ISOPHOT 170 μm Serendipity Sky Survey: The First Galaxy Catalogue

Stickel, M.; Lemke, D.; Klaas, U.; Hotzel, S.; Tóth, L. V.; Kessler, Martin; Laureijs, R. J.; Burgdorf, M.; Beichman, C. A.; Rowan-Robinson, M.; Efstathiou, Andeas; Bogun, S.; Richter, G. M.; Braun, M.

doi:10.1007/3-540-45553-1_32

Cited by 14 publications

(38 citation statements)

References 2 publications

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“…This is quite consistent with D estimated by Alton et al (1998). Stickel et al (2000) also claim that the median value of the dust-to-gas mass ratios of sample galaxies of ISOPHOT 170 µm Serendipity Survey (Bogun et al 1996) is about 4 × 10 −3 . Thus, our estimation of D is reasonable.…”

Section: Effect Of F On Galactic Scalementioning

confidence: 97%

Effect of Dust Extinction on Estimating the Star Formation Rate of Galaxies: Lyman Continuum Extinction

Inoue

Hirashita

Kamaya

2001

ApJ

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We reexamine the effect of Lyman continuum (λ ≤ 912Å) extinction (LCE) by dust in H ii regions in detail and discuss how it affects the estimation of the global star formation rate (SFR) of galaxies. To clarify the first issue, we establish two independent methods for estimating a parameter of LCE (f), which is defined as the fraction of Lyman continuum photons contributing to hydrogen ionization in an H ii region. One of those methods determines f from the set of Lyman continuum flux, electron density and metallicity. In the framework of this method, as the metallicity and/or the Lyman photon flux increase, f is found to decrease. The other method determines f from the ratio of infrared flux to Lyman continuum flux. Importantly, we show that f 0.5 via both methods in many H ii regions of the Galaxy. Thus, it establishes that dust in such H ii regions absorbs significant amount of Lyman continuum photons directly. To examine the second issue, we approximate f to a function of only the dust-togas mass ratio (i.e., metallicity), assuming a parameter fit for the Galactic H ii regions. We find that a characteristicf , which is defined as f averaged over a galaxy-wide scale, is 0.3 for the nearby spiral galaxies. This relatively smallf indicates that a typical increment factor due to LCE for estimating the global SFR (1/f) is large (∼ 3) for the nearby spiral galaxies. Therefore, we conclude that the effect of LCE is not negligible relative to other uncertainties of estimating the SFR of galaxies.

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Section: Effect Of F On Galactic Scalementioning

confidence: 97%

Effect of Dust Extinction on Estimating the Star Formation Rate of Galaxies: Lyman Continuum Extinction

Inoue

Hirashita

Kamaya

2001

ApJ

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“…Clearly, we find that the correction factor increases as dust-to-gas ratio increases. For nearby spiral galaxies, their dust-to-gas ratios distribute around the Galactic value (Alton et al 1998;Stickel et al 2000, see also Paper I). Indeed, even the starburst galaxies (e.g., M82) and the ultra-luminous IR (ULIR) galaxies (e.g., Arp 220) are likely to have about the Galactic dust-to-gas ratio (Krügel, Steppe, & Chini 1990;Lisenfeld, Isaak, & Hills 2000).…”

Section: Effect Of Lce On Estimating Sfrmentioning

confidence: 99%

Lyman Continuum Extinction by Dust in H [CSC]ii[/CSC] Regions of Galaxies

Inoue

2001

The Astronomical Journal

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We examine Lyman continuum extinction (LCE) in H II regions by comparing infrared fluxes of 49 H II regions in the Galaxy, M31, M33, and the LMC with estimated production rates of Lyman continuum photons. A typical fraction of Lyman continuum photons that contribute to hydrogen ionization in the H II regions of three spiral galaxies is 50 %. The fraction may become smaller as the metallicity (or dust-to-gas ratio) increases. We examine the LCE effect on estimated star formation rates (SFR) of galaxies. The correction factor for the Galactic dust-to-gas ratio is 2-5.

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“…The cold dust component is most prominent in the most "quiescent" galaxies, like those contained in the IVCD sample, where the cold dust temperatures were found to be broadly distributed, with a median of 18 K (Popescu et al [73]), some 8 − 10 K lower than would have been predicted by IRAS. The corresponding dust masses were correspondingly found to be increased by factors of typically 2 − 10 (Stickel et al [81]) for the Serendipity Sample and by factors 6 − 13 (Popescu et al [73]) for the IVCD sample, with respect to previous IRAS determinations. As a consequence, the derived gas-to-dust ratios are much closer to the canonical value of ∼ 160 for the Milky Way (Stickel et al [81], Contursi et al [15]; see also Haas et al [34] for M 31), but with a broad distribution of values (Popescu et al [73]).…”

Section: The Fir Spectral Energy Distribution: Dust Temperatures Mass...mentioning

confidence: 75%

“…The corresponding dust masses were correspondingly found to be increased by factors of typically 2 − 10 (Stickel et al [81]) for the Serendipity Sample and by factors 6 − 13 (Popescu et al [73]) for the IVCD sample, with respect to previous IRAS determinations. As a consequence, the derived gas-to-dust ratios are much closer to the canonical value of ∼ 160 for the Milky Way (Stickel et al [81], Contursi et al [15]; see also Haas et al [34] for M 31), but with a broad distribution of values (Popescu et al [73]).…”

Section: The Fir Spectral Energy Distribution: Dust Temperatures Mass...mentioning

confidence: 75%

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Normal Gas-Rich Galaxies in the Far-Infrared: The Legacy of ISOPHOT

Tuffs

Popescu

2005

AIP Conference Proceedings

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Following on from IRAS, the ISOPHOT instrument on board the Infrared Space Observatory (ISO) has provided a huge advancement in our knowledge of the phenomenology of the far-infrared (FIR) emission of normal galaxies and the underlying physical processes. Highlights include: the discovery of an extended cold dust emission component, present in all types of gas-rich galaxies and carrying the bulk of the dust luminosity; the definitive characterisation of the spectral energy distribution in the FIR, revealing the channels through which stars power the FIR light; the derivation of realistic geometries for stars and dust from ISOPHOT imaging and the discovery of cold dust associated with HI extending beyond the optical body of galaxies

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ISOPHOT 170 μm Serendipity Sky Survey: The First Galaxy Catalogue

Cited by 14 publications

References 2 publications

Effect of Dust Extinction on Estimating the Star Formation Rate of Galaxies: Lyman Continuum Extinction

Effect of Dust Extinction on Estimating the Star Formation Rate of Galaxies: Lyman Continuum Extinction

Lyman Continuum Extinction by Dust in H [CSC]ii[/CSC] Regions of Galaxies

Normal Gas-Rich Galaxies in the Far-Infrared: The Legacy of ISOPHOT

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