J/ApJ/938/55 ALMA 12CO obs. of YSOs in the Serpens region (Anderson+, 2022)
Protostellar and protoplanetary disk masses in the Serpens region.
Anderson A.R., Williams J.P., van der Marel N., Law C.J., Ricci L.,
Tobin J.J., Tong S.
<Astrophys. J., 938, 55 (2022)>
=2022ApJ...938...55A 2022ApJ...938...55A
ADC_Keywords: YSOs; Star Forming Region; Stars, distances; Carbon monoxide;
Photometry, millimetric/submm; Stars, masses
Keywords: Protoplanetary disks ; Pre-main sequence stars ;
Submillimeter astronomy
Abstract:
We present the results from an Atacama Large Millimeter/submillimeter
Array (ALMA) 1.3mm continuum and 12CO (J=2-1) line survey spread
over 10deg2 in the Serpens star-forming region of 320 young stellar
objects, 302 of which are likely members of Serpens (16 Class I,
35 flat-spectrum, 235 Class II, and 16 Class III). From the continuum
data, we derive disk dust masses and show that they systematically
decline from Class I to flat-spectrum to Class II sources. Grouped by
stellar evolutionary state, the disk mass distributions are similar to
other young (<3Myr) regions, indicating that the large-scale
environment of a star-forming region does not strongly affect its
overall disk dust mass properties. These comparisons between
populations reinforce previous conclusions that disks in the Ophiuchus
star-forming region have anomalously low masses at all evolutionary
stages. Additionally, we find a single deeply embedded protostar that
has not been documented elsewhere in the literature and, from the CO
line data, 15 protostellar outflows, which we catalog here.
Description:
We observed the sample of 320 protoplanetary disks observed in the
Serpens star-forming region in ALMA Cycle 7 program 2019.1.00218.S
(PI: van der Marel). The observations were carried out in Band 6
(1.3mm) in the C-2 configuration (baselines from 15 to 314m) with
43 antennas on 2019-Dec-19 and 31. Each source was observed in a
single pointing with an integration time of 20s. Three wide spectral
windows provided a total continuum bandwidth of 5.6GHz centered on
241.4GHz, and the fourth was a narrow window centered around the
12CO 2-1 line (230.536GHz) at 0.32km/s spectral resolution.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 97 315 Source parameters
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See also:
I/337 : Gaia DR1 (Gaia Collaboration, 2016)
I/350 : Gaia EDR3 (Gaia Collaboration, 2020)
J/ApJ/663/1149 : Spitzer survey of Serpens YSO population (Harvey+, 2007)
J/ApJS/181/321 : Properties of Spitzer c2d dark clouds (Evans+, 2009)
J/ApJ/771/129 : Submillimetric Class II sources of Taurus (Andrews+, 2013)
J/ApJS/220/11 : SEDs of Spitzer YSOs in the Gould Belt (Dunham+, 2015)
J/ApJ/828/46 : ALMA survey of Lupus protopl. disks. I. (Ansdell+, 2016)
J/A+A/592/A126 : Transition disk survey (van der Marel+, 2016)
J/AJ/153/240 : ALMA survey of protopl. disks in sigma Ori (Ansdell+, 2017)
J/AJ/156/271 : The stellar membership of the Taurus SFR (Luhman, 2018)
J/A+A/626/A11 : Corona Australis ALMA and X-Shooter data (Cazzoletti+, 2019)
J/MNRAS/482/698 : Oph DIsc Survey Employing ALMA (ODISEA). I. (Cieza+, 2019)
J/ApJ/878/111 : Members in Serpens MoC with Gaia DR2 (Herczeg+, 2019)
J/ApJ/875/L9 : ODISEA: Disk dust mass distributions (Williams+, 2019)
J/A+A/634/A98 : Corona-Australis DANCe. I. (Galli+, 2020)
J/ApJ/890/130 : VANDAM survey of Orion protostars. II. (Tobin+, 2020)
J/ApJ/921/72 : Class II & III disks with Gaia and ALMA data (Michel+, 2021)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- 2MASS 2MASS identifier (HHMMSSss+DDMMSSs; J2000)
18- 26 F9.5 deg RAdeg [271.2/280.1] Right Ascension (J2000)
28- 35 F8.5 deg DEdeg [-4.7/1.4] Declination (J2000)
37- 43 F7.2 pc Dist [192/2865] Distance
45- 52 F8.2 pc e_Dist [2.8/12166] RMS uncertainty in Dist
54- 56 A3 --- Class Source class (1)
58- 62 F5.2 mJy F1.3mm [-1.2/68.3] The ALMA Band 6 (1.3mm)
continuum flux
64- 67 F4.2 mJy e_F1.3mm [0.1/3.3] RMS uncertainty in F1.3mm
69- 74 F6.2 Mgeo Mass [-74.5/724.3] Disk mass
76- 82 F7.2 Mgeo e_Mass [0.5/5574] RMS uncertainty in Mass
84- 88 F5.2 Jy.km/s FCO [0.04/26.7] The 12CO flux
90- 93 F4.2 Jy.km/s e_FCO [0.02/6.5] RMS uncertainty in FCO
95- 97 A3 --- Flag Source flag(s) (2)
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Note (1): Class as follows:
I = Class I; 16 occurrences
F = Flat spectrum; 38 occurrences (including 3 outside the boundaries
of Serpens, cf. "G" in col. Flag)
II = Class II; 245 occurrences (including 10 outside the boundaries of
Serpens, cf. "G" in col. Flag)
III = Class III; 16 occurrences
Note (2): Flag as follows:
O = Target is associated with 12CO outflow.
B = Target is within 2.5" (∼1000AU) of another sub-mm detection
of at least 3σ; see Section 4.1
G = Target is located at a very large (>675pc) or
small (<275pc) distance --well outside the boundaries of the Serpens
cloud.
T = Object is a transition disk candidate as identified
by van der Marel+ 2016, J/A+A/592/A126
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 23-Aug-2024