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A Virgo Environmental Survey Tracing Ionised Gas Emission (VESTIGE): IV. A tail of ionised gas in the merger remnant NGC4424
A. Boselli
1, *
M. Fossati
*
G. Consolandi
2, *
P. Amram
1
C. Ge
M. Sun
J. P. Anderson
S. Boissier
1
M. Boquien
V. Buat
1
D. Burgarella
1
L. Cortese
P. Côté
J. C. Cuillandre
3
P. Durrell
B. Epinat
1
L. Ferrarese
M. Fumagalli
4
L. Galbany
G. Gavazzi
J. A. Gómez-López
1
S. Gwyn
G. Hensler
H. Kuncarayakti
M. Marcelin
1
C. Mendes de Oliveira
B. C. Quint
J. Roediger
Y. Roehlly
S. F. Sanchez
5, 6, 7
R. Sanchez-Janssen
E. Toloba
G. Trinchieri
8
B. Vollmer
9
*
Corresponding author
A. Boselli 1
Correspondent author
M. Fossati
Correspondent author
G. Consolandi 2
Correspondent author
P. Amram 1
Author
G. Trinchieri 8
Author
B. Vollmer 9
Author
1
LAM - Laboratoire d'Astrophysique de Marseille (Pôle de l'Étoile Site de Château-Gombert 38, rue Frédéric Joliot-Curie 13388 Marseille cedex 13 - France)
- AMU - Aix Marseille Université : UMR7326 (Aix-Marseille Université Jardins du Pharo 58 Boulevard Charles Livon 13284 Marseille cedex 7 - France)
- INSU - CNRS - Institut national des sciences de l'Univers (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- CNES - Centre National d'Études Spatiales [Toulouse] : UMR7326 (18 avenue Edouard Belin 31401 Toulouse - France)
- CNRS - Centre National de la Recherche Scientifique : UMR7326 (France)
2
UNIMIB - Università degli Studi di Milano-Bicocca [Milano] (Piazza dell'Ateneo Nuovo, 1 - 20126, Milano - Italy)
3
AIM (UMR_7158 / UMR_E_9005 / UM_112) - Astrophysique Interprétation Modélisation (AIM - UMR 7158 - UMR E 9005,
ex "Astrophysique Interactions Multi-échelles",
Service d'astrophysique,
CEA/Saclay,
Orme des Merisiers
F-91191 GIF SUR YVETTE CEDEX - France)
- CNRS - Centre National de la Recherche Scientifique : UMR_7158 (France)
- INSU - CNRS - Institut national des sciences de l'Univers (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- CEA - Commissariat à l'énergie atomique et aux énergies alternatives : UMR_E_9005 (Centre de Saclay Centre de Grenoble Centre de Cadarache etc - France)
- UPD7 - Université Paris Diderot - Paris 7 : UMR_7158 (5 rue Thomas-Mann - 75205 Paris cedex 13 - France)
4
IMP - Ingénierie des Matériaux Polymères (17, Av. Jean Capelle 69621 Villeurbanne Cedex - France)
- INC - Institut de Chimie du CNRS (3 Rue Michel-Ange 75 016 Paris - France)
- CNRS - Centre National de la Recherche Scientifique : UMR5223 (France)
- UJM - Université Jean Monnet [Saint-Étienne] (10 rue Tréfilerie - 42100 Saint-Étienne - France)
- INSA Lyon - Institut National des Sciences Appliquées de Lyon (20 Avenue Albert Einstein,
69621 Villeurbanne cedex - France)
- Université de Lyon (92 rue Pasteur - CS 30122, 69361 Lyon Cedex 07 - France)
- INSA - Institut National des Sciences Appliquées (France)
- UCBL - Université Claude Bernard Lyon 1 (43, boulevard du 11 novembre 1918, 69622 Villeurbanne cedex - France)
- Université de Lyon (92 rue Pasteur - CS 30122, 69361 Lyon Cedex 07 - France)
5
Uppsala University (Box 256, SE-751 05 Uppsala - Sweden)
6
ESRF - European Synchrotron Radiation Facility (6 rue Jules Horowitz BP220 38043 GRENOBLE CEDEX - France)
7
CR2P - Centre de Recherche en Paléontologie - Paris (8 rue Buffon - CP 38 - 75005 Paris - France)
- MNHN - Muséum national d'Histoire naturelle : USM203 (57, rue Cuvier - 75231 Paris Cedex 05 - France)
- SU - Sorbonne Université (21 rue de l’École de médecine - 75006 Paris - France)
- CNRS - Centre National de la Recherche Scientifique : UMR7207 (France)
8
Service d'Oncologie Médicale [CHRU Besançon] (1 Rue Claude Goudimel 25000 Besançon - France)
- CHRU Besançon - Centre Hospitalier Régional Universitaire de Besançon (3, boulevard A. Fleming - 25030 Besançon Cedex - France)
- UFC - Université de Franche-Comté (1 rue Goudimel 25030 Besançon cedex - France)
9
