University of Hertfordshire

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From the same journal

By the same authors

A low H I column density filament in NGC 2403: signature of interaction or accretion

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A low H I column density filament in NGC 2403 : signature of interaction or accretion. / de Blok, W.J.G.; Keating, K.M.; Pisano, D.J.; Fraternali, F.; Walter, F.; Oosterloo, T.; Brinks, E.; Bigiel, F.; Leroy, A.

In: Astronomy and Astrophysics, Vol. 569, A68, 25.09.2014.

Research output: Contribution to journalArticlepeer-review

Harvard

de Blok, WJG, Keating, KM, Pisano, DJ, Fraternali, F, Walter, F, Oosterloo, T, Brinks, E, Bigiel, F & Leroy, A 2014, 'A low H I column density filament in NGC 2403: signature of interaction or accretion', Astronomy and Astrophysics, vol. 569, A68. https://doi.org/10.1051/0004-6361/201423880

APA

de Blok, W. J. G., Keating, K. M., Pisano, D. J., Fraternali, F., Walter, F., Oosterloo, T., Brinks, E., Bigiel, F., & Leroy, A. (2014). A low H I column density filament in NGC 2403: signature of interaction or accretion. Astronomy and Astrophysics, 569, [A68]. https://doi.org/10.1051/0004-6361/201423880

Vancouver

de Blok WJG, Keating KM, Pisano DJ, Fraternali F, Walter F, Oosterloo T et al. A low H I column density filament in NGC 2403: signature of interaction or accretion. Astronomy and Astrophysics. 2014 Sep 25;569. A68. https://doi.org/10.1051/0004-6361/201423880

Author

de Blok, W.J.G. ; Keating, K.M. ; Pisano, D.J. ; Fraternali, F. ; Walter, F. ; Oosterloo, T. ; Brinks, E. ; Bigiel, F. ; Leroy, A. / A low H I column density filament in NGC 2403 : signature of interaction or accretion. In: Astronomy and Astrophysics. 2014 ; Vol. 569.

Bibtex

@article{32a03544d18643a4b782dac6f8715983,
title = "A low H I column density filament in NGC 2403: signature of interaction or accretion",
abstract = "Observed H i accretion around nearby galaxies can only account for a fraction of the gas supply needed to sustain the currently observed star formation rates. It is possible that additional accretion occurs in the form of low column density cold flows, as predicted by numerical simulations of galaxy formation. To constrain the presence and properties of such flows, we present deep H i observations obtained with the NRAO Green Bank Telescope of an area measuring 4° × 4° around NGC 2403. These observations, with a 5σ detection limit of 2.4 × 1018 cm-2 over a 20 km s-1 linewidth, reveal a low column density, extended cloud outside the main H i disk, about 17′ (~ 16 kpc or ~ 2 R25) to the NW of the center of the galaxy. The total H i mass of the cloud is 6.3 × 106 M⊙, or 0.15 percent of the total H i mass of NGC 2403. The cloud is associated with an 8 kpc anomalous-velocity H i filament in the inner disk, that was previously observed in deep VLA observations. We discuss several scenarios for the origin of the cloud, and conclude that it is either accreting from the intergalactic medium, or is the result of a minor interaction with a neigboring dwarf galaxy",
keywords = "galaxies: ISM, galaxies: kinematics and dynamics, galaxies: halos, galaxies: individual: NGC 2403, galaxies: structure",
author = "{de Blok}, W.J.G. and K.M. Keating and D.J. Pisano and F. Fraternali and F. Walter and T. Oosterloo and E. Brinks and F. Bigiel and A. Leroy",
note = "Date of acceptance: 12/07/2014",
year = "2014",
month = sep,
day = "25",
doi = "10.1051/0004-6361/201423880",
language = "English",
volume = "569",
journal = "Astronomy & Astrophysics",
issn = "0004-6361",
publisher = "EDP Sciences",

}

RIS

TY - JOUR

T1 - A low H I column density filament in NGC 2403

T2 - signature of interaction or accretion

AU - de Blok, W.J.G.

AU - Keating, K.M.

AU - Pisano, D.J.

AU - Fraternali, F.

AU - Walter, F.

AU - Oosterloo, T.

AU - Brinks, E.

AU - Bigiel, F.

AU - Leroy, A.

N1 - Date of acceptance: 12/07/2014

PY - 2014/9/25

Y1 - 2014/9/25

N2 - Observed H i accretion around nearby galaxies can only account for a fraction of the gas supply needed to sustain the currently observed star formation rates. It is possible that additional accretion occurs in the form of low column density cold flows, as predicted by numerical simulations of galaxy formation. To constrain the presence and properties of such flows, we present deep H i observations obtained with the NRAO Green Bank Telescope of an area measuring 4° × 4° around NGC 2403. These observations, with a 5σ detection limit of 2.4 × 1018 cm-2 over a 20 km s-1 linewidth, reveal a low column density, extended cloud outside the main H i disk, about 17′ (~ 16 kpc or ~ 2 R25) to the NW of the center of the galaxy. The total H i mass of the cloud is 6.3 × 106 M⊙, or 0.15 percent of the total H i mass of NGC 2403. The cloud is associated with an 8 kpc anomalous-velocity H i filament in the inner disk, that was previously observed in deep VLA observations. We discuss several scenarios for the origin of the cloud, and conclude that it is either accreting from the intergalactic medium, or is the result of a minor interaction with a neigboring dwarf galaxy

AB - Observed H i accretion around nearby galaxies can only account for a fraction of the gas supply needed to sustain the currently observed star formation rates. It is possible that additional accretion occurs in the form of low column density cold flows, as predicted by numerical simulations of galaxy formation. To constrain the presence and properties of such flows, we present deep H i observations obtained with the NRAO Green Bank Telescope of an area measuring 4° × 4° around NGC 2403. These observations, with a 5σ detection limit of 2.4 × 1018 cm-2 over a 20 km s-1 linewidth, reveal a low column density, extended cloud outside the main H i disk, about 17′ (~ 16 kpc or ~ 2 R25) to the NW of the center of the galaxy. The total H i mass of the cloud is 6.3 × 106 M⊙, or 0.15 percent of the total H i mass of NGC 2403. The cloud is associated with an 8 kpc anomalous-velocity H i filament in the inner disk, that was previously observed in deep VLA observations. We discuss several scenarios for the origin of the cloud, and conclude that it is either accreting from the intergalactic medium, or is the result of a minor interaction with a neigboring dwarf galaxy

KW - galaxies: ISM, galaxies: kinematics and dynamics, galaxies: halos, galaxies: individual: NGC 2403, galaxies: structure

U2 - 10.1051/0004-6361/201423880

DO - 10.1051/0004-6361/201423880

M3 - Article

VL - 569

JO - Astronomy & Astrophysics

JF - Astronomy & Astrophysics

SN - 0004-6361

M1 - A68

ER -