ATOMS: ALMA Three-millimeter Observations of Massive Star-forming regions $-$ XVII. High-mass star-formation through a large-scale collapse in IRAS 15394$-$5358 Article Swipe

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Swagat Ranjan Das , Manuel Merello , L. Bronfman , Tie Liu , Guido Garay , Amelia M. Stutz , Diego Mardones , Jianwen Zhou , Patricio Sanhueza , Hongli Liu , Enrique Vázquez-Semadeni , Gilberto C. Gómez , Aina Palau , Anandmayee Tej , Fengwei Xu , Tapas Baug , L. K. Dewangan , Jinhua He , Lei Zhu , Shanghuo Li , M. Juvela , Anindya Saha , Namitha Issac , Jihye Hwang , Hafiz Nazeer , L. Viktor Toth ·

YOU? · · 2024 · Open Access · · DOI: https://doi.org/10.48550/arxiv.2409.19204

Hub-filament systems are considered as natural sites for high-mass star formation. Kinematic analysis of the surroundings of hub-filaments is essential to better understand high-mass star formation within such systems. In this work, we present a detailed study of the massive Galactic protocluster IRAS 15394$-$5358, using continuum and molecular line data from the ALMA Three-millimeter Observations of Massive Star-forming Regions (ATOMS) survey. The 3~mm dust continuum map reveals the fragmentation of the massive ($\rm M=843~M_{\odot}$) clump into six cores. The core C-1A is the largest (radius = 0.04~pc), the most massive ($\rm M=157~M_{\odot}$), and lies within the dense central region, along with two smaller cores ($\rm M=7~and~3~M_{\odot}$). The fragmentation process is consistent with the thermal Jeans fragmentation mechanism and virial analysis shows that all the cores have small virial parameter values ($\rm α_{vir}<<2$), suggesting that the cores are gravitationally bound. The mass vs. radius relation indicates that three cores can potentially form at least a single massive star. The integrated intensity map of $\rm H^{13}CO^{+}$ shows that the massive clump is associated with a hub-filament system, where the central hub is linked with four filaments. A sharp velocity gradient is observed towards the hub, suggesting a global collapse where the filaments are actively feeding the hub. We discuss the role of global collapse and the possible driving mechanisms for the massive star formation activity in the protocluster.

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Millimeter Star (game theory) Physics Astrophysics High mass Star formation Astronomy Scale (ratio) Stars Quantum mechanics

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Type: preprint
Language: en
Landing Page: http://arxiv.org/abs/2409.19204
PDF: https://arxiv.org/pdf/2409.19204
OA Status: green
Related Works: 10
OpenAlex ID: https://openalex.org/W4403810940

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DOI: https://doi.org/10.48550/arxiv.2409.19204

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Title: ATOMS: ALMA Three-millimeter Observations of Massive Star-forming regions $-$ XVII. High-mass star-formation through a large-scale collapse in IRAS 15394$-$5358

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Language: en

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Publication year: 2024

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Publication date: 2024-09-28

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Authors: Swagat Ranjan Das, Manuel Merello, L. Bronfman, Tie Liu, Guido Garay, Amelia M. Stutz, Diego Mardones, Jianwen Zhou, Patricio Sanhueza, Hongli Liu, Enrique Vázquez-Semadeni, Gilberto C. Gómez, Aina Palau, Anandmayee Tej, Fengwei Xu, Tapas Baug, L. K. Dewangan, Jinhua He, Lei Zhu, Shanghuo Li, M. Juvela, Anindya Saha, Namitha Issac, Jihye Hwang, Hafiz Nazeer, L. Viktor Toth

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Concepts: Millimeter, Star (game theory), Physics, Astrophysics, High mass, Star formation, Astronomy, Scale (ratio), Stars, Quantum mechanics

