique sample that has been blindly selected at submillimetre wavelengths. Additionally, we investigate the properties of the most passive, dusty spirals. We morphologically classify 1087 galaxies detected in the Herschel‐Astrophysical Terahertz Large Area Survey (H‐ATLAS) Science Demonstration Phase data. Comparing to a control sample of optically selected galaxies, we find 5.5 per cent of luminous ETGs are detected in H‐ATLAS. The H‐ATLAS ETGs contain a significant mass of cold dust: the mean dust mass is 5.5 × 107 M⊙, with individual galaxies ranging from 9 × 105 to 4 × 108 M⊙. This is comparable to that of spiral galaxies in our sample, and is an order of magnitude more dust than that found for the control early‐types, which have a median dust mass inferred from stacking of (0.8–4.0) × 106 M⊙ for a cold dust temperature of 25–15 K. The early‐types detected in H‐ATLAS tend to have bluer NUV − r colours, higher specific star formation rates and younger stellar populations than early‐types which are optically selected, and may be transitioning from the blue cloud to the red sequence. We also find that H‐ATLAS and control early‐types inhabit similar low‐density environments. We investigate whether the observed dust in H‐ATLAS early‐types is from evolved stars, or has been acquired from external sources through interactions and mergers. We conclude that the dust in H‐ATLAS and control ETGs cannot be solely from stellar sources, and a large contribution from dust formed in the interstellar medium or external sources is required. Alternatively, dust destruction may not be as efficient as predicted. We also explore the properties of the most passive spiral galaxies in our sample with specific star formation rate (SSFR) < 10−11 yr−1. We find these passive spirals have lower dust‐to‐stellar mass ratios, higher stellar masses and older stellar population ages than normal spirals. The passive spirals inhabit low‐density environments similar to those of the normal spiral galaxies in our sample. This shows that the processes which turn spirals passive do not occur solely in the intermediate‐density environments of group and cluster outskirts.

show abstract

Section: O B S E Rvat I O N S a N D S A M P L E S E L E C T I O Nmentioning

confidence: 63%

Section: H-atlas Samplementioning

confidence: 99%

Section: Control Samplementioning

confidence: 99%

Section: Sed Fittingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Herschel★-ATLAS/GAMA: dusty early-type galaxies and passive spirals

Rowlands¹,

Dunne²,

Maddox³

et al. 2011

Monthly Notices of the Royal Astronomical Society

111

124

View full text Add to dashboard Cite

show abstract

HERSCHEL-ATLAS GALAXY COUNTS AND HIGH-REDSHIFT LUMINOSITY FUNCTIONS: THE FORMATION OF MASSIVE EARLY-TYPE GALAXIES

Lapi

González‐Nuevo

Fan

et al. 2011

ApJ

172

237

View full text Add to dashboard Cite

Exploiting the H-ATLAS Science Demonstration Phase (SDP) survey data, we have determined the luminosity functions (LFs) at rest-frame wavelengths of 100 and 250 µm and at several redshifts z 1, for bright sub-mm galaxies with star formation rates (SFR) 100 M ⊙ yr −1 . We find that the evolution of the comoving LF is strong up to z ≈ 2.5, and slows down at higher redshifts. From the LFs and the information on halo masses inferred from clustering analysis, we derived an average relation between SFR and halo mass (and its scatter). We also infer that the timescale of the main episode of dust-enshrouded star formation in massive halos (M H 3 × 10 12 M ⊙ ) amounts to ∼ 7 × 10 8 yr. Given the SFRs, which are in the range 10 2 − 10 3 M ⊙ yr −1 , this timescale implies final stellar masses of order of 10 11 − 10 12 M ⊙ . The corresponding stellar mass function matches the observed mass function of passively evolving galaxies at z 1. The comparison of the statistics for sub-mm and UV selected galaxies suggests that the dust-free, UV bright phase, is 10 2 times shorter than the sub-mm bright phase, implying that the dust must form soon after the onset of star formation. Using a single reference Spectral Energy Distribution (SED; the one of the z ≈ 2.3 galaxy SMM J2135-0102), our simple physical model is able to reproduce not only the LFs at different redshifts > 1 but also the counts at wavelengths ranging from 250 µm to ≈ 1 mm. Owing to the steepness of the counts and their relatively broad frequency range, this result suggests that the dispersion of sub-mm SEDs of z > 1 galaxies around the reference one is rather small.

show abstract

GOODS-HERSCHEL: IMPACT OF ACTIVE GALACTIC NUCLEI AND STAR FORMATION ACTIVITY ON INFRARED SPECTRAL ENERGY DISTRIBUTIONS AT HIGH REDSHIFT

Kirkpatrick¹,

Pope²,

Alexander

et al. 2012

ApJ

164

214

View full text Add to dashboard Cite

We explore the effects of active galactic nuclei (AGN) and star formation activity on the infrared (0.3 -1000 µm) spectral energy distributions of luminous infrared galaxies from z = 0.5 to 4.0. We have compiled a large sample of 151 galaxies selected at 24 µm (S 24 100 µJy) in the GOODS-N and ECDFS fields for which we have deep Spitzer IRS spectroscopy, allowing us to decompose the mid-IR spectrum into contributions from star formation and AGN activity. A significant portion (∼ 25%) of our sample is dominated by an AGN (> 50% of mid-IR luminosity) in the mid-IR. Based on the mid-IR classification, we divide our full sample into four sub-samples: z ∼ 1 starforming (SF) sources; z ∼ 2 SF sources; AGN with clear 9.7 µm silicate absorption; and AGN with featureless mid-IR spectra. From our large spectroscopic sample and wealth of multi-wavelength data, including deep Herschel imaging at 100, 160, 250, 350, and 500 µm, we use 95 galaxies with complete spectral coverage to create a composite spectral energy distribution (SED) for each sub-sample. We then fit a two-temperature component modified blackbody to the SEDs. We find that the IR SEDs have similar cold dust temperatures, regardless of the mid-IR power source, but display a marked difference in the warmer dust temperatures. We calculate the average effective temperature of the dust in each sub-sample and find a significant (∼ 20 K) difference between the SF and AGN systems. We compare our composite SEDs to local templates and find that local templates do not accurately reproduce the mid-IR features and dust temperatures of our high redshift systems. High redshift IR luminous galaxies contain significantly more cool dust than their local counterparts. We find that a full suite of photometry spanning the IR peak is necessary to accurately account for the dominant dust temperature components in high redshift IR luminous galaxies.

show abstract

List of the Lepidoptera of boreal America

Abstract: a strigosa Bates.Ceratinia Fabr.3 lycaste Fabr. a negreta Reak.

Cited by 7 publications

References 0 publications

Herschel★-ATLAS/GAMA: dusty early-type galaxies and passive spirals

Herschel★-ATLAS/GAMA: dusty early-type galaxies and passive spirals

HERSCHEL-ATLAS GALAXY COUNTS AND HIGH-REDSHIFT LUMINOSITY FUNCTIONS: THE FORMATION OF MASSIVE EARLY-TYPE GALAXIES

GOODS-HERSCHEL: IMPACT OF ACTIVE GALACTIC NUCLEI AND STAR FORMATION ACTIVITY ON INFRARED SPECTRAL ENERGY DISTRIBUTIONS AT HIGH REDSHIFT

Contact Info

Product

Resources

About