High-mass star-forming cloud G0.38+0.04 in the Galactic center dust ridge contains H 2 CO and SiO masers

Adam Ginsburg; Andrew Walsh; Christian Henkel; Paul A. Jones; Maria Cunningham; Jens Kauffmann; Thushara Pillai; Elisabeth A C Mills; Juergen Ott; J. M. Diederik Kruijssen; Karl M. Menten; Cara Battersby; Jill Rathborne; Yanett Contreras; Steven Longmore; Daniel Walker; Joanne Dawson; John A P Lopez

doi:10.1051/0004-6361/201527452

High-mass star-forming cloud G0.38+0.04 in the Galactic center dust ridge contains H ₂ CO and SiO masers

Adam Ginsburg
, Andrew Walsh
, Christian Henkel
, Paul A. Jones
, Maria Cunningham
, Jens Kauffmann
, Thushara Pillai
, Elisabeth A C Mills
, Juergen Ott
, J. M. Diederik Kruijssen
, Karl M. Menten
, Cara Battersby
, Jill Rathborne
, Yanett Contreras
, Steven Longmore
, Daniel Walker
, Joanne Dawson
, John A P Lopez

Research output: Contribution to journal › Article › peer-review

34 Citations (Scopus)

72 Downloads (Pure)

Abstract

We have discovered a new H₂CO (formaldehyde) 1_1,0-1_1,1 4.82966 GHz maser in Galactic center Cloud C, G0.38+0.04. At the time of acceptance, this is the eighth region to contain an H₂CO maser detected in the Galaxy. Cloud C is one of only two sites of confirmed high-mass star formation along the Galactic center ridge, affirming that H₂CO masers are exclusively associated with high-mass star formation. This discovery led us to search for other masers, among which we found new SiO vibrationally excited masers, making this the fourth star-forming region in the Galaxy to exhibit SiO maser emission. Cloud C is also a known source of CH₃OH Class-II and OH maser emission. There are now two known regions that contain both SiO and H₂CO masers in the CMZ, compared to two SiO and six H₂CO in the Galactic disk, while there is a relative dearth of H₂O and CH₃OH Class-II masers in the CMZ. SiO and H₂CO masers may be preferentially excited in the CMZ, perhaps because of higher gas-phase abundances from grain destruction and heating, or alternatively H₂O and CH₃OH maser formation may be suppressed in the CMZ. In any case, Cloud C is a new testing ground for understanding maser excitation conditions.

Original language	English
Article number	L7
Pages (from-to)	1-5
Number of pages	5
Journal	Astronomy and Astrophysics
Volume	584
DOIs	https://doi.org/10.1051/0004-6361/201527452
Publication status	Published - 1 Dec 2015

Bibliographical note

Copyright 2015 ESO, First published in Astronomy and Astrophysics, 584, L7, 2015 published by EDP Sciences. The original publication is available at http://10.1051/0004-6361/201527452. Reproduced with permission from Astronomy & Astrophysics, Â© ESO.

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Ginsburg, A., Walsh, A., Henkel, C., Jones, P. A., Cunningham, M., Kauffmann, J., Pillai, T., Mills, E. A. C., Ott, J., Diederik Kruijssen, J. M., Menten, K. M., Battersby, C., Rathborne, J., Contreras, Y., Longmore, S., Walker, D., Dawson, J., & Lopez, J. A. P. (2015). High-mass star-forming cloud G0.38+0.04 in the Galactic center dust ridge contains H ₂ CO and SiO masers. Astronomy and Astrophysics, 584, 1-5. Article L7. https://doi.org/10.1051/0004-6361/201527452

@article{4291cf3aaf50494ba1326f4e3e402566,

title = "High-mass star-forming cloud G0.38+0.04 in the Galactic center dust ridge contains H 2 CO and SiO masers",

abstract = "We have discovered a new H2CO (formaldehyde) 11,0-11,1 4.82966 GHz maser in Galactic center Cloud C, G0.38+0.04. At the time of acceptance, this is the eighth region to contain an H2CO maser detected in the Galaxy. Cloud C is one of only two sites of confirmed high-mass star formation along the Galactic center ridge, affirming that H2CO masers are exclusively associated with high-mass star formation. This discovery led us to search for other masers, among which we found new SiO vibrationally excited masers, making this the fourth star-forming region in the Galaxy to exhibit SiO maser emission. Cloud C is also a known source of CH3OH Class-II and OH maser emission. There are now two known regions that contain both SiO and H2CO masers in the CMZ, compared to two SiO and six H2CO in the Galactic disk, while there is a relative dearth of H2O and CH3OH Class-II masers in the CMZ. SiO and H2CO masers may be preferentially excited in the CMZ, perhaps because of higher gas-phase abundances from grain destruction and heating, or alternatively H2O and CH3OH maser formation may be suppressed in the CMZ. In any case, Cloud C is a new testing ground for understanding maser excitation conditions.",