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abstract_inverted_index.the	14, 38, 51, 67, 70, 82, 87, 95, 112, 123, 134, 166, 176, 191, 198, 203, 207, 213, 218, 224
abstract_inverted_index.two	101
abstract_inverted_index.vs.	141
abstract_inverted_index.$\rm	162
abstract_inverted_index.3~mm	62
abstract_inverted_index.ALMA	52
abstract_inverted_index.C-1A	80
abstract_inverted_index.IRAS	42
abstract_inverted_index.core	79
abstract_inverted_index.data	49
abstract_inverted_index.dust	63
abstract_inverted_index.form	150
abstract_inverted_index.four	182
abstract_inverted_index.from	50
abstract_inverted_index.have	125
abstract_inverted_index.hub,	192
abstract_inverted_index.hub.	204
abstract_inverted_index.into	75
abstract_inverted_index.lies	93
abstract_inverted_index.line	48
abstract_inverted_index.mass	140
abstract_inverted_index.most	88
abstract_inverted_index.role	208
abstract_inverted_index.star	9, 24, 220
abstract_inverted_index.such	27
abstract_inverted_index.that	121, 133, 145, 165
abstract_inverted_index.this	30
abstract_inverted_index.with	100, 111, 171, 181
abstract_inverted_index.($\rm	72, 90, 104, 130
abstract_inverted_index.Jeans	114
abstract_inverted_index.along	99
abstract_inverted_index.clump	74, 168
abstract_inverted_index.cores	103, 124, 135, 147
abstract_inverted_index.dense	96
abstract_inverted_index.least	152
abstract_inverted_index.sharp	185
abstract_inverted_index.shows	120, 164
abstract_inverted_index.sites	6
abstract_inverted_index.small	126
abstract_inverted_index.star.	156
abstract_inverted_index.study	36
abstract_inverted_index.three	146
abstract_inverted_index.using	44
abstract_inverted_index.where	175, 197
abstract_inverted_index.work,	31
abstract_inverted_index.better	21
abstract_inverted_index.bound.	138
abstract_inverted_index.cores.	77
abstract_inverted_index.global	195, 210
abstract_inverted_index.linked	180
abstract_inverted_index.radius	142
abstract_inverted_index.single	154
abstract_inverted_index.values	129
abstract_inverted_index.virial	118, 127
abstract_inverted_index.within	26, 94
abstract_inverted_index.(ATOMS)	59
abstract_inverted_index.(radius	84
abstract_inverted_index.Massive	56
abstract_inverted_index.Regions	58
abstract_inverted_index.central	97, 177
abstract_inverted_index.discuss	206
abstract_inverted_index.driving	215
abstract_inverted_index.feeding	202
abstract_inverted_index.largest	83
abstract_inverted_index.massive	39, 71, 89, 155, 167, 219
abstract_inverted_index.natural	5
abstract_inverted_index.present	33
abstract_inverted_index.process	108
abstract_inverted_index.region,	98
abstract_inverted_index.reveals	66
abstract_inverted_index.smaller	102
abstract_inverted_index.survey.	60
abstract_inverted_index.system,	174
abstract_inverted_index.systems	1
abstract_inverted_index.thermal	113
abstract_inverted_index.towards	190
abstract_inverted_index.Galactic	40
abstract_inverted_index.actively	201
abstract_inverted_index.activity	222
abstract_inverted_index.analysis	12, 119
abstract_inverted_index.collapse	196, 211
abstract_inverted_index.detailed	35
abstract_inverted_index.gradient	187
abstract_inverted_index.observed	189
abstract_inverted_index.possible	214
abstract_inverted_index.relation	143
abstract_inverted_index.systems.	28
abstract_inverted_index.velocity	186
abstract_inverted_index.0.04~pc),	86
abstract_inverted_index.Kinematic	11
abstract_inverted_index.continuum	45, 64
abstract_inverted_index.essential	19
abstract_inverted_index.filaments	199
abstract_inverted_index.formation	25, 221
abstract_inverted_index.high-mass	8, 23
abstract_inverted_index.indicates	144
abstract_inverted_index.intensity	159
abstract_inverted_index.mechanism	116
abstract_inverted_index.molecular	47
abstract_inverted_index.parameter	128
abstract_inverted_index.associated	170
abstract_inverted_index.considered	3
abstract_inverted_index.consistent	110
abstract_inverted_index.filaments.	183
abstract_inverted_index.formation.	10
abstract_inverted_index.integrated	158
abstract_inverted_index.mechanisms	216
abstract_inverted_index.suggesting	132, 193
abstract_inverted_index.understand	22
abstract_inverted_index.potentially	149
abstract_inverted_index.Hub-filament	0
abstract_inverted_index.Observations	54
abstract_inverted_index.Star-forming	57
abstract_inverted_index.hub-filament	173
abstract_inverted_index.protocluster	41
abstract_inverted_index.surroundings	15
abstract_inverted_index.15394$-$5358,	43
abstract_inverted_index.H^{13}CO^{+}$	163
abstract_inverted_index.fragmentation	68, 107, 115
abstract_inverted_index.hub-filaments	17
abstract_inverted_index.protocluster.	225
abstract_inverted_index.gravitationally	137
abstract_inverted_index.Three-millimeter	53
abstract_inverted_index.M=843~M_{\odot}$)	73
abstract_inverted_index.M=157~M_{\odot}$),	91
abstract_inverted_index.α_{vir}<<2$),	131
abstract_inverted_index.M=7~and~3~M_{\odot}$).	105
cited_by_percentile_year
countries_distinct_count	0
institutions_distinct_count	26
citation_normalized_percentile