ObAS - Observatoire astronomique de Strasbourg (11 Rue de l'université 67000 STRASBOURG - France)
- UNISTRA - Université de Strasbourg (4 rue Blaise Pascal - CS 90032 - 67081 Strasbourg cedex - France)
- INSU - CNRS - Institut national des sciences de l'Univers (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- CNRS - Centre National de la Recherche Scientifique : UMR7550 (France)
Abstract : We observed the late-type peculiar galaxy NGC 4424 during the Virgo Environmental Survey Tracing Galaxy Evolution (VESTIGE), a blind narrow-band Hα+[NII] imaging survey of the Virgo cluster carried out with MegaCam at the Canada-French-Hawaii Telescope (CFHT). The presence of a ∼110 kpc (in projected distance) HI tail in the southern direction indicates that this galaxy is undergoing a ram pressure stripping event. The deep narrow-band image revealed a low surface brightness (Σ(Hα) ≃ 4 × 10−18 erg s−1 cm−2 arcsec−2) ionised gas tail ∼10 kpc in length extending from the centre of the galaxy to the north-west, thus in the direction opposite to the HI tail. Chandra and XMM X-rays data do not show a compact source in the nucleus or an extended tail of hot gas, while IFU spectroscopy (MUSE) indicates that the gas is photo-ionised in the inner regions and shock-ionised in the outer parts. Medium-resolution (MUSE) and high-resolution (Fabry-Perot) IFU spectroscopy confirms that the ionised gas is kinematically decoupled from the stellar component and indicates the presence of two kinematically distinct structures in the stellar disc. The analysis of the SED of the galaxy indicates that the activity of star formation was totally quenched in the outer disc ∼250–280 Myr ago, while only reduced by ∼80% in the central regions. All this observational evidence suggests that NGC 4424 is the remnant of an unequal-mass merger that occurred ≲500 Myr ago when the galaxy was already a member of the Virgo cluster, and is now undergoing a ram pressure stripping event that has removed the gas and quenched the activity of star formation in the outer disc. The tail of ionised gas probably results from the outflow produced by a central starburst fed by the collapse of gas induced by the merging episode. This outflow is sufficiently powerful to overcome the ram pressure induced by the intracluster medium on the disc of the galaxy crossing the cluster. This analysis thus suggests that feedback can participate in the quenching process of galaxies in high-density regions.
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https://hal.archives-ouvertes.fr/hal-03012078
Contributor : Edp Sciences Connect in order to contact the contributor
Submitted on : Wednesday, November 18, 2020 - 1:33:17 PM
Last modification on : Tuesday, January 4, 2022 - 4:10:12 AM
Long-term archiving on: : Friday, February 19, 2021 - 7:32:59 PM
Contributor : Edp Sciences Connect in order to contact the contributor
Submitted on : Wednesday, November 18, 2020 - 1:33:17 PM
Last modification on : Tuesday, January 4, 2022 - 4:10:12 AM
Long-term archiving on: : Friday, February 19, 2021 - 7:32:59 PM
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aa33914-18.pdf
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- HAL Id : hal-03012078, version 1
- DOI : 10.1051/0004-6361/201833914
Collections
INSU | LAM | CEA | UNIV-ST-ETIENNE | UNIV-LYON1 | DSM-IRFU | INC-CNRS | INSA-LYON | UNIV-AMU | INSA-GROUPE | MNHN | CR2P | IMP | CNRS | UDL | SITE-ALSACE | UNIV-PARIS7 | UP-SCIENCES | SU-SCIENCES | UNIV-PARIS | OSU-INSTITUT-PYTHEAS | CEA-DRF | SORBONNE-UNIVERSITE | USPC | SU-TI | IRFU-AIM | UNIV-FCOMTE
Citation
A. Boselli, M. Fossati, G. Consolandi, P. Amram, C. Ge, et al.. A Virgo Environmental Survey Tracing Ionised Gas Emission (VESTIGE): IV. A tail of ionised gas in the merger remnant NGC4424. Astronomy and Astrophysics - A&A, EDP Sciences, 2018, 620, pp.A164. ⟨10.1051/0004-6361/201833914⟩. ⟨hal-03012078⟩
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