author = "Adam Ginsburg and Andrew Walsh and Christian Henkel and Jones, \{Paul A.\} and Maria Cunningham and Jens Kauffmann and Thushara Pillai and Mills, \{Elisabeth A C\} and Juergen Ott and \{Diederik Kruijssen\}, \{J. M.\} and Menten, \{Karl M.\} and Cara Battersby and Jill Rathborne and Yanett Contreras and Steven Longmore and Daniel Walker and Joanne Dawson and Lopez, \{John A P\}",

note = "Copyright 2015 ESO, First published in Astronomy and Astrophysics, 584, L7, 2015 published by EDP Sciences. The original publication is available at http://10.1051/0004-6361/201527452. Reproduced with permission from Astronomy \& Astrophysics, {\^A}{\textcopyright} ESO.",

year = "2015",

month = dec,

day = "1",

doi = "10.1051/0004-6361/201527452",

language = "English",

volume = "584",

pages = "1--5",

journal = "Astronomy and Astrophysics",

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Ginsburg, A, Walsh, A, Henkel, C, Jones, PA, Cunningham, M, Kauffmann, J, Pillai, T, Mills, EAC, Ott, J, Diederik Kruijssen, JM, Menten, KM, Battersby, C, Rathborne, J, Contreras, Y, Longmore, S, Walker, D, Dawson, J & Lopez, JAP 2015, 'High-mass star-forming cloud G0.38+0.04 in the Galactic center dust ridge contains H ₂ CO and SiO masers', Astronomy and Astrophysics, vol. 584, L7, pp. 1-5. https://doi.org/10.1051/0004-6361/201527452

TY - JOUR

T1 - High-mass star-forming cloud G0.38+0.04 in the Galactic center dust ridge contains H 2 CO and SiO masers

AU - Ginsburg, Adam

AU - Walsh, Andrew

AU - Henkel, Christian

AU - Jones, Paul A.

AU - Cunningham, Maria

AU - Kauffmann, Jens

AU - Pillai, Thushara

AU - Mills, Elisabeth A C

AU - Ott, Juergen

AU - Diederik Kruijssen, J. M.

AU - Menten, Karl M.

AU - Battersby, Cara

AU - Rathborne, Jill

AU - Contreras, Yanett

AU - Longmore, Steven

AU - Walker, Daniel

AU - Dawson, Joanne

AU - Lopez, John A P

N1 - Copyright 2015 ESO, First published in Astronomy and Astrophysics, 584, L7, 2015 published by EDP Sciences. The original publication is available at http://10.1051/0004-6361/201527452. Reproduced with permission from Astronomy & Astrophysics, Â© ESO.

PY - 2015/12/1

Y1 - 2015/12/1

N2 - We have discovered a new H2CO (formaldehyde) 11,0-11,1 4.82966 GHz maser in Galactic center Cloud C, G0.38+0.04. At the time of acceptance, this is the eighth region to contain an H2CO maser detected in the Galaxy. Cloud C is one of only two sites of confirmed high-mass star formation along the Galactic center ridge, affirming that H2CO masers are exclusively associated with high-mass star formation. This discovery led us to search for other masers, among which we found new SiO vibrationally excited masers, making this the fourth star-forming region in the Galaxy to exhibit SiO maser emission. Cloud C is also a known source of CH3OH Class-II and OH maser emission. There are now two known regions that contain both SiO and H2CO masers in the CMZ, compared to two SiO and six H2CO in the Galactic disk, while there is a relative dearth of H2O and CH3OH Class-II masers in the CMZ. SiO and H2CO masers may be preferentially excited in the CMZ, perhaps because of higher gas-phase abundances from grain destruction and heating, or alternatively H2O and CH3OH maser formation may be suppressed in the CMZ. In any case, Cloud C is a new testing ground for understanding maser excitation conditions.

AB - We have discovered a new H2CO (formaldehyde) 11,0-11,1 4.82966 GHz maser in Galactic center Cloud C, G0.38+0.04. At the time of acceptance, this is the eighth region to contain an H2CO maser detected in the Galaxy. Cloud C is one of only two sites of confirmed high-mass star formation along the Galactic center ridge, affirming that H2CO masers are exclusively associated with high-mass star formation. This discovery led us to search for other masers, among which we found new SiO vibrationally excited masers, making this the fourth star-forming region in the Galaxy to exhibit SiO maser emission. Cloud C is also a known source of CH3OH Class-II and OH maser emission. There are now two known regions that contain both SiO and H2CO masers in the CMZ, compared to two SiO and six H2CO in the Galactic disk, while there is a relative dearth of H2O and CH3OH Class-II masers in the CMZ. SiO and H2CO masers may be preferentially excited in the CMZ, perhaps because of higher gas-phase abundances from grain destruction and heating, or alternatively H2O and CH3OH maser formation may be suppressed in the CMZ. In any case, Cloud C is a new testing ground for understanding maser excitation conditions.

UR - https://www.scopus.com/pages/publications/84948411288

U2 - 10.1051/0004-6361/201527452

DO - 10.1051/0004-6361/201527452

M3 - Article

AN - SCOPUS:84948411288

SN - 0004-6361

VL - 584

SP - 1

EP - 5

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - L7

ER -

High-mass star-forming cloud G0.38+0.04 in the Galactic center dust ridge contains H ₂ CO and SiO masers

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